Commit Graph

288540 Commits

Author SHA1 Message Date
Ingo Molnar
bea95c152d Merge branch 'perf/hw-branch-sampling' into perf/core
Merge reason: The 'perf record -b' hardware branch sampling feature is ready for upstream.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-12 20:47:05 +01:00
Stephane Eranian
24bff2dc0f perf report: Fix annotate double quit issue in branch view mode
This patch fixes perf report to not go back two levels when
pressing the 'q' key while annotating in branch view mode.

When pressing 'q' in annotate mode and if the branch source
and target belong to different functions, perf now brings
up the annotation popup menu again to offer the option to
annotate the other branch source or target.

As part of the code restructuring in perf_evsel__hists_browse()
we also fix a memory leak on options[] in case of error.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1331565210-10865-3-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-12 20:46:16 +01:00
Stephane Eranian
8bcd65fd29 perf report: Remove duplicate annotate choice in branch view mode
This patch removes the duplicated annotate selection when
browsing in branch view mode. If the sym and dso oof the branch
source and target are the same, then only one annotate choice is
proposed.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1331565210-10865-2-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-12 20:46:16 +01:00
Peter Zijlstra
f9b4eeb809 perf/x86: Prettify pmu config literals
I got somewhat tired of having to decode hex numbers..

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Stephane Eranian <eranian@google.com>
Cc: Robert Richter <robert.richter@amd.com>
Link: http://lkml.kernel.org/n/tip-0vsy1sgywc4uar3mu1szm0rg@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-12 20:44:54 +01:00
Ingo Molnar
35239e23c6 Merge branch 'perf/urgent' into perf/core
Merge reason: We are going to queue up a dependent patch.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-12 20:44:11 +01:00
Peter Zijlstra
87e24f4b67 perf/x86: Fix local vs remote memory events for NHM/WSM
Verified using the below proglet.. before:

[root@westmere ~]# perf stat -e node-stores -e node-store-misses ./numa 0
remote write

 Performance counter stats for './numa 0':

         2,101,554 node-stores
         2,096,931 node-store-misses

       5.021546079 seconds time elapsed

[root@westmere ~]# perf stat -e node-stores -e node-store-misses ./numa 1
local write

 Performance counter stats for './numa 1':

           501,137 node-stores
               199 node-store-misses

       5.124451068 seconds time elapsed

After:

[root@westmere ~]# perf stat -e node-stores -e node-store-misses ./numa 0
remote write

 Performance counter stats for './numa 0':

         2,107,516 node-stores
         2,097,187 node-store-misses

       5.012755149 seconds time elapsed

[root@westmere ~]# perf stat -e node-stores -e node-store-misses ./numa 1
local write

 Performance counter stats for './numa 1':

         2,063,355 node-stores
               165 node-store-misses

       5.082091494 seconds time elapsed

#define _GNU_SOURCE

#include <sched.h>
#include <stdio.h>
#include <errno.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <dirent.h>
#include <signal.h>
#include <unistd.h>
#include <numaif.h>
#include <stdlib.h>

#define SIZE (32*1024*1024)

volatile int done;

void sig_done(int sig)
{
	done = 1;
}

int main(int argc, char **argv)
{
	cpu_set_t *mask, *mask2;
	size_t size;
	int i, err, t;
	int nrcpus = 1024;
	char *mem;
	unsigned long nodemask = 0x01; /* node 0 */
	DIR *node;
	struct dirent *de;
	int read = 0;
	int local = 0;

	if (argc < 2) {
		printf("usage: %s [0-3]\n", argv[0]);
		printf("  bit0 - local/remote\n");
		printf("  bit1 - read/write\n");
		exit(0);
	}

	switch (atoi(argv[1])) {
	case 0:
		printf("remote write\n");
		break;
	case 1:
		printf("local write\n");
		local = 1;
		break;
	case 2:
		printf("remote read\n");
		read = 1;
		break;
	case 3:
		printf("local read\n");
		local = 1;
		read = 1;
		break;
	}

	mask = CPU_ALLOC(nrcpus);
	size = CPU_ALLOC_SIZE(nrcpus);
	CPU_ZERO_S(size, mask);

	node = opendir("/sys/devices/system/node/node0/");
	if (!node)
		perror("opendir");
	while ((de = readdir(node))) {
		int cpu;

		if (sscanf(de->d_name, "cpu%d", &cpu) == 1)
			CPU_SET_S(cpu, size, mask);
	}
	closedir(node);

	mask2 = CPU_ALLOC(nrcpus);
	CPU_ZERO_S(size, mask2);
	for (i = 0; i < size; i++)
		CPU_SET_S(i, size, mask2);
	CPU_XOR_S(size, mask2, mask2, mask); // invert

	if (!local)
		mask = mask2;

	err = sched_setaffinity(0, size, mask);
	if (err)
		perror("sched_setaffinity");

	mem = mmap(0, SIZE, PROT_READ|PROT_WRITE,
			MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
	err = mbind(mem, SIZE, MPOL_BIND, &nodemask, 8*sizeof(nodemask), MPOL_MF_MOVE);
	if (err)
		perror("mbind");

	signal(SIGALRM, sig_done);
	alarm(5);

	if (!read) {
		while (!done) {
			for (i = 0; i < SIZE; i++)
				mem[i] = 0x01;
		}
	} else {
		while (!done) {
			for (i = 0; i < SIZE; i++)
				t += *(volatile char *)(mem + i);
		}
	}

	return 0;
}

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/n/tip-tq73sxus35xmqpojf7ootxgs@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-12 20:43:41 +01:00
Linus Torvalds
fde7d9049e Linux 3.3-rc7 2012-03-10 13:49:52 -08:00
Al Viro
c7b2855505 aio: fix the "too late munmap()" race
Current code has put_ioctx() called asynchronously from aio_fput_routine();
that's done *after* we have killed the request that used to pin ioctx,
so there's nothing to stop io_destroy() waiting in wait_for_all_aios()
from progressing.  As the result, we can end up with async call of
put_ioctx() being the last one and possibly happening during exit_mmap()
or elf_core_dump(), neither of which expects stray munmap() being done
to them...

We do need to prevent _freeing_ ioctx until aio_fput_routine() is done
with that, but that's all we care about - neither io_destroy() nor
exit_aio() will progress past wait_for_all_aios() until aio_fput_routine()
does really_put_req(), so the ioctx teardown won't be done until then
and we don't care about the contents of ioctx past that point.

Since actual freeing of these suckers is RCU-delayed, we don't need to
bump ioctx refcount when request goes into list for async removal.
All we need is rcu_read_lock held just over the ->ctx_lock-protected
area in aio_fput_routine().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Acked-by: Benjamin LaHaise <bcrl@kvack.org>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-09 18:59:59 -08:00
Al Viro
86b62a2cb4 aio: fix io_setup/io_destroy race
Have ioctx_alloc() return an extra reference, so that caller would drop it
on success and not bother with re-grabbing it on failure exit.  The current
code is obviously broken - io_destroy() from another thread that managed
to guess the address io_setup() would've returned would free ioctx right
under us; gets especially interesting if aio_context_t * we pass to
io_setup() points to PROT_READ mapping, so put_user() fails and we end
up doing io_destroy() on kioctx another thread has just got freed...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Benjamin LaHaise <bcrl@kvack.org>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-09 18:59:59 -08:00
Linus Torvalds
86e0600833 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs updates from Chris Mason:
 "I have two additional and btrfs fixes in my for-linus branch.  One is
  a casting error that leads to memory corruption on i386 during scrub,
  and the other fixes a corner case in the backref walking code (also
  triggered by scrub)."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix casting error in scrub reada code
  btrfs: fix locking issues in find_parent_nodes()
2012-03-09 18:09:18 -08:00
Hugh Dickins
be22aece68 memcg: revert fix to mapcount check for this release
Respectfully revert commit e6ca7b89dc "memcg: fix mapcount check
in move charge code for anonymous page" for the 3.3 release, so that
it behaves exactly like releases 2.6.35 through 3.2 in this respect.

Horiguchi-san's commit is correct in itself, 1 makes much more sense
than 2 in that check; but it does not go far enough - swapcount
should be considered too - if we really want such a check at all.

We appear to have reached agreement now, and expect that 3.4 will
remove the mapcount check, but had better not make 3.3 different.

Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-09 15:32:20 -08:00
Thomas Gleixner
a7f4255f90 x86: Derandom delay_tsc for 64 bit
Commit f0fbf0abc0 ("x86: integrate delay functions") converted
delay_tsc() into a random delay generator for 64 bit.  The reason is
that it merged the mostly identical versions of delay_32.c and
delay_64.c.  Though the subtle difference of the result was:

 static void delay_tsc(unsigned long loops)
 {
-	unsigned bclock, now;
+	unsigned long bclock, now;

Now the function uses rdtscl() which returns the lower 32bit of the
TSC. On 32bit that's not problematic as unsigned long is 32bit. On 64
bit this fails when the lower 32bit are close to wrap around when
bclock is read, because the following check

       if ((now - bclock) >= loops)
       	  	break;

evaluated to true on 64bit for e.g. bclock = 0xffffffff and now = 0
because the unsigned long (now - bclock) of these values results in
0xffffffff00000001 which is definitely larger than the loops
value. That explains Tvortkos observation:

"Because I am seeing udelay(500) (_occasionally_) being short, and
 that by delaying for some duration between 0us (yep) and 491us."

Make those variables explicitely u32 again, so this works for both 32
and 64 bit.

Reported-by: Tvrtko Ursulin <tvrtko.ursulin@onelan.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org # >= 2.6.27
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-09 12:43:27 -08:00
Linus Torvalds
c447064de4 sound fixes for 3.3-rc7
Nothing exciting here: just a few regression fixes for HD-audio and ASoC,
 also the support of missing 32bit compat ioctl for HDSPM.
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Merge tag 'sound-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Nothing exciting here: just a few regression fixes for HD-audio and
  ASoC, also the support of missing 32bit compat ioctl for HDSPM."

* tag 'sound-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hdspm - Provide ioctl_compat
  ALSA: hda/realtek - Apply the coef-setup only to ALC269VB
  ALSA: hda - add quirk to detect CD input on Gigabyte EP45-DS3
  ASoC: neo1973: fix neo1973 wm8753 initialization
2012-03-09 12:14:23 -08:00
David Brown
8cd5c8661d MAINTAINERS: new git entry for arm/mach-msm
The msm git tree moved to

  git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm.git

Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-09 12:13:36 -08:00
Linus Torvalds
0ab5d757db Fix for C6X KSTK_EIP and KSTK_ESP macros.
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Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming

Pull C6X fix from Mark Salter:
 "Fix for C6X KSTK_EIP and KSTK_ESP macros."

* tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming:
  C6X: fix KSTK_EIP and KSTK_ESP macros
2012-03-09 07:27:38 -08:00
Linus Torvalds
0cacaf51a0 IOMMU fixes for Linux v3.3-rc6
Two fixes are queued up. The first is an additional fix for the OMAP
 initialization order issue and the second patch fixes a possible section
 mismatch which can lead to a kernel crash in the AMD IOMMU driver when
 suspend/resume is used and the compiler has not inlined the
 iommu_set_device_table function.
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Merge tag 'iommu-fixes-v3.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull two IOMMU fixes from Joerg Roedel:
 "The first is an additional fix for the OMAP initialization order issue
  and the second patch fixes a possible section mismatch which can lead
  to a kernel crash in the AMD IOMMU driver when suspend/resume is used
  and the compiler has not inlined the iommu_set_device_table function."

* tag 'iommu-fixes-v3.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  x86/amd: iommu_set_device_table() must not be __init
  ARM: OMAP: fix iommu, not mailbox
2012-03-09 07:26:25 -08:00
Linus Torvalds
45b8da90f2 Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull radeon drm stuff from Dave Airlie:
 "Just some radeon fixes, one is for an oops where we run out of ioremap
  space on some big hardware systems in 32-bit mode, stuff doesn't work
  properly but at least the machine will boot.

  One regression fix, and two bugs, one hw, one blit code."

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/radeon/kms: fix hdmi duallink checks
  drm/radeon/kms: set SX_MISC in the r6xx blit code (v2)
  drm/radeon: deal with errors from framebuffer init path.
  drm/radeon: fix a semaphore deadlock on pre cayman asics
2012-03-09 07:23:17 -08:00
Linus Torvalds
e304dfdb03 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking from David Miller:

1) IPV4 routing metrics can become stale when routes are changed by the
   administrator, fix from Steffen Klassert.

2) atl1c does "val |= XXX;" where XXX is a bit number not a bit mask,
   fix by using set_bit.  From Dan Carpenter.

3) Memory accounting bug in carl9170 driver results in wedged TX queue.
   Fix from Nicolas Cavallari.

4) iwlwifi accidently uses "sizeof(ptr)" instead of "sizeof(*ptr)", fix
   from Johannes Berg.

5) Openvswitch doesn't honor dp_ifindex when doing vport lookups, fix
   from Ben Pfaff.

6) ehea conversion to 64-bit stats lost multicast and rx_errors
   accounting, fix from Eric Dumazet.

7) Bridge state transition logging in br_stp_disable_port() is busted,
   it's emitted at the wrong time and the message is in the wrong tense,
   fix from Paulius Zaleckas.

8) mlx4 device erroneously invokes the queue resize firmware operation
   twice, fix from Jack Morgenstein.

9) Fix deadlock in usbnet, need to drop lock when invoking usb_unlink_urb()
   otherwise we recurse into taking it again.  Fix from Sebastian Siewior.

10) hyperv network driver uses the wrong driver name string, fix from
    Haiyang Zhang.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  net/hyperv: Use the built-in macro KBUILD_MODNAME for this driver
  net/usbnet: avoid recursive locking in usbnet_stop()
  route: Remove redirect_genid
  inetpeer: Invalidate the inetpeer tree along with the routing cache
  mlx4_core: fix bug in modify_cq wrapper for resize flow.
  atl1c: set ATL1C_WORK_EVENT_RESET bit correctly
  bridge: fix state reporting when port is disabled
  bridge: br_log_state() s/entering/entered/
  ehea: restore multicast and rx_errors fields
  openvswitch: Fix checksum update for actions on UDP packets.
  openvswitch: Honor dp_ifindex, when specified, for vport lookup by name.
  iwlwifi: fix wowlan suspend
  mwifiex: reset encryption mode flag before association
  carl9170: fix frame delivery if sta is in powersave mode
  carl9170: Fix memory accounting when sta is in power-save mode.
2012-03-09 07:14:44 -08:00
Stephane Eranian
a68c2c5817 perf report: Enable TUI in branch view mode
This patch updates perf report to support TUI mode
when the perf.data file contains samples with branch
stacks.

For each row in the report, it is possible to annotate
either the source or target of each branch.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1331246868-19905-5-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:08 +01:00
Stephane Eranian
993ac88d58 perf report: Auto-detect branch stack sampling mode
This patch enhances perf report to auto-detect when the
perf.data file contains samples with branch stacks. That way it
is not necessary to use the -b option.

To force branch view mode to off, simply use --no-branch-stack.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1331246868-19905-4-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:08 +01:00
Stephane Eranian
330aa675b4 perf record: Add HEADER_BRANCH_STACK tag
This patch adds a new feature bit, namely,
HEADER_BRANCH_STACK.  When present, it indicates
that sample records may contain branch stack.

This could be useful to a viewer to switch to
branch mode without having to parse all the
samples or without a specific cmdline option.

This will be used in a subsequent patch to
enhance perf report with branch stacks.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1331246868-19905-3-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:08 +01:00
Stephane Eranian
a5aabdacde perf record: Provide default branch stack sampling mode option
This patch chanegs the logic of the -b, --branch-stack options
of perf record.

Based on users' request, the patch provides a default filter
mode with the -b (or --branch-any) option.  With the option,
any type of taken branches is sampled.

With -j (or --branch-filter), the user can specify any
valid combination of branch types and privilege levels
if supported by the underlying hardware.

The -b (--branch any) is a shortcut for: --branch-filter any.

 $ perf record -b foo

or:

 $ perf record --branch-filter any foo

For more specific filtering:

 $ perf record --branch-filter ind_call,u foo

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1331246868-19905-2-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:07 +01:00
Stephane Eranian
114382a0ae perf tools: Make perf able to read files from older ABIs
This patches provides a way to handle legacy perf.data
files.  Legacy files are those using the older PERFFILE
signature.

For those, it is still necessary to detect endianness but
without comparing their header->attr_size with the
tool's own version as it may be different. Instead, we use
a reference table for all known sizes from the legacy era.

We try all the combinations for sizes and endianness. If we find
a match, we proceed, otherwise we return: "incompatible file
format".

This is also done for the pipe-mode file format.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: robert.richter@amd.com
Cc: ming.m.lin@intel.com
Cc: andi@firstfloor.org
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1328826068-11713-19-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:07 +01:00
Stephane Eranian
62db90681c perf tools: Fix ABI compatibility bug in print_event_desc()
This patches cleans up local variable types for msz and ret.
They need to be size_t and ssize_t respectively.

It also fixes a bug whereby perf would not read attr struct
with a different size than what it knows about.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: robert.richter@amd.com
Cc: ming.m.lin@intel.com
Cc: andi@firstfloor.org
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1328826068-11713-18-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:06 +01:00
Stephane Eranian
69996df486 perf tools: Enable reading of perf.data files from different ABI rev
This patch allows perf to process perf.data files generated
using an ABI that has a different perf_event_attr struct size,
i.e., a different ABI version.

The perf_event_attr can be extended, yet perf needs to cope with
older perf.data files. Similarly, perf must be able to cope with
a perf.data file which is using a newer version of the ABI than
what it knows about.

This patch adds read_attr(), a routine that reads a
perf_event_attr struct from a file incrementally based on its
advertised size. If the on-file struct is smaller than what perf
knows, then the extra fields are zeroed. If the on-file struct
is bigger, then perf only uses what it knows about, the rest is
skipped.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: robert.richter@amd.com
Cc: ming.m.lin@intel.com
Cc: andi@firstfloor.org
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1328826068-11713-17-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:06 +01:00
Stephane Eranian
cb5d769990 perf: Add ABI reference sizes
This patch adds reference sizes for revision 1
and 2 of the perf_event ABI, i.e., the size of
the perf_event_attr struct.

With Rev1: config2 was added = +8 bytes
With Rev2: branch_sample_type was added = +8 bytes

Adds the definition for Rev1, Rev2.

This is useful for tools trying to decode the revision
numbers based on the size of the struct.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: robert.richter@amd.com
Cc: ming.m.lin@intel.com
Cc: andi@firstfloor.org
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1328826068-11713-16-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:05 +01:00
Roberto Agostino Vitillo
b50311dc2a perf report: Add support for taken branch sampling
This patch adds support for taken branch sampling, i.e, the
PERF_SAMPLE_BRANCH_STACK feature to perf report. In other
words, to display histograms based on taken branches rather
than executed instructions addresses.

The new option is called -b and it takes no argument. To
generate meaningful output, the perf.data must have been
obtained using perf record -b xxx ... where xxx is a branch
filter option.

The output shows symbols, modules, sorted by 'who branches
where' the most often. The percentages reported in the first
column refer to the total number of branches captured and
not the usual number of samples.

Here is a quick example.
Here branchy is simple test program which looks as follows:

void f2(void)
{}
void f3(void)
{}
void f1(unsigned long n)
{
  if (n & 1UL)
    f2();
  else
    f3();
}
int main(void)
{
  unsigned long i;

  for (i=0; i < N; i++)
   f1(i);
  return 0;
}

Here is the output captured on Nehalem, if we are
only interested in user level function calls.

$ perf record -b any_call,u -e cycles:u branchy

$ perf report -b --sort=symbol
    52.34%  [.] main                   [.] f1
    24.04%  [.] f1                     [.] f3
    23.60%  [.] f1                     [.] f2
     0.01%  [k] _IO_new_file_xsputn    [k] _IO_file_overflow
     0.01%  [k] _IO_vfprintf_internal  [k] _IO_new_file_xsputn
     0.01%  [k] _IO_vfprintf_internal  [k] strchrnul
     0.01%  [k] __printf               [k] _IO_vfprintf_internal
     0.01%  [k] main                   [k] __printf

About half (52%) of the call branches captured are from main()
-> f1(). The second half (24%+23%) is split in two equal shares
between f1() -> f2(), f1() ->f3(). The output is as expected
given the code.

It should be noted, that using -b in perf record does not
eliminate information in the perf.data file. Consequently, a
typical profile can also be obtained by perf report by simply
not using its -b option.

It is possible to sort on branch related columns:

   - dso_from, symbol_from
   - dso_to, symbol_to
   - mispredict

Signed-off-by: Roberto Agostino Vitillo <ravitillo@lbl.gov>
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: robert.richter@amd.com
Cc: ming.m.lin@intel.com
Cc: andi@firstfloor.org
Cc: asharma@fb.com
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1328826068-11713-14-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:05 +01:00
Roberto Agostino Vitillo
bdfebd848f perf record: Add support for sampling taken branch
This patch adds a new option to enable taken branch stack
sampling, i.e., leverage the PERF_SAMPLE_BRANCH_STACK feature
of perf_events.

There is a new option to active this mode: -b.
It is possible to pass a set of filters to select the type of
branches to sample.

The following filters are available:

 - any : any type of branches
 - any_call : any function call or system call
 - any_ret : any function return or system call return
 - any_ind : any indirect branch
 - u:  only when the branch target is at the user level
 - k: only when the branch target is in the kernel
 - hv: only when the branch target is in the hypervisor

Filters can be combined by passing a comma separated list
to the option:

$ perf record -b any_call,u -e cycles:u branchy

Signed-off-by: Roberto Agostino Vitillo <ravitillo@lbl.gov>
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: robert.richter@amd.com
Cc: ming.m.lin@intel.com
Cc: andi@firstfloor.org
Cc: asharma@fb.com
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1328826068-11713-13-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:05 +01:00
Roberto Agostino Vitillo
b5387528f3 perf tools: Add code to support PERF_SAMPLE_BRANCH_STACK
This patch adds:

 - ability to parse samples with PERF_SAMPLE_BRANCH_STACK
 - sort on branches (dso_from, symbol_from, dso_to, symbol_to, mispredict)
 - build histograms on branches

Signed-off-by: Roberto Agostino Vitillo <ravitillo@lbl.gov>
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: robert.richter@amd.com
Cc: ming.m.lin@intel.com
Cc: andi@firstfloor.org
Cc: asharma@fb.com
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1328826068-11713-12-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09 08:26:04 +01:00
Linus Torvalds
9f8050c4f9 Last minute fixes for 3.3
One samsung build fix due to a mis-applied patch, and a small set of OMAP fixes.
 This should be the last from arm-soc for 3.3, hopefully.
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Merge tag 'fixes-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull last minute fixes from Olof Johansson:
 "One samsung build fix due to a mis-applied patch, and a small set of
  OMAP fixes.  This should be the last from arm-soc for 3.3, hopefully."

* tag 'fixes-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: S3C2440: Fixed build error for s3c244x
  ARM: OMAP2+: Fix module build errors with CONFIG_OMAP4_ERRATA_I688
  ARM: OMAP: id: Add missing break statement in omap3xxx_check_revision
  ARM: OMAP2+: Remove apply_uV constraints for fixed regulator
  ARM: OMAP: irqs: Fix NR_IRQS value to handle PRCM interrupts
2012-03-08 17:32:42 -08:00
Linus Torvalds
9a0cee7114 Another small, clear fix in a specific driver.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fix from Mark Brown:
 "Another small, clear fix in a specific driver."

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: tps65910: Configure correct value for VDDCTRL vout reg
2012-03-08 17:25:17 -08:00
Linus Torvalds
ee0849c911 Minor bug fixes and documentation updates for v3.3-rc5
Fixes up a duplicate #include, adds an empty implementation of
 of_find_compatible_node() and make git ignore .dtb files.  And fix
 up bus name on OF described PHYs.  Nothing exciting here.
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Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6

Pull minor devicetree bug fixes and documentation updates from Grant Likely:
 "Fixes up a duplicate #include, adds an empty implementation of
  of_find_compatible_node() and make git ignore .dtb files.  And fix up
  bus name on OF described PHYs.  Nothing exciting here."

* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6:
  doc: dt: Fix broken reference in gpio-leds documentation
  of/mdio: fix fixed link bus name
  of/fdt.c: asm/setup.h included twice
  of: add picochip vendor prefix
  dt: add empty of_find_compatible_node function
  ARM: devicetree: Add .dtb files to arch/arm/boot/.gitignore
2012-03-08 17:24:27 -08:00
Linus Torvalds
7d77696e92 SPI section mismatch bug fix for v3.3-rc3
Russell King (1):
       Fix section mismatch in spi-pl022.c
 
 Minor fix for pl022_dma_probe() function which was put in the wrong section.
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Merge tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6

Pull SPI section mismatch bug fix for v3.3-rc3 from Grant Likely:
 "Minor fix for pl022_dma_probe() function which was put in the wrong
  section."

* tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6:
  Fix section mismatch in spi-pl022.c
2012-03-08 17:23:45 -08:00
Linus Torvalds
42a6c7ef3b Four patches since v3.3-rc6:
1bd612a hwmon: (jc42) Add support for AT30TS00, TS3000GB2, TSE2002GB2, and MCP9804
 7ad6307 hwmon: (zl6100) Maintain delay parameter in driver instance data
 7cb3c44 hwmon: (pmbus_core) Fix maximum number of POUT alarm attributes
 4de8612 hwmon: (jc42) Add support for ST Microelectronics STTS2002 and STTS3000
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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull four hwmon patches from Guenter Roeck

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (jc42) Add support for AT30TS00, TS3000GB2, TSE2002GB2, and MCP9804
  hwmon: (zl6100) Maintain delay parameter in driver instance data
  hwmon: (pmbus_core) Fix maximum number of POUT alarm attributes
  hwmon: (jc42) Add support for ST Microelectronics STTS2002 and STTS3000
2012-03-08 17:22:54 -08:00
Linus Torvalds
5d0edf2915 Device-mapper fixes for 3.3.
Eight small device-mapper bug fixes.
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Merge tag 'dm-3.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm

Pull device-mapper fixes for 3.3 from Alasdair Kergon

Eight small device-mapper bug fixes.

* tag 'dm-3.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm:
  dm raid: fix flush support
  dm raid: set MD_CHANGE_DEVS when rebuilding
  dm thin metadata: decrement counter after removing mapped block
  dm thin metadata: unlock superblock in init_pmd error path
  dm thin metadata: remove incorrect close_device on creation error paths
  dm flakey: fix crash on read when corrupt_bio_byte not set
  dm io: fix discard support
  dm ioctl: do not leak argv if target message only contains whitespace
2012-03-08 17:21:51 -08:00
Haiyang Zhang
d31b20fcc8 net/hyperv: Use the built-in macro KBUILD_MODNAME for this driver
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: Olaf Hering <olaf@aepfle.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08 13:55:27 -08:00
Olof Johansson
c66fcfa938 Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP2+: Fix module build errors with CONFIG_OMAP4_ERRATA_I688
  ARM: OMAP: id: Add missing break statement in omap3xxx_check_revision
  ARM: OMAP2+: Remove apply_uV constraints for fixed regulator
  ARM: OMAP: irqs: Fix NR_IRQS value to handle PRCM interrupts
2012-03-08 10:56:12 -08:00
Kukjin Kim
48546cc0a5 ARM: S3C2440: Fixed build error for s3c244x
Fixed following:
arch/arm/mach-s3c2440/s3c244x.c: In function 's3c244x_restart':
arch/arm/mach-s3c2440/s3c244x.c:209: error: expected declaration or statement at end of input
make[1]: *** [arch/arm/mach-s3c24xx/s3c244x.o] Error 1
make: *** [arch/arm/mach-s3c24xx] Error 2

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
2012-03-08 08:57:29 -08:00
Adrian Knoth
8de5d6f19b ALSA: hdspm - Provide ioctl_compat
snd_hdspm uses its own ioctls to acquire config- and status information.
Expose the corresponding ioctl handler via ioctl_compat, so that 32bit
applications can use it on 64bit kernels.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-03-08 15:58:58 +01:00
Jan Beulich
6b7f000eb6 x86/amd: iommu_set_device_table() must not be __init
This function is called from enable_iommus(), which in turn is used
from amd_iommu_resume().

Cc: stable@vger.kernel.org
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-03-08 11:36:06 +01:00
Alex Deucher
38aa4a568b drm/radeon/kms: fix hdmi duallink checks
All pre-SI chips are limited to 165 Mhz for single link.
Code in question will be re-enabled when SI support is added.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=44755
https://bugzilla.kernel.org/show_bug.cgi?id=42887

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-03-08 09:39:54 +00:00
Marek Olšák
cf00790dea drm/radeon/kms: set SX_MISC in the r6xx blit code (v2)
Mesa may set it to 1, causing all primitives to be killed.

v2: also update the r7xx code

Signed-off-by: Marek Olšák <maraeo@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-03-08 09:39:29 +00:00
Sebastian Siewior
4231d47e6f net/usbnet: avoid recursive locking in usbnet_stop()
|kernel BUG at kernel/rtmutex.c:724!
|[<c029599c>] (rt_spin_lock_slowlock+0x108/0x2bc) from [<c01c2330>] (defer_bh+0x1c/0xb4)
|[<c01c2330>] (defer_bh+0x1c/0xb4) from [<c01c3afc>] (rx_complete+0x14c/0x194)
|[<c01c3afc>] (rx_complete+0x14c/0x194) from [<c01cac88>] (usb_hcd_giveback_urb+0xa0/0xf0)
|[<c01cac88>] (usb_hcd_giveback_urb+0xa0/0xf0) from [<c01e1ff4>] (musb_giveback+0x34/0x40)
|[<c01e1ff4>] (musb_giveback+0x34/0x40) from [<c01e2b1c>] (musb_advance_schedule+0xb4/0x1c0)
|[<c01e2b1c>] (musb_advance_schedule+0xb4/0x1c0) from [<c01e2ca8>] (musb_cleanup_urb.isra.9+0x80/0x8c)
|[<c01e2ca8>] (musb_cleanup_urb.isra.9+0x80/0x8c) from [<c01e2ed0>] (musb_urb_dequeue+0xec/0x108)
|[<c01e2ed0>] (musb_urb_dequeue+0xec/0x108) from [<c01cbb90>] (unlink1+0xbc/0xcc)
|[<c01cbb90>] (unlink1+0xbc/0xcc) from [<c01cc2ec>] (usb_hcd_unlink_urb+0x54/0xa8)
|[<c01cc2ec>] (usb_hcd_unlink_urb+0x54/0xa8) from [<c01c2a84>] (unlink_urbs.isra.17+0x2c/0x58)
|[<c01c2a84>] (unlink_urbs.isra.17+0x2c/0x58) from [<c01c2b44>] (usbnet_terminate_urbs+0x94/0x10c)
|[<c01c2b44>] (usbnet_terminate_urbs+0x94/0x10c) from [<c01c2d68>] (usbnet_stop+0x100/0x15c)
|[<c01c2d68>] (usbnet_stop+0x100/0x15c) from [<c020f718>] (__dev_close_many+0x94/0xc8)

defer_bh() takes the lock which is hold during unlink_urbs(). The safe
walk suggest that the skb will be removed from the list and this is done
by defer_bh() so it seems to be okay to drop the lock here.

Cc: stable@kernel.org
Reported-by: Aníbal Almeida Pinto <anibal.pinto@efacec.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08 00:49:29 -08:00
Steffen Klassert
ac3f48de09 route: Remove redirect_genid
As we invalidate the inetpeer tree along with the routing cache now,
we don't need a genid to reset the redirect handling when the routing
cache is flushed.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08 00:30:32 -08:00
Steffen Klassert
5faa5df1fa inetpeer: Invalidate the inetpeer tree along with the routing cache
We initialize the routing metrics with the values cached on the
inetpeer in rt_init_metrics(). So if we have the metrics cached on the
inetpeer, we ignore the user configured fib_metrics.

To fix this issue, we replace the old tree with a fresh initialized
inet_peer_base. The old tree is removed later with a delayed work queue.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08 00:30:24 -08:00
Jack Morgenstein
dcf353b170 mlx4_core: fix bug in modify_cq wrapper for resize flow.
The actual FW command is called in procedure "handle_resize".
Code incorrectly invoked the FW command again (in good flow), in
the modify_cq wrapper function.

Fix by skipping second FW invocation unconditionally for resize.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08 00:28:01 -08:00
Dan Carpenter
7831545732 atl1c: set ATL1C_WORK_EVENT_RESET bit correctly
ATL1C_WORK_EVENT_RESET is zero so the original code here is a nop.  The
intent was to set the zero bit.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08 00:27:45 -08:00
Paulius Zaleckas
5200959b83 bridge: fix state reporting when port is disabled
Now we have:
eth0: link *down*
br0: port 1(eth0) entered *forwarding* state

br_log_state(p) should be called *after* p->state is set
to BR_STATE_DISABLED.

Reported-by: Zilvinas Valinskas <zilvinas@wilibox.com>
Signed-off-by: Paulius Zaleckas <paulius.zaleckas@gmail.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08 00:25:25 -08:00
Paulius Zaleckas
d9e179ecec bridge: br_log_state() s/entering/entered/
When br_log_state() is reporting state it should say "entered"
istead of "entering" since state at this point is already
changed.

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08 00:25:25 -08:00
Eric Dumazet
09c1d446fe ehea: restore multicast and rx_errors fields
Commit 239c562c94 (ehea: Add 64bit statistics) added a regression,
since we no longer report multicast & rx_errors fields, taken from
port->stats structure. These fields are updated in ehea_update_stats()
every second.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Acked-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Tested-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08 00:23:04 -08:00