linux/arch/s390
Michael Holzheu d7736ff5be s390/dump: Fix dump memory detection
Dumps created by kdump or zfcpdump can contain invalid memory holes when
dumping z/VM systems that have memory pressure.

For example:

   # zgetdump -i /proc/vmcore.
   Memory map:
   0000000000000000 - 0000000000bfffff (12 MB)
   0000000000e00000 - 00000000014fffff (7 MB)
   000000000bd00000 - 00000000f3bfffff (3711 MB)

The memory detection function find_memory_chunks() issues tprot to
find valid memory chunks. In case of CMM it can happen that pages are
marked as unstable via set_page_unstable() in arch_free_page().
If z/VM has released that pages, tprot returns -EFAULT and indicates
a memory hole.

So fix this and switch off CMM in case of kdump or zfcpdump.

Cc: <stable@vger.kernel.org>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-02-04 15:39:51 +01:00
..
appldata s390/appldata: restore missing init_virt_timer() 2014-01-29 09:07:51 +01:00
boot s390/boot: Install bzImage as default kernel image 2013-11-15 14:08:36 +01:00
configs s390: add a couple of useful defconfigs 2013-10-24 17:17:14 +02:00
crypto crypto: arch - use crypto_memneq instead of memcmp 2013-12-20 20:06:24 +08:00
hypfs s390/hypfs: add interface for diagnose 0x304 2014-01-24 09:40:59 +01:00
include Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-01-28 09:02:24 -08:00
kernel s390: wire up sys_sched_setattr/sys_sched_getattr 2014-01-22 14:02:19 +01:00
kvm First round of KVM updates for 3.14; PPC parts will come next week. 2014-01-22 21:40:43 -08:00
lib s390/uaccess: remove dead extern declarations, make functions static 2014-01-22 14:02:17 +01:00
math-emu s390: fix save and restore of the floating-point-control register 2013-10-24 17:17:11 +02:00
mm s390/dump: Fix dump memory detection 2014-02-04 15:39:51 +01:00
net s390/bpf,jit: fix 32 bit divisions, use unsigned divide instructions 2014-01-17 18:54:49 -08:00
oprofile s390/cpum_sf: Add raw data sampling to support the diagnostic-sampling function 2013-12-16 14:38:00 +01:00
pci PCI changes for the v3.14 merge window: 2014-01-22 16:39:28 -08:00
defconfig Update default configuration 2013-10-24 17:17:15 +02:00
Kbuild s390/pci: base support 2012-11-30 15:40:45 +01:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-01-28 09:02:24 -08:00
Kconfig.debug Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS 2013-04-30 17:04:09 -07:00
Makefile s390: allow to set gcc -mtune flag 2013-10-31 09:54:01 +01:00