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39d6d08b2e
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Beau Belgrave 39d6d08b2e tracing/user_events: Use bits vs bytes for enabled status page data 
User processes may require many events and when they do the cache
performance of a byte index status check is less ideal than a bit index.
The previous event limit per-page was 4096, the new limit is 32,768.

This change adds a bitwise index to the user_reg struct. Programs check
that the bit at status_bit has a bit set within the status page(s).

Link: https://lkml.kernel.org/r/20220728233309.1896-6-beaub@linux.microsoft.com
Link: https://lore.kernel.org/all/2059213643.196683.1648499088753.JavaMail.zimbra@efficios.com/

Suggested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-09-29 10:17:37 -04:00
..
acrn sample/acrn: Introduce a sample of HSM ioctl interface usage 2021-02-09 10:58:19 +01:00
auxdisplay .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
binderfs .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
bpf samples: bpf: Fix cross-compiling error by using bootstrap bpftool 2022-07-15 12:01:30 -07:00
configfs treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
connector .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
coresight coresight: syscfg: Example CoreSight configuration loadable module 2021-11-26 11:34:07 -07:00
fanotify Add gitignore file for samples/fanotify/ subdirectory 2021-11-07 11:19:24 -08:00
fprobe Fixes and minor clean ups for tracing: 2022-07-12 16:17:40 -07:00
ftrace x86/ibt,ftrace: Add ENDBR to samples/ftrace 2022-03-15 10:32:38 +01:00
hidraw .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
hw_breakpoint samples/hw_breakpoint: drop use of kallsyms_lookup_name() 2020-04-07 10:43:44 -07:00
kdb kdb: Rename members of struct kdbtab_t 2021-07-27 17:05:06 +01:00
kfifo samples/kfifo: Rename read_lock/write_lock 2021-10-13 14:36:48 +02:00
kmemleak mm,kmemleak-test.c: move kmemleak-test.c to samples dir 2020-10-13 18:38:27 -07:00
kobject samples/kobject: Use sysfs_emit instead of sprintf 2022-03-18 14:28:29 +01:00
kprobes samples: Use KSYM_NAME_LEN for kprobes 2022-07-12 16:36:45 -04:00
landlock samples/landlock: Add support for file reparenting 2022-05-23 13:28:00 +02:00
livepatch livepatch: Reorder to use before freeing a pointer 2022-03-23 13:51:11 +01:00
mei samples: mei: don't wait on read completion upon write. 2021-08-01 09:54:22 +02:00
nitro_enclaves nitro_enclaves: Add fixes for checkpatch blank line reports 2021-09-14 11:11:20 +02:00
pidfd .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
pktgen samples: pktgen: add trap SIGINT for printing execution result 2021-08-25 13:44:30 +01:00
qmi samples: qmi: Constify static qmi ops 2020-11-24 17:08:47 -06:00
rpmsg samples/rpmsg: Introduce a module parameter for message count 2019-08-26 22:10:39 -07:00
seccomp samples/seccomp: Adjust sample to also provide kill option 2022-02-10 19:09:12 -08:00
timers .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
trace_events tracing: Add example and documentation for new __vstring() macro 2022-07-24 19:11:17 -04:00
trace_printk samples/trace_printk: Wait for IRQ work to finish 2019-12-21 16:08:22 -05:00
uhid kbuild: introduce hostprogs-always-y and userprogs-always-y 2020-08-10 01:32:59 +09:00
user_events tracing/user_events: Use bits vs bytes for enabled status page data 2022-09-29 10:17:37 -04:00
v4l treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_168.RULE (part 2) 2022-06-10 14:51:36 +02:00
vfio-mdev vfio/mdev: Remove mdev_parent_ops 2022-04-21 07:36:56 -04:00
vfs .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
watch_queue .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
watchdog .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
Kconfig Networking changes for 5.18. 2022-03-24 13:13:26 -07:00
Makefile Networking changes for 5.18. 2022-03-24 13:13:26 -07:00