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Filename Latest commit message Latest commit date
Ravi Bangoria ddb1a77f94 perf/amd/ibs: Use interrupt regs ip for stack unwinding 
[ Upstream commit 3d47083b9ff46863e8374ad3bb5edb5e464c75f8 ]

IbsOpRip is recorded when IBS interrupt is triggered. But there is
a skid from the time IBS interrupt gets triggered to the time the
interrupt is presented to the core. Meanwhile processor would have
moved ahead and thus IbsOpRip will be inconsistent with rsp and rbp
recorded as part of the interrupt regs. This causes issues while
unwinding stack using the ORC unwinder as it needs consistent rip,
rsp and rbp. Fix this by using rip from interrupt regs instead of
IbsOpRip for stack unwinding.

Fixes: ee9f8fce99 ("x86/unwind: Add the ORC unwinder")
Reported-by: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220429051441.14251-1-ravi.bangoria@amd.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-14 18:11:36 +02:00
arch perf/amd/ibs: Use interrupt regs ip for stack unwinding 2022-06-14 18:11:36 +02:00
block block: return ELEVATOR_DISCARD_MERGE if possible 2022-05-25 09:14:38 +02:00
certs
crypto crypto: ecrdsa - Fix incorrect use of vli_cmp 2022-06-06 08:33:50 +02:00
Documentation hwmon: Make chip parameter for with_info API mandatory 2022-06-14 18:11:29 +02:00
drivers Revert "cpufreq: Fix possible race in cpufreq online error path" 2022-06-14 18:11:36 +02:00
fs iomap: iomap_write_failed fix 2022-06-14 18:11:36 +02:00
include x86/speculation: Add missing prototype for unpriv_ebpf_notify() 2022-06-14 18:11:34 +02:00
init
ipc
kernel sched/fair: Fix cfs_rq_clock_pelt() for throttled cfs_rq 2022-06-14 18:11:33 +02:00
lib assoc_array: Fix BUG_ON during garbage collect 2022-06-06 08:33:50 +02:00
LICENSES
mm zsmalloc: fix races between asynchronous zspage free and page migration 2022-06-06 08:33:50 +02:00
net NFC: NULL out the dev->rfkill to prevent UAF 2022-06-14 18:11:33 +02:00
samples
scripts
security lockdown: also lock down previous kgdb use 2022-06-06 08:33:48 +02:00
sound ASoC: rk3328: fix disabling mclk on pclk probe failure 2022-06-14 18:11:34 +02:00
tools perf tools: Add missing headers needed by util/data.h 2022-06-14 18:11:34 +02:00
usr
virt
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Makefile Linux 5.4.197 2022-06-06 08:33:51 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.