mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2024-11-22 04:38:03 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
Linux kernel source tree
1,296,160 Commits 7 Branches 862 Tags 7.5 GiB
C 97.6%
Assembly 1%
Shell 0.5%
Python 0.3%
Makefile 0.3%
6c99d4eb7c
Go to file
Pavel Tikhomirov 6c99d4eb7c kmemleak: enable tracking for percpu pointers 
Patch series "kmemleak: support for percpu memory leak detect'.

This is a rework of this series:
https://lore.kernel.org/lkml/20200921020007.35803-1-chenjun102@huawei.com/

Originally I was investigating a percpu leak on our customer nodes and
having this functionality was a huge help, which lead to this fix [1].

So probably it's a good idea to have it in mainstream too, especially as
after [2] it became much easier to implement (we already have a separate
tree for percpu pointers).

[1] commit 0af8c09c89 ("netfilter: x_tables: fix percpu counter block leak on error path when creating new netns")
[2] commit 39042079a0 ("kmemleak: avoid RCU stalls when freeing metadata for per-CPU pointers")


This patch (of 2):

This basically does:

- Add min_percpu_addr and max_percpu_addr to filter out unrelated data
  similar to min_addr and max_addr;

- Set min_count for percpu pointers to 1 to start tracking them;

- Calculate checksum of percpu area as xor of crc32 for each cpu;

- Split pointer lookup and update refs code into separate helper and use
  it twice: once as if the pointer is a virtual pointer and once as if
  it's percpu.

[ptikhomirov@virtuozzo.com: v2]
  Link: https://lkml.kernel.org/r/20240731025526.157529-2-ptikhomirov@virtuozzo.com
Link: https://lkml.kernel.org/r/20240725041223.872472-1-ptikhomirov@virtuozzo.com
Link: https://lkml.kernel.org/r/20240725041223.872472-2-ptikhomirov@virtuozzo.com
Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Wei Yongjun <weiyongjun1@huawei.com>
Cc: Chen Jun <chenjun102@huawei.com>
Cc: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-09-01 20:25:49 -07:00
arch mm: kvmalloc: align kvrealloc() with krealloc() 2024-09-01 20:25:44 -07:00
block block: fix detection of unsupported WRITE SAME in blkdev_issue_write_zeroes 2024-08-28 08:49:25 -06:00
certs
crypto
Documentation USB fixes for 6.11-rc6 2024-09-01 07:06:28 +12:00
drivers mm: kvmalloc: align kvrealloc() with krealloc() 2024-09-01 20:25:44 -07:00
fs mm: kvmalloc: align kvrealloc() with krealloc() 2024-09-01 20:25:44 -07:00
include task_stack: uninline stack_not_used 2024-09-01 20:25:49 -07:00
init mm: fix typo in Kconfig 2024-09-01 20:25:45 -07:00
io_uring io_uring/kbuf: return correct iovec count from classic buffer peek 2024-08-30 10:45:54 -06:00
ipc
kernel task_stack: uninline stack_not_used 2024-09-01 20:25:49 -07:00
lib mm: kvmalloc: align kvrealloc() with krealloc() 2024-09-01 20:25:44 -07:00
LICENSES
mm kmemleak: enable tracking for percpu pointers 2024-09-01 20:25:49 -07:00
net Including fixes from bluetooth, wireless and netfilter. 2024-08-30 06:14:39 +12:00
rust Rust fixes for v6.11 2024-08-16 11:24:06 -07:00
samples treewide: remove unnecessary <linux/version.h> inclusion 2024-08-12 18:36:44 +09:00
scripts net: drop special comment style 2024-08-23 10:21:02 +01:00
security Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging 2024-09-01 09:18:48 +12:00
sound sound fixes for 6.11-rc6 2024-08-28 06:24:22 +12:00
tools IOMMU Fixes for Linux v6.11-rc5 2024-08-31 06:11:34 +12:00
usr
virt KVM: x86: Disallow read-only memslots for SEV-ES and SEV-SNP (and TDX) 2024-08-14 12:28:24 -04:00
.clang-format
.cocciconfig
.editorconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap ARM: SoC fixes for 6.11, part 2 2024-09-01 06:42:13 +12:00
.rustfmt.toml
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS USB fixes for 6.11-rc6 2024-09-01 07:06:28 +12:00
Makefile Linux 6.11-rc6 2024-09-01 19:46:02 +12:00
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 reStructuredText 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.