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Tony Luck e20f45ee4e mm, hwpoison: when copy-on-write hits poison, take page offline 
commit d302c2398b upstream.

Cannot call memory_failure() directly from the fault handler because
mmap_lock (and others) are held.

It is important, but not urgent, to mark the source page as h/w poisoned
and unmap it from other tasks.

Use memory_failure_queue() to request a call to memory_failure() for the
page with the error.

Also provide a stub version for CONFIG_MEMORY_FAILURE=n

Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20221021200120.175753-3-tony.luck@intel.com
Signed-off-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Shuai Xue <xueshuai@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Due to missing commits
  e591ef7d96 ("mm,hwpoison,hugetlb,memory_hotplug: hotremove memory section with hwpoisoned hugepage")
  5033091de8 ("mm/hwpoison: introduce per-memory_block hwpoison counter")
  The impact of e591ef7d96 is its introduction of an additional flag in
  __get_huge_page_for_hwpoison() that serves as an indication a hwpoisoned
  hugetlb page should have its migratable bit cleared.
  The impact of 5033091de8 is contexual.
  Resolve by ignoring both missing commits. - jane]
Signed-off-by: Jane Chu <jane.chu@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-20 15:24:10 +08:00
arch x86/apic: Fix kernel panic when booting with intremap=off and x2apic_phys 2023-08-20 15:24:05 +08:00
block blk-iocost: avoid 64-bit division in ioc_timer_fn 2023-08-20 15:21:23 +08:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2023-04-19 17:50:34 +08:00
crypto KEYS: asymmetric: Copy sig and digest in public_key_verify_signature() 2023-08-20 15:21:12 +08:00
Documentation Remove DECnet support from kernel 2023-08-20 15:23:42 +08:00
drivers i2c: imx-lpi2c: fix type char overflow issue when calculating the clock cycle 2023-08-20 15:24:05 +08:00
fs nilfs2: prevent general protection fault in nilfs_clear_dirty_page() 2023-08-20 15:24:00 +08:00
include mm, hwpoison: when copy-on-write hits poison, take page offline 2023-08-20 15:24:10 +08:00
init kbuild: Add CONFIG_PAHOLE_VERSION 2023-04-19 17:59:33 +08:00
io_uring io_uring/net: disable partial retries for recvmsg with cmsg 2023-08-20 15:23:59 +08:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2023-04-19 17:56:54 +08:00
kernel bpf/btf: Accept function names that contain dots 2023-08-20 15:24:03 +08:00
lib test_firmware: fix a memory leak with reqs buffer 2023-08-20 15:21:36 +08:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm, hwpoison: when copy-on-write hits poison, take page offline 2023-08-20 15:24:10 +08:00
net mptcp: consolidate fallback and non fallback state machine 2023-08-20 15:24:10 +08:00
samples samples/bpf: Fix fout leak in hbm's run_bpf_prog 2023-06-06 18:39:30 +08:00
scripts gcc-plugins: Reorganize gimple includes for GCC 13 2023-08-20 15:21:22 +08:00
security selinux: don't use make's grouped targets feature yet 2023-08-20 15:21:11 +08:00
sound ASoC: nau8824: Add quirk to active-high jack-detect 2023-08-20 15:24:05 +08:00
tools act_mirred: remove unneded merge conflict markers 2023-08-20 15:24:05 +08:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2023-04-19 17:44:58 +08:00
virt KVM: Avoid illegal stage2 mapping on invalid memory slot 2023-08-20 15:23:58 +08:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Remove DECnet support from kernel 2023-08-20 15:23:42 +08:00
Makefile Linux 5.15.119 2023-08-20 15:24:05 +08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.