diff options
| author | Tony Luck <tony.luck@intel.com> | 2022-10-21 22:01:20 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-12-01 00:58:40 +0100 |
| commit | d302c2398ba269e788a4f37ae57c07a7fcabaa42 (patch) | |
| tree | cd952d14e1487c62ac8e43135cd832f7f5807018 /mm | |
| parent | mm, hwpoison: try to recover from copy-on write faults (diff) | |
| download | linux-d302c2398ba269e788a4f37ae57c07a7fcabaa42.tar.xz linux-d302c2398ba269e788a4f37ae57c07a7fcabaa42.zip | |
mm, hwpoison: when copy-on-write hits poison, take page offline
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
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>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c index 13b1fe661d86..659620b6770f 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2816,8 +2816,10 @@ static inline int __wp_page_copy_user(struct page *dst, struct page *src, unsigned long addr = vmf->address; if (likely(src)) { - if (copy_mc_user_highpage(dst, src, addr, vma)) + if (copy_mc_user_highpage(dst, src, addr, vma)) { + memory_failure_queue(page_to_pfn(src), 0); return -EHWPOISON; + } return 0; } |