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mm: prevent do_swap_page from handling page faults under VMA lock
authorSuren Baghdasaryan <surenb@google.com>
Mon, 27 Feb 2023 17:36:25 +0000 (09:36 -0800)
committerAndrew Morton <akpm@linux-foundation.org>
Tue, 28 Mar 2023 23:24:55 +0000 (16:24 -0700)
commit2d9f306b5854dd50275f303ed24755134ea836ea
tree63b62d1d8a5d2d85ac9416fbbd288ff92bd43df7tree
parent1ad189ae62eb5b69481e9b97c40010e2470a3175commit | diff
mm: prevent do_swap_page from handling page faults under VMA lock

Due to the possibility of do_swap_page dropping mmap_lock, abort fault
handling under VMA lock and retry holding mmap_lock.  This can be handled
more gracefully in the future.

Link: https://lkml.kernel.org/r/20230227173632.3292573-27-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Laurent Dufour <laurent.dufour@fr.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/memory.c diff | blob | history
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