]> git.baikalelectronics.ru Git - kernel.git/commit
userfaultfd: replace ENOSPC with ESRCH in case mm has gone during copy/zeropage
authorMike Rapoport <rppt@linux.vnet.ibm.com>
Thu, 10 Aug 2017 22:24:32 +0000 (15:24 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 10 Aug 2017 22:54:07 +0000 (15:54 -0700)
commita7ae6a3cc649ed43a363fec9308d123e2a4d7b6a
treeef1d29b5737ebbe5bdcf966bcd69a152e634a0b8
parentac0b76c0b55dc40e9c91d898d4a256868ecfa54e
userfaultfd: replace ENOSPC with ESRCH in case mm has gone during copy/zeropage

When the process exit races with outstanding mcopy_atomic, it would be
better to return ESRCH error.  When such race occurs the process and
it's mm are going away and returning "no such process" to the uffd
monitor seems better fit than ENOSPC.

Link: http://lkml.kernel.org/r/1502111545-32305-1-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Suggested-by: Michal Hocko <mhocko@suse.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/userfaultfd.c