]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
mm/thp: do not wait for lock_page() in deferred_split_scan()
authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Thu, 22 Mar 2018 23:17:31 +0000 (16:17 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 23 Mar 2018 00:07:01 +0000 (17:07 -0700)
commitfa41b900c30b45fab03783724932dc30cd46a6be
tree4468eaa7456c2e6a439be4df0ed2ec8238e4fa46
parentfece2029a9e65b9a990831afe2a2b83290cbbe26
mm/thp: do not wait for lock_page() in deferred_split_scan()

deferred_split_scan() gets called from reclaim path.  Waiting for page
lock may lead to deadlock there.

Replace lock_page() with trylock_page() and skip the page if we failed
to lock it.  We will get to the page on the next scan.

Link: http://lkml.kernel.org/r/20180315150747.31945-1-kirill.shutemov@linux.intel.com
Fixes: 9a982250f773 ("thp: introduce deferred_split_huge_page()")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/huge_memory.c