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| author |   Hugh Dickins <hughd@google.com> | 2010-09-09 16:38:09 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2010-09-09 18:57:25 -0700 |
| commit | b73d7fcecd93dc15eaa3c45c8c587b613f6673c4 (patch) | |
| tree | ebf5a5e10fb246237807317a81f6f40c3eebcd9c /mm/hugetlb.c | |
| parent | swap: revert special hibernation allocation (diff) | |
| download | wireguard-linux-b73d7fcecd93dc15eaa3c45c8c587b613f6673c4.tar.xz wireguard-linux-b73d7fcecd93dc15eaa3c45c8c587b613f6673c4.zip | |
swap: prevent reuse during hibernation
Move the hibernation check from scan_swap_map() into try_to_free_swap():
to catch not only the common case when hibernation's allocation itself
triggers swap reuse, but also the less likely case when concurrent page
reclaim (shrink_page_list) might happen to try_to_free_swap from a page.
Hibernation already clears __GFP_IO from the gfp_allowed_mask, to stop
reclaim from going to swap: check that to prevent swap reuse too.
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Ondrej Zary <linux@rainbow-software.org>
Cc: Andrea Gelmini <andrea.gelmini@gmail.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Nigel Cunningham <nigel@tuxonice.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
0 files changed, 0 insertions, 0 deletions