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author | Hugh Dickins <hugh.dickins@tiscali.co.uk> | 2009-09-22 04:03:27 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 18:17:40 +0400 |
commit | 2a15efc953b26ad57d7d38b9e6782d57e53b4ab2 (patch) | |
tree | f4d04903b3303e80460d2fa3f38da2b7eea82d22 /ipc | |
parent | 8e4b9a60718970bbc02dfd3abd0b956ab65af231 (diff) | |
download | linux-2a15efc953b26ad57d7d38b9e6782d57e53b4ab2.tar.xz |
mm: follow_hugetlb_page flags
follow_hugetlb_page() shouldn't be guessing about the coredump case
either: pass the foll_flags down to it, instead of just the write bit.
Remove that obscure huge_zeropage_ok() test. The decision is easy,
though unlike the non-huge case - here vm_ops->fault is always set.
But we know that a fault would serve up zeroes, unless there's
already a hugetlbfs pagecache page to back the range.
(Alternatively, since hugetlb pages aren't swapped out under pressure,
you could save more dump space by arguing that a page not yet faulted
into this process cannot be relevant to the dump; but that would be
more surprising.)
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions