revert "mm: oom analysis: add buffer cache information to show_free_areas()"
authorAndrew Morton <akpm@linux-foundation.org>
Mon, 26 Oct 2009 23:49:52 +0000 (16:49 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 29 Oct 2009 14:39:27 +0000 (07:39 -0700)
commitb76146ed1ae7d7acae1d51f9342e31d00c8d5a12
treeea8d8923070cb8fdf6eeb50ee9e21fd085b2ac73
parent5c36fe3d87b3f0c85894a49193c66096a3d6b26f
revert "mm: oom analysis: add buffer cache information to show_free_areas()"

Revert

    commit 71de1ccbe1fb40203edd3beb473f8580d917d2ca
    Author:     KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    AuthorDate: Mon Sep 21 17:01:31 2009 -0700
    Commit:     Linus Torvalds <torvalds@linux-foundation.org>
    CommitDate: Tue Sep 22 07:17:27 2009 -0700

        mm: oom analysis: add buffer cache information to show_free_areas()

show_free_areas() is called during page allocation failures, and page
allocation failures can occur in any calling context.

But nr_blockdev_pages() takes VFS locks which should not be taken from
hard IRQ context (at least).  The result is lockdep warnings (and
deadlockability) during page allocation failures.

Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/page_alloc.c