]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
Revert "mm: compaction: handle incorrect MIGRATE_UNMOVABLE type pageblocks"
authorLinus Torvalds <torvalds@linux-foundation.org>
Mon, 4 Jun 2012 03:05:57 +0000 (20:05 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 4 Jun 2012 03:05:57 +0000 (20:05 -0700)
commit68e3e92620c323703bc7db75c2ba15239ee85c39
tree0a825d6f78e43d9ecc86429a99dcb40ed6628c25
parent752dc185dacba1edcba425e67fc6df3c7793a5c3
Revert "mm: compaction: handle incorrect MIGRATE_UNMOVABLE type pageblocks"

This reverts commit 5ceb9ce6fe9462a298bb2cd5c9f1ca6cb80a0199.

That commit seems to be the cause of the mm compation list corruption
issues that Dave Jones reported.  The locking (or rather, absense
there-of) is dubious, as is the use of the 'page' variable once it has
been found to be outside the pageblock range.

So revert it for now, we can re-visit this for 3.6.  If we even need to:
as Minchan Kim says, "The patch wasn't a bug fix and even test workload
was very theoretical".

Reported-and-tested-by: Dave Jones <davej@redhat.com>
Acked-by: Hugh Dickins <hughd@google.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/compaction.h
mm/compaction.c
mm/internal.h
mm/page_alloc.c