Revert "Bias the placement of kernel pages at lower PFNs"
authorLinus Torvalds <torvalds@woody.linux-foundation.org>
Mon, 12 Nov 2007 22:14:44 +0000 (14:14 -0800)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Mon, 12 Nov 2007 22:14:44 +0000 (14:14 -0800)
commit44048d700bcbfaf4bcca6e2e0a73d89d01ec0878
tree975427ee367023b6e3a254519d5e5fdced2c0969
parente6a5c27f3b0fef72e528fc35e343af4b2db790ff
Revert "Bias the placement of kernel pages at lower PFNs"

This reverts commit 5adc5be7cd1bcef6bb64f5255d2a33f20a3cf5be.

Alexey Dobriyan reports that it causes huge slowdowns under some loads,
in his case a "mkfs.ext2" on a 30G partition.  With the placement bias,
the mkfs took over four minutes, with it reverted it's back to about ten
seconds for Alexey.

Reported-and-tested-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/page_alloc.c