Searched hist:"635697 c663f38106063d5659f0cf2e45afcd4bb5" (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/mm/ |
| H A D | vmscan.c | diff 635697c663f38106063d5659f0cf2e45afcd4bb5 Thu Dec 08 16:33:51 CST 2011 Konstantin Khlebnikov <khlebnikov@openvz.org> vmscan: fix initial shrinker size handling
A shrinker function can return -1, means that it cannot do anything
without a risk of deadlock. For example prune_super() does this if it
cannot grab a superblock refrence, even if nr_to_scan=0. Currently we
interpret this -1 as a ULONG_MAX size shrinker and evaluate `total_scan'
according to this. So the next time around this shrinker can cause
really big pressure. Let's skip such shrinkers instead.
Also make total_scan signed, otherwise the check (total_scan < 0) below
never works.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|