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[PATCH] VM: fix zone list restart in page allocatate

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We must reassign z before looping through the zones kicking kswapd,
since it will be NULL if we hit an OOM condition and jump back to the
beginning again. 'z' is initially assigned before the restart: label. So
move the restart label up a little.

Signed-off-by: Jens Axboe <axboe@suse.de>
This commit is contained in:
Jens Axboe 2005-11-17 21:35:02 +01:00 committed by Linus Torvalds
parent bb83398667
commit 6b1de9161e
1 changed files with 4 additions and 3 deletions
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7
mm/page_alloc.c
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@ -845,21 +845,22 @@ __alloc_pages(gfp_t gfp_mask, unsigned int order,
might_sleep_if(wait);
restart:
z = zonelist->zones; /* the list of zones suitable for gfp_mask */
if (unlikely(*z == NULL)) {
/* Should this ever happen?? */
return NULL;
}
restart:
page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, order,
zonelist, ALLOC_CPUSET);
if (page)
goto got_pg;
do
do {
wakeup_kswapd(*z, order);
while (*(++z));
} while (*(++z));
/*
* OK, we're below the kswapd watermark and have kicked background