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sys_swapon: call swap_cgroup_swapon() earlier

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The call to swap_cgroup_swapon is in the middle of loading the swap map
and extents. As it only does memory allocation and does not depend on
the swapfile layout (map/extents), it can be called earlier (or later).

Move it to just after the allocation of swap_map, since it is
conceptually similar (allocates a map).

Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Tested-by: Eric B Munson <emunson@mgebm.net>
Acked-by: Eric B Munson <emunson@mgebm.net>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Cesar Eduardo Barros 2011-03-22 16:33:31 -07:00 committed by Linus Torvalds
parent 3871902538
commit 1421ef3cd1
1 changed files with 4 additions and 4 deletions
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8
mm/swapfile.c
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@ -2074,6 +2074,10 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
goto bad_swap;
}
error = swap_cgroup_swapon(p->type, maxpages);
if (error)
goto bad_swap;
nr_good_pages = maxpages - 1; /* omit header page */
for (i = 0; i < swap_header->info.nr_badpages; i++) {
@ -2088,10 +2092,6 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
}
}
error = swap_cgroup_swapon(p->type, maxpages);
if (error)
goto bad_swap;
if (nr_good_pages) {
swap_map[0] = SWAP_MAP_BAD;
p->max = maxpages;