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authorCesar Eduardo Barros <cesarb@cesarb.net>2011-03-22 16:33:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 17:44:08 -0700
commit1421ef3cd15b87ef949e965efeb1e527479d3f75 (patch)
tree8bcc6d1047905b205a7061c00bda40197fad2328
parent38719025384cf7121331bd6d41c062d3c5f7bb91 (diff)
downloadop-kernel-dev-1421ef3cd15b87ef949e965efeb1e527479d3f75.zip
op-kernel-dev-1421ef3cd15b87ef949e965efeb1e527479d3f75.tar.gz
sys_swapon: call swap_cgroup_swapon() earlier
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>
-rw-r--r--mm/swapfile.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 058a9df..10f2b33 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -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;
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