ext4: check for need init flag in ext4_mb_load_buddy
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Thu, 10 Sep 2009 03:34:50 +0000 (23:34 -0400)
committerTheodore Ts'o <tytso@mit.edu>
Thu, 10 Sep 2009 03:34:50 +0000 (23:34 -0400)
commitf41c0750538667b87a19c93952e5d42fcc069bd7
tree042076950064d1201e7e408aba0e96ccbd7e00e2
parentb6a758ec3af3ec236dbfdcf6a06b84ac8f94957e
ext4: check for need init flag in ext4_mb_load_buddy

We should check for need init flag with the group's alloc_sem held, to
make sure while we are loading the buddy cache and holding a reference
to it, a file system resize can't add new blocks to same group.

The patch also drops the need init flag check in
ext4_mb_regular_allocator() because doing the check without holding
alloc_sem is racy.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
fs/ext4/mballoc.c