GFS2: Stop block extents at the end of bitmaps
authorBob Peterson <rpeterso@redhat.com>
Tue, 28 Aug 2012 12:45:56 +0000 (08:45 -0400)
committerSteven Whitehouse <swhiteho@redhat.com>
Mon, 24 Sep 2012 09:47:23 +0000 (10:47 +0100)
commit0688a5ecea61a36ba12d17a18ab9f8712145cfa2
treea33dcb7283fc30e334b4d9c2ba7b9f3513d0eedd
parentc743ffd09fa7d3464c6f74767a3ae2ca5dc3ebf7
GFS2: Stop block extents at the end of bitmaps

This patch stops multiple block allocations if a nonzero
return code is received from gfs2_rbm_from_block. Without
this patch, if enough pressure is put on the file system,
you get a kernel warning quickly followed by:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffffa04f47e8>] gfs2_alloc_blocks+0x2c8/0x880 [gfs2]
With this patch, things run normally.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
fs/gfs2/rgrp.c