xfs: fallback to vmalloc for large buffers in xfs_compat_attrlist_by_handle
authorEric Sandeen <sandeen@sandeen.net>
Thu, 25 Apr 2013 16:13:06 +0000 (11:13 -0500)
committerBen Myers <bpm@sgi.com>
Wed, 8 May 2013 00:00:10 +0000 (19:00 -0500)
commit7dfbcbefad4b24d9822d04dbd7b5dd5c3fd45076
tree9b993f704d23a9678380171e6870306d34541afb
parentdd700d9452023a5b6820815a88f93c8f7010c270
xfs: fallback to vmalloc for large buffers in xfs_compat_attrlist_by_handle

Shamelessly copied from dchinner's:
ad650f5b xfs: fallback to vmalloc for large buffers in xfs_attrmulti_attr_get

xfsdump uses a large buffer for extended attributes, which has a
kmalloc'd shadow buffer in the kernel. This can fail after the
system has been running for some time as it is a high order
allocation. Add a fallback to vmalloc so that it doesn't require
contiguous memory and so won't randomly fail while xfsdump is
running.

This was done for xfs_attrlist_by_handle but
xfs_compat_attrlist_by_handle (the 32-bit version) needs the same
attention.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
fs/xfs/xfs_ioctl32.c