fs/buffer.c: add device information for error output in __find_get_block_slow()
commit72a2ebd8bc62e6658513d3b2a1119e91c3ea6810
authorTao Ma <boyu.mt@taobao.com>
Tue, 1 Nov 2011 00:09:00 +0000 (31 17:09 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 1 Nov 2011 00:30:49 +0000 (31 17:30 -0700)
treefb786e71f96ebb04bedc77f4eb3bbac41c15c6c5
parent584cff54e1ff8f59d5109dc8093efedff8bcc375
fs/buffer.c: add device information for error output in __find_get_block_slow()

On the ext4 mailing list[1], we got some report about errors in
__find_get_block_slow(), but the information is very limited.

If the device information is given, we can know the name of the sick
volume.  Futhermore, we can get the corresponding status of that
block(group, inode block etc) by analyzing the disk layout.

[1] http://marc.info/?l=linux-ext4&m=131379831421147&w=2

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/buffer.c