tree 7b20063513e534c5c13608df572c77c6975ff900
parent 6b0310fbf087ad6e9e3b8392adca97cd77184084
author Eric Sandeen <sandeen@redhat.com> 1273993200 -0400
committer Theodore Ts'o <tytso@mit.edu> 1273993200 -0400

ext4: stop issuing discards if not supported by device

Turn off issuance of discard requests if the device does
not support it - similar to the action we take for barriers.
This will save a little computation time if a non-discardable
device is mounted with -o discard, and also makes it obvious
that it's not doing what was asked at mount time ...

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>