tree ea0ea08edbc6f4f0644faca5e8c3a29a68f71c51
parent 9dcc26cf67fb7db7613290e62eeed6c4276c75ce
author Jan Kara <jack@suse.cz> 1367619083 +0200
committer Al Viro <viro@zeniv.linux.org.uk> 1367693878 -0400

fs: Fix hang with BSD accounting on frozen filesystem

When BSD process accounting is enabled and logs information to a
filesystem which gets frozen, system easily becomes unusable because
each attempt to account process information blocks. Thus e.g. every task
gets blocked in exit.

It seems better to drop accounting information (which can already happen
when filesystem is running out of space) instead of locking system up.
So we just skip the write if the filesystem is frozen.

Reported-by: Nikola Ciprich <nikola.ciprich@linuxbox.cz>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>