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From 34d651f7979e35fde9a4f77adc26a7e8c1e3e54a Mon Sep 17 00:00:00 2001
From: Dmitry Monakhov <dmonakhov@openvz.org>
Date: Tue, 10 Dec 2013 10:05:10 -0500
Subject: [PATCH] Modify pipe_write to first call sb_start_write_try() and upon
encountering a frozen fs, skip the time update. See kernel bug #65701 and
Gentoo Kernel bug #493002.
Signed-off-by: Mike Pagano <mpagano@gentoo.org>
---
fs/pipe.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/pipe.c b/fs/pipe.c
index 0e0752e..78fd0d0 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -663,10 +663,11 @@ out:
wake_up_interruptible_sync_poll(&pipe->wait, POLLIN | POLLRDNORM);
kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN);
}
- if (ret > 0) {
+ if (ret > 0 && sb_start_write_trylock(file_inode(filp)->i_sb)) {
int err = file_update_time(filp);
if (err)
ret = err;
+ sb_end_write(file_inode(filp)->i_sb);
}
return ret;
}
--
1.8.3.2
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