From 74d58df8b2ba860c8b0521d882693efcac3af8d1 Mon Sep 17 00:00:00 2001
From: anserper <anserper>
Date: Tue, 14 Apr 2009 00:02:35 +0000
Subject: [PATCH] b=18728 i=Alex Zhuravlev i=Alexander Zarochentsev

decrease response time for write-waiting threads
---
 lustre/llite/file.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lustre/llite/file.c b/lustre/llite/file.c
index b493fbe..07d7814 100644
--- a/lustre/llite/file.c
+++ b/lustre/llite/file.c
@@ -1683,7 +1683,9 @@ static ssize_t ll_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 
         LASSERT(ll_i2info(inode)->lli_smd != NULL);
 
-        down(&ll_i2info(inode)->lli_write_sem);
+        /* signal(7) specifies that write(2) and writev(2) should be restarted */
+        if (down_interruptible(&ll_i2info(inode)->lli_write_sem))
+                RETURN(-ERESTARTSYS);
 
 repeat:
         chunk = 0; /* just to fix gcc's warning */
-- 
1.8.3.1