From: anserper <anserper>
Date: Tue, 14 Apr 2009 00:04:32 +0000 (+0000)
Subject: b=18728
X-Git-Tag: v1_8_0_110~102
X-Git-Url: https://git.whamcloud.com/gitweb?a=commitdiff_plain;h=98351e8435e3ab7acc325ed0afb278fb5f5bafd5;p=fs%2Flustre-release.git

b=18728
i=Alex Zhuravlev
i=Alexander Zarochentsev

decrease response time for write-waiting threads
---

diff --git a/lustre/llite/file.c b/lustre/llite/file.c
index 7949e69..2704e63 100644
--- a/lustre/llite/file.c
+++ b/lustre/llite/file.c
@@ -1715,7 +1715,9 @@ 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 */