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Date: Fri, 18 Jul 2014 11:37:43 +0100 From: Steven Whitehouse <swhiteho@...hat.com> To: linux-kernel@...r.kernel.org, cluster-devel@...hat.com Cc: Bob Peterson <rpeterso@...hat.com>, Steven Whitehouse <swhiteho@...hat.com> Subject: [PATCH 6/8] GFS2: Allow caching of glocks for flock From: Bob Peterson <rpeterso@...hat.com> This patch removes the GLF_NOCACHE flag from the glocks associated with flocks. There should be no good reason not to cache glocks for flocks: they only force the glock to be demoted before they can be reacquired, which can slow down performance and even cause glock hangs, especially in cases where the flocks are held in Shared (SH) mode. Signed-off-by: Bob Peterson <rpeterso@...hat.com> Signed-off-by: Steven Whitehouse <swhiteho@...hat.com> diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 491e8e0..26b3f95 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -981,7 +981,7 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl) int error = 0; state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED; - flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE; + flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT; mutex_lock(&fp->f_fl_mutex); -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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