Commit ca9248d8 authored Apr 10, 2012 by Bob Peterson Committed by Steven Whitehouse Apr 10, 2012

GFS2: Allow caching of rindex glock



This patch allows caching of the rindex glock. We were previously
setting the GL_NOCACHE bit when the glock was released. That forced
the rindex inode to be invalidated, which caused us to re-read
rindex at the next access. However, it caused the glock to be
unnecessarily bounced around the cluster. This patch allows
the glock to remain cached, but it still causes the rindex to be
re-read once it has been written to by gfs2_grow.

Ben and I have tested single-node gfs2_grow cases and I've tested
clustered gfs2_grow cases on my four-node cluster.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

parent 5e2f7d61

fs/gfs2/aops.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -807,7 +807,7 @@ static int gfs2_stuffed_write_end(struct inode inode, struct buffer_head dibh,

		if (inode == sdp->sd_rindex) {
		adjust_fs_space(inode);
		ip->i_gh.gh_flags \|= GL_NOCACHE;
		sdp->sd_rindex_uptodate = 0;
		}

		brelse(dibh);
		@@ -873,7 +873,7 @@ static int gfs2_write_end(struct file file, struct address_space mapping,

		if (inode == sdp->sd_rindex) {
		adjust_fs_space(inode);
		ip->i_gh.gh_flags \|= GL_NOCACHE;
		sdp->sd_rindex_uptodate = 0;
		}

		brelse(dibh);

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