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authorSteven Whitehouse <swhiteho@redhat.com>2009-05-19 10:01:18 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2009-05-19 10:01:18 +0100
commitfe64d517df0970a68417184a12fcd4ba0589cc28 (patch)
treed977f214fdf6ba96254cfbf6683e8583ecebe504 /fs/gfs2/main.c
parent9582d41135c0d362f04ed6bf3dc8d693a7eafee2 (diff)
GFS2: Umount recovery race fix
This patch fixes a race condition where we can receive recovery requests part way through processing a umount. This was causing problems since the recovery thread had already gone away. Looking in more detail at the recovery code, it was really trying to implement a slight variation on a work queue, and that happens to align nicely with the recently introduced slow-work subsystem. As a result I've updated the code to use slow-work, rather than its own home grown variety of work queue. When using the wait_on_bit() function, I noticed that the wait function that was supplied as an argument was appearing in the WCHAN field, so I've updated the function names in order to produce more meaningful output. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/main.c')
-rw-r--r--fs/gfs2/main.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index a6892ed0840..eacd78a5d08 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/gfs2_ondisk.h>
#include <asm/atomic.h>
+#include <linux/slow-work.h>
#include "gfs2.h"
#include "incore.h"
@@ -113,12 +114,18 @@ static int __init init_gfs2_fs(void)
if (error)
goto fail_unregister;
+ error = slow_work_register_user();
+ if (error)
+ goto fail_slow;
+
gfs2_register_debugfs();
printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
return 0;
+fail_slow:
+ unregister_filesystem(&gfs2meta_fs_type);
fail_unregister:
unregister_filesystem(&gfs2_fs_type);
fail:
@@ -156,6 +163,7 @@ static void __exit exit_gfs2_fs(void)
gfs2_unregister_debugfs();
unregister_filesystem(&gfs2_fs_type);
unregister_filesystem(&gfs2meta_fs_type);
+ slow_work_unregister_user();
kmem_cache_destroy(gfs2_quotad_cachep);
kmem_cache_destroy(gfs2_rgrpd_cachep);