gfs2: use workqueue instead of slow-work
Workqueue can now handle high concurrency. Convert gfs to use
workqueue instead of slow-work.
* Steven pointed out that recovery path might be run from allocation
path and thus requires forward progress guarantee without memory
allocation. Create and use gfs_recovery_wq with rescuer. Please
note that forward progress wasn't guaranteed with slow-work.
* Updated to use non-reentrant workqueue.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/recovery.h b/fs/gfs2/recovery.h
index 1616ac2..2226136 100644
--- a/fs/gfs2/recovery.h
+++ b/fs/gfs2/recovery.h
@@ -12,6 +12,8 @@
#include "incore.h"
+extern struct workqueue_struct *gfs_recovery_wq;
+
static inline void gfs2_replay_incr_blk(struct gfs2_sbd *sdp, unsigned int *blk)
{
if (++*blk == sdp->sd_jdesc->jd_blocks)
@@ -27,8 +29,8 @@
extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
struct gfs2_log_header_host *head);
-extern int gfs2_recover_journal(struct gfs2_jdesc *gfs2_jd);
-extern struct slow_work_ops gfs2_recover_ops;
+extern int gfs2_recover_journal(struct gfs2_jdesc *gfs2_jd, bool wait);
+extern void gfs2_recover_func(struct work_struct *work);
#endif /* __RECOVERY_DOT_H__ */