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gfs2: use workqueue instead of slow-work

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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>
This commit is contained in:
Tejun Heo
2010-07-20 22:09:02 +02:00
parent 991ea75cb1
commit 6ecd7c2dd9
7 changed files with 40 additions and 49 deletions
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6
fs/gfs2/recovery.h
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@@ -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 void gfs2_revoke_clean(struct gfs2_sbd *sdp);
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__ */