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Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm

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* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm:
  dm: avoid destroying table in dm_any_congested
  dm: move pending queue wake_up end_io_acct
  dm mpath: warn if args ignored
  dm mpath: avoid attempting to activate null path
  dm stripe: fix init failure
  dm raid1: flush workqueue before destruction
This commit is contained in:
Linus Torvalds 2008-11-13 15:53:30 -08:00
commit 7e5b95f1ba
4 changed files with 31 additions and 16 deletions
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8
drivers/md/dm-mpath.c
View File

@ -441,13 +441,13 @@ static void process_queued_ios(struct work_struct *work)
__choose_pgpath(m);
pgpath = m->current_pgpath;
m->pgpath_to_activate = m->current_pgpath;
if ((pgpath && !m->queue_io) ||
(!pgpath && !m->queue_if_no_path))
must_queue = 0;
if (m->pg_init_required && !m->pg_init_in_progress) {
if (m->pg_init_required && !m->pg_init_in_progress && pgpath) {
m->pgpath_to_activate = pgpath;
m->pg_init_count++;
m->pg_init_required = 0;
m->pg_init_in_progress = 1;
@ -708,6 +708,10 @@ static int parse_hw_handler(struct arg_set *as, struct multipath *m)
m->hw_handler_name = NULL;
return -EINVAL;
}
if (hw_argc > 1)
DMWARN("Ignoring user-specified arguments for "
"hardware handler \"%s\"", m->hw_handler_name);
consume(as, hw_argc - 1);
return 0;

1
drivers/md/dm-raid1.c
View File

@ -1032,6 +1032,7 @@ static void mirror_dtr(struct dm_target *ti)
del_timer_sync(&ms->timer);
flush_workqueue(ms->kmirrord_wq);
flush_scheduled_work();
dm_kcopyd_client_destroy(ms->kcopyd_client);
destroy_workqueue(ms->kmirrord_wq);
free_context(ms, ti, ms->nr_mirrors);

4
drivers/md/dm-stripe.c
View File

@ -320,8 +320,10 @@ int __init dm_stripe_init(void)
int r;
r = dm_register_target(&stripe_target);
if (r < 0)
if (r < 0) {
DMWARN("target registration failed");
return r;
}
kstriped = create_singlethread_workqueue("kstriped");
if (!kstriped) {

34
drivers/md/dm.c
View File

@ -375,7 +375,7 @@ static void start_io_acct(struct dm_io *io)
dm_disk(md)->part0.in_flight = atomic_inc_return(&md->pending);
}
static int end_io_acct(struct dm_io *io)
static void end_io_acct(struct dm_io *io)
{
struct mapped_device *md = io->md;
struct bio *bio = io->bio;
@ -391,7 +391,9 @@ static int end_io_acct(struct dm_io *io)
dm_disk(md)->part0.in_flight = pending =
atomic_dec_return(&md->pending);
return !pending;
/* nudge anyone waiting on suspend queue */
if (!pending)
wake_up(&md->wait);
}
/*
@ -499,9 +501,7 @@ static void dec_pending(struct dm_io *io, int error)
spin_unlock_irqrestore(&io->md->pushback_lock, flags);
}
if (end_io_acct(io))
/* nudge anyone waiting on suspend queue */
wake_up(&io->md->wait);
end_io_acct(io);
if (io->error != DM_ENDIO_REQUEUE) {
blk_add_trace_bio(io->md->queue, io->bio,
@ -937,16 +937,24 @@ static void dm_unplug_all(struct request_queue *q)
static int dm_any_congested(void *congested_data, int bdi_bits)
{
int r;
struct mapped_device *md = (struct mapped_device *) congested_data;
struct dm_table *map = dm_get_table(md);
int r = bdi_bits;
struct mapped_device *md = congested_data;
struct dm_table *map;
if (!map || test_bit(DMF_BLOCK_IO, &md->flags))
r = bdi_bits;
else
r = dm_table_any_congested(map, bdi_bits);
atomic_inc(&md->pending);
if (!test_bit(DMF_BLOCK_IO, &md->flags)) {
map = dm_get_table(md);
if (map) {
r = dm_table_any_congested(map, bdi_bits);
dm_table_put(map);
}
}
if (!atomic_dec_return(&md->pending))
/* nudge anyone waiting on suspend queue */
wake_up(&md->wait);
dm_table_put(map);
return r;
}