diff options
| author | Ed Cashin <ecashin@coraid.com> | 2012-10-04 17:16:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-06 03:05:25 +0900 |
| commit | 69cf2d85de773d998798e47e3335b85e5645d157 (patch) | |
| tree | 765eb2be45726e7e098fe73b7f368239c0461342 /drivers/block/aoe/aoechr.c | |
| parent | 896831f5909e2733c13c9cb13a1a215f10c3eaa8 (diff) | |
aoe: become I/O request queue handler for increased user control
To allow users to choose an elevator algorithm for their particular
workloads, change from a make_request-style driver to an
I/O-request-queue-handler-style driver.
We have to do a couple of things that might be surprising. We manipulate
the page _count directly on the assumption that we still have no guarantee
that users of the block layer are prohibited from submitting bios
containing pages with zero reference counts.[1] If such a prohibition now
exists, I can get rid of the _count manipulation.
Just as before this patch, we still keep track of the sk_buffs that the
network layer still hasn't finished yet and cap the resources we use with
a "pool" of skbs.[2]
Now that the block layer maintains the disk stats, the aoe driver's
diskstats function can go away.
1. https://lkml.org/lkml/2007/3/1/374
2. https://lkml.org/lkml/2007/7/6/241
Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block/aoe/aoechr.c')
| -rw-r--r-- | drivers/block/aoe/aoechr.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/block/aoe/aoechr.c b/drivers/block/aoe/aoechr.c index f145388cb94..3557f0d04b4 100644 --- a/drivers/block/aoe/aoechr.c +++ b/drivers/block/aoe/aoechr.c @@ -106,6 +106,7 @@ loop: spin_lock_irqsave(&d->lock, flags); goto loop; } + aoedev_put(d); if (skb) { struct sk_buff_head queue; __skb_queue_head_init(&queue); |