diff options
| author | ecashin@coraid.com <ecashin@coraid.com> | 2005-04-19 07:00:22 +0200 |
|---|---|---|
| committer | Greg KH <greg@press.kroah.org> | 2005-04-19 07:00:22 +0200 |
| commit | a4b38364093bf2094ff858ad45f490521bb87984 (patch) | |
| tree | 474c8d5acc153eb1736c9a76be0973a32e5995f8 /drivers | |
| parent | [PATCH] aoe 11/12: add support for disk statistics (diff) | |
| download | linux-a4b38364093bf2094ff858ad45f490521bb87984.tar.xz linux-a4b38364093bf2094ff858ad45f490521bb87984.zip | |
[PATCH] aoe 12/12: send outgoing packets in order
I can't use list.h, since sk_buff doesn't have a list_head but instead
has two struct sk_buff pointers, and I want to avoid any extra memory
allocation.
send outgoing packets in order
Signed-off-by: Ed L. Cashin <ecashin@coraid.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/aoe/aoe.h | 3 | ||||
| -rw-r--r-- | drivers/block/aoe/aoeblk.c | 4 | ||||
| -rw-r--r-- | drivers/block/aoe/aoecmd.c | 26 |
3 files changed, 21 insertions, 12 deletions
diff --git a/drivers/block/aoe/aoe.h b/drivers/block/aoe/aoe.h index 2e92cfb4997c..aa8b547ffafa 100644 --- a/drivers/block/aoe/aoe.h +++ b/drivers/block/aoe/aoe.h @@ -131,7 +131,8 @@ struct aoedev { struct timer_list timer; spinlock_t lock; struct net_device *ifp; /* interface ed is attached to */ - struct sk_buff *skblist;/* packets needing to be sent */ + struct sk_buff *sendq_hd; /* packets needing to be sent, list head */ + struct sk_buff *sendq_tl; mempool_t *bufpool; /* for deadlock-free Buf allocation */ struct list_head bufq; /* queue of bios to work on */ struct buf *inprocess; /* the one we're currently working on */ diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c index a2735d975846..4780f7926d42 100644 --- a/drivers/block/aoe/aoeblk.c +++ b/drivers/block/aoe/aoeblk.c @@ -147,8 +147,8 @@ aoeblk_make_request(request_queue_t *q, struct bio *bio) list_add_tail(&buf->bufs, &d->bufq); aoecmd_work(d); - sl = d->skblist; - d->skblist = NULL; + sl = d->sendq_hd; + d->sendq_hd = d->sendq_tl = NULL; spin_unlock_irqrestore(&d->lock, flags); diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c index 60beb8db4612..b5be4b7d7b5b 100644 --- a/drivers/block/aoe/aoecmd.c +++ b/drivers/block/aoe/aoecmd.c @@ -178,8 +178,12 @@ aoecmd_ata_rw(struct aoedev *d, struct frame *f) skb = skb_prepare(d, f); if (skb) { - skb->next = d->skblist; - d->skblist = skb; + skb->next = NULL; + if (d->sendq_hd) + d->sendq_tl->next = skb; + else + d->sendq_hd = skb; + d->sendq_tl = skb; } } @@ -227,8 +231,12 @@ rexmit(struct aoedev *d, struct frame *f) skb = skb_prepare(d, f); if (skb) { - skb->next = d->skblist; - d->skblist = skb; + skb->next = NULL; + if (d->sendq_hd) + d->sendq_tl->next = skb; + else + d->sendq_hd = skb; + d->sendq_tl = skb; } } @@ -280,8 +288,8 @@ tdie: spin_unlock_irqrestore(&d->lock, flags); } } - sl = d->skblist; - d->skblist = NULL; + sl = d->sendq_hd; + d->sendq_hd = d->sendq_tl = NULL; if (sl) { n = d->rttavg <<= 1; if (n > MAXTIMER) @@ -481,8 +489,8 @@ aoecmd_ata_rsp(struct sk_buff *skb) aoecmd_work(d); - sl = d->skblist; - d->skblist = NULL; + sl = d->sendq_hd; + d->sendq_hd = d->sendq_tl = NULL; spin_unlock_irqrestore(&d->lock, flags); @@ -531,7 +539,7 @@ aoecmd_cfg(ushort aoemajor, unsigned char aoeminor) /* * Since we only call this in one place (and it only prepares one frame) - * we just return the skb. Usually we'd chain it up to the d->skblist. + * we just return the skb. Usually we'd chain it up to the aoedev sendq. */ static struct sk_buff * aoecmd_ata_id(struct aoedev *d) |