FAQ Search Today's Posts Mark Forums Read
» Video Reviews

» Linux Archive

Linux-archive is a website aiming to archive linux email lists and to make them easily accessible for linux users/developers.


» Sponsor

» Partners

» Sponsor

Go Back   Linux Archive > Redhat > Device-mapper Development

 
 
LinkBack Thread Tools
 
Old 12-12-2007, 02:25 PM
"Miller, Mike (OS Dev)"
 
Default blk_end_request: changing cciss (take 4)

>
> This patch converts cciss to use blk_end_request interfaces.
> Related 'uptodate' arguments are converted to 'error'.
>
> cciss is a little bit different from "normal" drivers.
> cciss directly calls bio_endio() and disk_stat_add() when
> completing request. But those can be replaced with
> __end_that_request_first().
> After the replacement, request completion procedures of those
> drivers become like the following:
> o end_that_request_first()
> o add_disk_randomness()
> o end_that_request_last()
> This can be converted to blk_end_request() by following the
> rule (a) mentioned in the patch subject "[PATCH 01/30]
> blk_end_request: add new request completion interface".
>
> Cc: Mike Miller <mike.miller@hp.com>
> Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
> ---
> drivers/block/cciss.c | 25 +++----------------------
> 1 files changed, 3 insertions(+), 22 deletions(-)
>
> Index: 2.6.24-rc4/drivers/block/cciss.c
> ================================================== =================
> --- 2.6.24-rc4.orig/drivers/block/cciss.c
> +++ 2.6.24-rc4/drivers/block/cciss.c
> @@ -1187,17 +1187,6 @@ static int cciss_ioctl(struct inode *ino
> }
> }
>
> -static inline void complete_buffers(struct bio *bio, int status) -{
> - while (bio) {
> - struct bio *xbh = bio->bi_next;
> -
> - bio->bi_next = NULL;
> - bio_endio(bio, status ? 0 : -EIO);
> - bio = xbh;
> - }
> -}
> -
> static void cciss_check_queues(ctlr_info_t *h) {
> int start_queue = h->next_to_run; @@ -1263,21
> +1252,14 @@ static void cciss_softirq_done(struct re
> pci_unmap_page(h->pdev, temp64.val,
> cmd->SG[i].Len, ddir);
> }
>
> - complete_buffers(rq->bio, (rq->errors == 0));
> -
> - if (blk_fs_request(rq)) {
> - const int rw = rq_data_dir(rq);
> -
> - disk_stat_add(rq->rq_disk, sectors[rw],
> rq->nr_sectors);
> - }
> -
> #ifdef CCISS_DEBUG
> printk("Done with %p
", rq);
> #endif /* CCISS_DEBUG */
>
> - add_disk_randomness(rq->rq_disk);
> + if (blk_end_request(rq, (rq->errors == 0) ? 0 : -EIO,
> blk_rq_bytes(rq)))
> + BUG();
> +
> spin_lock_irqsave(&h->lock, flags);
> - end_that_request_last(rq, (rq->errors == 0));
> cmd_free(h, cmd, 1);
> cciss_check_queues(h);
> spin_unlock_irqrestore(&h->lock, flags); @@ -2544,7
> +2526,6 @@ after_error_processing:
> }
> cmd->rq->data_len = 0;
> cmd->rq->completion_data = cmd;
> - blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);

Why is this removed?

-- mikem

> blk_complete_request(cmd->rq);
> }
>
>

--
dm-devel mailing list
dm-devel@redhat.com
https://www.redhat.com/mailman/listinfo/dm-devel
 
Old 12-12-2007, 04:27 PM
Kiyoshi Ueda
 
Default blk_end_request: changing cciss (take 4)

Hi Mike,

On Wed, 12 Dec 2007 15:25:10 +0000, "Miller, Mike (OS Dev)" <Mike.Miller@hp.com> wrote:
> > Index: 2.6.24-rc4/drivers/block/cciss.c
> > ================================================== =================
> > --- 2.6.24-rc4.orig/drivers/block/cciss.c
> > +++ 2.6.24-rc4/drivers/block/cciss.c
snip
> > +2526,6 @@ after_error_processing:
> > }
> > cmd->rq->data_len = 0;
> > cmd->rq->completion_data = cmd;
> > - blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);
>
> Why is this removed?

Sorry for the less explanation.

Because it is done in __end_that_request_first() called from
blk_end_request().
I'll add the explanation to the patch description when I update
the patch.

Thanks,
Kiyoshi Ueda

--
dm-devel mailing list
dm-devel@redhat.com
https://www.redhat.com/mailman/listinfo/dm-devel
 
Old 12-12-2007, 06:06 PM
"Miller, Mike (OS Dev)"
 
Default blk_end_request: changing cciss (take 4)

> -----Original Message-----
> From: Kiyoshi Ueda [mailto:k-ueda@ct.jp.nec.com]
> Sent: Tuesday, December 11, 2007 4:50 PM
> To: jens.axboe@oracle.com
> Cc: linux-kernel@vger.kernel.org; linux-scsi@vger.kernel.org;
> linux-ide@vger.kernel.org; dm-devel@redhat.com;
> j-nomura@ce.jp.nec.com; k-ueda@ct.jp.nec.com; Miller, Mike (OS Dev)
> Subject: [PATCH 21/30] blk_end_request: changing cciss (take 4)
>
> This patch converts cciss to use blk_end_request interfaces.
> Related 'uptodate' arguments are converted to 'error'.
>
> cciss is a little bit different from "normal" drivers.
> cciss directly calls bio_endio() and disk_stat_add() when
> completing request. But those can be replaced with
> __end_that_request_first().
> After the replacement, request completion procedures of those
> drivers become like the following:
> o end_that_request_first()
> o add_disk_randomness()
> o end_that_request_last()
> This can be converted to blk_end_request() by following the
> rule (a) mentioned in the patch subject "[PATCH 01/30]
> blk_end_request: add new request completion interface".
>
> Cc: Mike Miller <mike.miller@hp.com>
> Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>

Acked-by: Mike Miller <mike.miller@hp.com>

> ---
> drivers/block/cciss.c | 25 +++----------------------
> 1 files changed, 3 insertions(+), 22 deletions(-)
>
> Index: 2.6.24-rc4/drivers/block/cciss.c
> ================================================== =================
> --- 2.6.24-rc4.orig/drivers/block/cciss.c
> +++ 2.6.24-rc4/drivers/block/cciss.c
> @@ -1187,17 +1187,6 @@ static int cciss_ioctl(struct inode *ino
> }
> }
>
> -static inline void complete_buffers(struct bio *bio, int status) -{
> - while (bio) {
> - struct bio *xbh = bio->bi_next;
> -
> - bio->bi_next = NULL;
> - bio_endio(bio, status ? 0 : -EIO);
> - bio = xbh;
> - }
> -}
> -
> static void cciss_check_queues(ctlr_info_t *h) {
> int start_queue = h->next_to_run; @@ -1263,21
> +1252,14 @@ static void cciss_softirq_done(struct re
> pci_unmap_page(h->pdev, temp64.val,
> cmd->SG[i].Len, ddir);
> }
>
> - complete_buffers(rq->bio, (rq->errors == 0));
> -
> - if (blk_fs_request(rq)) {
> - const int rw = rq_data_dir(rq);
> -
> - disk_stat_add(rq->rq_disk, sectors[rw],
> rq->nr_sectors);
> - }
> -
> #ifdef CCISS_DEBUG
> printk("Done with %p
", rq);
> #endif /* CCISS_DEBUG */
>
> - add_disk_randomness(rq->rq_disk);
> + if (blk_end_request(rq, (rq->errors == 0) ? 0 : -EIO,
> blk_rq_bytes(rq)))
> + BUG();
> +
> spin_lock_irqsave(&h->lock, flags);
> - end_that_request_last(rq, (rq->errors == 0));
> cmd_free(h, cmd, 1);
> cciss_check_queues(h);
> spin_unlock_irqrestore(&h->lock, flags); @@ -2544,7
> +2526,6 @@ after_error_processing:
> }
> cmd->rq->data_len = 0;
> cmd->rq->completion_data = cmd;
> - blk_add_trace_rq(cmd->rq->q, cmd->rq, BLK_TA_COMPLETE);
> blk_complete_request(cmd->rq);
> }
>
>

--
dm-devel mailing list
dm-devel@redhat.com
https://www.redhat.com/mailman/listinfo/dm-devel
 
Old 12-12-2007, 06:08 PM
"Miller, Mike (OS Dev)"
 
Default blk_end_request: changing cciss (take 4)

> >
> > Why is this removed?
>
> Sorry for the less explanation.
>
> Because it is done in __end_that_request_first() called from
> blk_end_request().
> I'll add the explanation to the patch description when I
> update the patch.
>

Thank you. I've Acked the patch.

-- mikem

--
dm-devel mailing list
dm-devel@redhat.com
https://www.redhat.com/mailman/listinfo/dm-devel
 

Thread Tools




All times are GMT. The time now is 04:23 PM.

VBulletin, Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2007, Crawlability, Inc.
Copyright 2007 - 2008, www.linux-archive.org