Re: [PATCH 02/11] block: kill QUEUE_ORDERED_BY_TAG | KernelTrap

Re: [PATCH 02/11] block: kill QUEUE_ORDERED_BY_TAG

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From: Vladislav Bolkhovitin

Subject: Re: [PATCH 02/11] block: kill QUEUE_ORDERED_BY_TAG

Date: Friday, August 13, 2010 - 5:56 am

Hello Tejun,

Tejun Heo, on 08/12/2010 04:41 PM wrote:
quoted text> Nobody is making meaningful use of ORDERED_BY_TAG now and queue
> draining for barrier requests will be removed soon which will render
> the advantage of tag ordering moot.

Have you seen Hannes Reinecke's and my measurements in 
http://marc.info/?l=linux-scsi&m=128110662528485&w=2 and 
http://marc.info/?l=linux-scsi&m=128111995217405&w=2 correspondingly?

If yes, what else evidences do you need to see that the tag ordering is 
a big performance win?

Vlad
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Messages in current thread:

[PATCHSET block#for-2.6.36-post] block: replace barrier wi ..., Tejun Heo, (Thu Aug 12, 5:41 am)

[PATCH 01/11] block/loop: queue ordered mode should be DRA ..., Tejun Heo, (Thu Aug 12, 5:41 am)

[PATCH 02/11] block: kill QUEUE_ORDERED_BY_TAG, Tejun Heo, (Thu Aug 12, 5:41 am)

[PATCH 03/11] block: deprecate barrier and replace blk_que ..., Tejun Heo, (Thu Aug 12, 5:41 am)

[PATCH 04/11] block: remove spurious uses of REQ_HARDBARRIER, Tejun Heo, (Thu Aug 12, 5:41 am)

[PATCH 05/11] block: misc cleanups in barrier code, Tejun Heo, (Thu Aug 12, 5:41 am)

[PATCH 06/11] block: drop barrier ordering by queue draining, Tejun Heo, (Thu Aug 12, 5:41 am)

[PATCH 07/11] block: rename blk-barrier.c to blk-flush.c, Tejun Heo, (Thu Aug 12, 5:41 am)

[PATCH 08/11] block: rename barrier/ordered to flush, Tejun Heo, (Thu Aug 12, 5:41 am)

[PATCH 09/11] block: implement REQ_FLUSH/FUA based interfa ..., Tejun Heo, (Thu Aug 12, 5:41 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Fri Aug 13, 4:48 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Vladislav Bolkhovitin, (Fri Aug 13, 5:55 am)

Re: [PATCH 02/11] block: kill QUEUE_ORDERED_BY_TAG, Vladislav Bolkhovitin, (Fri Aug 13, 5:56 am)

Re: [PATCH 02/11] block: kill QUEUE_ORDERED_BY_TAG, Christoph Hellwig, (Fri Aug 13, 6:06 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Fri Aug 13, 6:17 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Fri Aug 13, 6:21 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Fri Aug 13, 6:48 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Fri Aug 13, 7:38 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Fri Aug 13, 7:51 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Sat Aug 14, 3:36 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Tue Aug 17, 2:59 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Tue Aug 17, 6:19 am)

Re: [PATCH 08/11] block: rename barrier/ordered to flush, Christoph Hellwig, (Tue Aug 17, 6:26 am)

Re: [PATCH 08/11] block: rename barrier/ordered to flush, Tejun Heo, (Tue Aug 17, 9:23 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Tue Aug 17, 9:41 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Tue Aug 17, 9:59 am)

Re: [PATCH 08/11] block: rename barrier/ordered to flush, Christoph Hellwig, (Tue Aug 17, 10:08 am)

Re: [PATCH 08/11] block: rename barrier/ordered to flush, Tejun Heo, (Tue Aug 17, 11:23 pm)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Tue Aug 17, 11:35 pm)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Wed Aug 18, 1:11 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Wed Aug 18, 2:46 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Vladislav Bolkhovitin, (Wed Aug 18, 12:29 pm)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Vladislav Bolkhovitin, (Wed Aug 18, 12:30 pm)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Thu Aug 19, 2:51 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Thu Aug 19, 2:57 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Thu Aug 19, 3:20 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Thu Aug 19, 3:22 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Kiyoshi Ueda, (Fri Aug 20, 1:26 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Fri Aug 20, 6:22 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Ric Wheeler, (Fri Aug 20, 8:18 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Chris Mason, (Fri Aug 20, 9:00 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Ric Wheeler, (Fri Aug 20, 9:02 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Mon Aug 23, 5:14 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Mon Aug 23, 5:30 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Mon Aug 23, 5:36 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Mon Aug 23, 5:48 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Ric Wheeler, (Mon Aug 23, 6:58 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Mon Aug 23, 7:05 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Mon Aug 23, 7:08 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Mon Aug 23, 7:13 am)

[PATCH] block: simplify queue_next_fseq, Christoph Hellwig, (Mon Aug 23, 7:15 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Mike Snitzer, (Mon Aug 23, 7:17 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Christoph Hellwig, (Mon Aug 23, 7:19 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Ric Wheeler, (Mon Aug 23, 8:19 am)

OT grammar nit Re: [PATCH] block: simplify queue_next_fseq, John Robinson, (Mon Aug 23, 9:28 am)

Re: [dm-devel] [PATCHSET block#for-2.6.36-post] block: rep ..., Sergey Vlasov, (Mon Aug 23, 9:45 am)

Re: [dm-devel] [PATCHSET block#for-2.6.36-post] block: rep ..., Ric Wheeler, (Mon Aug 23, 9:49 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Kiyoshi Ueda, (Tue Aug 24, 3:24 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Vladislav Bolkhovitin, (Tue Aug 24, 10:11 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Mike Snitzer, (Tue Aug 24, 10:52 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Tejun Heo, (Tue Aug 24, 11:14 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Kiyoshi Ueda, (Wed Aug 25, 1:00 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Jens Axboe, (Wed Aug 25, 4:31 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Mike Snitzer, (Wed Aug 25, 8:28 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Kiyoshi Ueda, (Fri Aug 27, 2:47 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Mike Snitzer, (Fri Aug 27, 6:49 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Hannes Reinecke, (Mon Aug 30, 2:54 am)

Re: [PATCHSET block#for-2.6.36-post] block: replace barrie ..., Vladislav Bolkhovitin, (Mon Aug 30, 1:34 pm)

safety of retrying SYNCHRONIZE CACHE [was: Re: [PATCHSET b ..., Mike Snitzer, (Tue Aug 31, 5:55 pm)

Re: safety of retrying SYNCHRONIZE CACHE [was: Re: [PATCHS ..., Hannes Reinecke, (Wed Sep 1, 12:32 am)

Re: safety of retrying SYNCHRONIZE CACHE [was: Re: [PATCHS ..., Hannes Reinecke, (Wed Sep 1, 12:38 am)

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