From: Jeff Garzik <jgarzik@pobox.com>
To: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
axboe@suse.de, albertcc@tw.ibm.com, forrest.zhao@intel.com,
efalk@google.com, linux-ide@vger.kernel.org
Subject: Re: [PATCH 02/11] libata-eh: implement ata_ering
Date: Mon, 15 May 2006 14:22:03 -0400 [thread overview]
Message-ID: <4468C6CB.5090504@pobox.com> (raw)
In-Reply-To: <44689BFA.2020705@gmail.com>
Tejun Heo wrote:
> Alan Cox wrote:
>>> little bit more complex (it has more moving parts) and it would be
>>> difficult to define/tune speed down or any other error handling (say,
>>> turning off NCQ) criteria. But, I might be planning too much.
>> The log problem is that you can get 32 errors very fast (doesn't take
>> much with multiple outstanding commands)
>
> The current EH implementation records one error per EH run. It just
> combines all failed commands and record it as single entry. As each EH
> run usually takes at least several seconds, 32 slots should give several
> minutes worth of history even if things are pretty bad.
>
>> so you have to choose which
>> info to throw away - the history or the detail in the commands
>
> Yeap. And I also agree that ering is pretty inefficient way to spend
> 512 bytes of memory.
Overall its not a huge issue. As long as we aren't constantly
allocating and freeing that 512 bytes...
Jeff
next prev parent reply other threads:[~2006-05-15 18:22 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-11 13:21 [PATCHSET 03/11] new EH implementation, take 3 Tejun Heo
2006-05-11 13:21 ` [PATCH 01/11] libata-eh: add ATA and libata flags for new EH Tejun Heo
2006-05-13 22:15 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 04/11] libata-eh: implement ata_eh_info and ata_eh_context Tejun Heo
2006-05-11 13:21 ` [PATCH 05/11] libata-eh: implement new EH Tejun Heo
2006-05-13 22:19 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 03/11] libata-eh: add per-dev ata_ering Tejun Heo
2006-05-11 13:21 ` [PATCH 02/11] libata-eh: implement ata_ering Tejun Heo
2006-05-13 22:16 ` Jeff Garzik
2006-05-13 23:36 ` Tejun Heo
2006-05-14 1:05 ` Jeff Garzik
2006-05-14 1:20 ` Tejun Heo
2006-05-14 1:32 ` Jeff Garzik
2006-05-14 1:38 ` Tejun Heo
2006-05-15 13:36 ` Alan Cox
2006-05-15 14:00 ` Tejun Heo
2006-05-15 14:25 ` Tejun Heo
2006-05-15 14:50 ` Alan Cox
2006-05-15 14:57 ` Tejun Heo
2006-05-15 15:19 ` Alan Cox
2006-05-15 15:19 ` Tejun Heo
2006-05-15 18:22 ` Jeff Garzik [this message]
2006-05-11 13:21 ` [PATCH 06/11] libata-eh: implement BMDMA EH Tejun Heo
2006-05-13 22:21 ` Jeff Garzik
2006-05-13 23:41 ` Tejun Heo
2006-05-15 13:38 ` Alan Cox
2006-05-15 13:59 ` Tejun Heo
2006-05-15 14:43 ` Alan Cox
2006-05-11 13:21 ` [PATCH 07/11] ata_piix: convert to new EH Tejun Heo
2006-05-13 22:23 ` Jeff Garzik
2006-05-11 13:21 ` [PATCH 08/11] sata_sil: " Tejun Heo
2006-05-11 14:22 ` Alan Cox
2006-05-11 14:39 ` Tejun Heo
2006-05-11 15:46 ` Alan Cox
2006-05-11 15:45 ` Tejun Heo
2006-05-11 16:12 ` Alan Cox
2006-05-11 16:10 ` Tejun Heo
2006-05-11 17:16 ` Alan Cox
2006-05-13 22:26 ` Jeff Garzik
2006-05-13 23:43 ` Tejun Heo
2006-05-11 13:21 ` [PATCH 10/11] ahci: add PIOS interim interrupt handling Tejun Heo
2006-05-11 13:21 ` [PATCH 11/11] sata_sil24: convert to new EH Tejun Heo
2006-05-11 13:21 ` [PATCH 09/11] ahci: " Tejun Heo
2006-05-13 10:53 ` Tejun Heo
2006-05-13 22:30 ` Jeff Garzik
2006-05-13 23:49 ` Tejun Heo
2006-05-13 22:34 ` [PATCHSET 03/11] new EH implementation, take 3 Jeff Garzik
2006-05-13 23:58 ` Tejun Heo
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