From: Jeff Garzik <jgarzik@pobox.com>
To: Mark Lord <liml@rtr.ca>
Cc: linux-ide@vger.kernel.org
Subject: Re: [PATCH 2/7] sata_mv: deal with interrupt coalescing interrupts
Date: Sat, 20 May 2006 09:24:19 -0400 [thread overview]
Message-ID: <446F1883.9090601@pobox.com> (raw)
In-Reply-To: <446F160C.40204@rtr.ca>
Mark Lord wrote:
> Jeff Garzik wrote:
>> Applied, though I would like a follow-up which simply guarantees that
>> irq coalescing is off.
>
> Perhaps. I'm getting pressure to do the exact opposite from users
> of this chipset --> they'd like IRQ coalescing to be guaranteed to
> be turned *on*. Maybe a sysfs attr for it, with default == off ?
Yes, I should have been more clear. Support is fine, as long as the
default is off.
Unless you have a _lot_ of ports active at the same time, irq coalescing
can increase latency.
Ideally, for this, AHCI, and any other SATA controller that does
coalescing, we have a runtime dynamic trigger that turns on coalescing
when interrupt traffic exceeds a runtime limit.
Jeff
next prev parent reply other threads:[~2006-05-20 13:24 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-19 15:48 [PATCHSET 03/03] add hotplug support, take 3 Tejun Heo
2006-05-19 15:48 ` [PATCH 04/13] libata-hp: implement warmplug Tejun Heo
2006-05-19 15:48 ` [PATCH 08/13] ata_piix: convert ata_piix to new probing mechanism Tejun Heo
2006-05-19 15:48 ` [PATCH 06/13] libata-hp: implement bootplug Tejun Heo
2006-05-19 16:09 ` Jeff Garzik
2006-05-19 15:48 ` [PATCH 09/13] sata_sil: convert to new probing mechanism and add hotplug support Tejun Heo
2006-05-19 15:48 ` [PATCH 03/13] libata-hp: implement SCSI part of hotplug Tejun Heo
2006-05-19 16:05 ` Jeff Garzik
2006-05-23 14:52 ` Tejun Heo
2006-05-19 15:48 ` [PATCH 01/13] libata-hp: implement ata_eh_detach_dev() Tejun Heo
2006-05-19 15:48 ` [PATCH 07/13] libata-hp: implement unload-unplug Tejun Heo
2006-05-19 16:10 ` Jeff Garzik
2006-05-23 14:53 ` Tejun Heo
2006-05-19 15:48 ` [PATCH 05/13] libata-hp: hook warmplug Tejun Heo
2006-05-19 15:48 ` [PATCH 02/13] libata-hp: implement hotplug Tejun Heo
2006-05-19 16:04 ` Jeff Garzik
2006-05-19 15:48 ` [PATCH 12/13] libata-hp: killl ops->probe_reset Tejun Heo
2006-05-19 15:48 ` [PATCH 10/13] ahci: convert to new probing mechanism and add hotplug support Tejun Heo
2006-05-19 15:48 ` [PATCH 13/13] libata-hp: move ata_do_reset() to libata-eh.c Tejun Heo
2006-05-19 16:13 ` Jeff Garzik
2006-05-19 20:13 ` [PATCH 0/7] sata_mv: assorted fixes Mark Lord
2006-05-19 20:21 ` [PATCH 1/7] sata_mv: prevent unnecessary double-resets Mark Lord
2006-05-19 20:24 ` [PATCH 2/7] sata_mv: deal with interrupt coalescing interrupts Mark Lord
2006-05-20 4:32 ` Jeff Garzik
2006-05-20 13:13 ` Mark Lord
2006-05-20 13:24 ` Jeff Garzik [this message]
2006-05-20 14:01 ` Mark Lord
2006-05-22 6:35 ` Jeff Garzik
2006-05-19 20:29 ` [PATCH 3/7] sata_mv: chip initialization fixes Mark Lord
2006-05-19 20:33 ` [PATCH 4/7] sata_mv: spurious interrupt workaround Mark Lord
2006-05-19 20:36 ` [PATCH 5/7] sata_mv: remove local copy of queue indexes Mark Lord
2006-05-19 20:40 ` [PATCH 6/7] sata_mv: endian fix Mark Lord
2006-05-19 20:41 ` [PATCH 7/7] sata_mv: version bump Mark Lord
2006-05-19 15:48 ` [PATCH 11/13] sata_sil24: convert to new probing mechanism and add hotplug support Tejun Heo
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