From: Mark Lord <lkml@rtr.ca>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org, mason@suse.com,
andrea@suse.de, hugh@veritas.com, axboe@suse.de
Subject: Re: [rfc][patch] remove racy sync_page?
Date: Tue, 30 May 2006 21:33:06 -0400 [thread overview]
Message-ID: <447CF252.7010704@rtr.ca> (raw)
In-Reply-To: <Pine.LNX.4.64.0605301739030.24646@g5.osdl.org>
Linus wrote:
> (Yes, tagged queueing makes it less of an issue, of course. I know,
My observations with (S)ATA tagged/native queuing, is that it doesn't make
nearly the difference under Linux that it does under other OSs.
Probably because our block layer is so good at ordering requests,
either from plugging or simply from clever disk scheduling.
> I know. But I _think_ a lot of disks will start seeking for an incoming
> command the moment they see it, just to get the best latency, rather than
> wait a millisecond or two to see if they get another request. So even
> with tagged queuing, the elevator can help, _especially_ for the initial
> request).
Yup. Agreed!
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next prev parent reply other threads:[~2006-05-31 1:33 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-29 9:34 Nick Piggin
2006-05-29 19:15 ` Andrew Morton
2006-05-30 0:08 ` Nick Piggin
2006-05-30 1:32 ` Andrew Morton
2006-05-30 2:54 ` Nick Piggin
2006-05-30 3:14 ` Andrew Morton
2006-05-30 4:13 ` Nick Piggin
2006-05-30 9:05 ` Jens Axboe
2006-05-31 13:43 ` Nick Piggin
2006-05-31 15:09 ` Hugh Dickins
2006-05-31 15:22 ` Nick Piggin
2006-05-31 17:51 ` Jens Axboe
2006-05-31 17:50 ` Jens Axboe
2006-05-30 4:20 ` Linus Torvalds
2006-05-30 5:07 ` Nick Piggin
2006-05-30 5:21 ` Nick Piggin
2006-05-30 6:12 ` Neil Brown
2006-05-30 7:10 ` Nick Piggin
2006-05-31 4:34 ` Neil Brown
2006-05-30 8:24 ` Nikita Danilov
2006-05-30 17:55 ` Linus Torvalds
2006-05-31 0:32 ` Nick Piggin
2006-05-31 0:56 ` Linus Torvalds
2006-05-31 1:33 ` Mark Lord [this message]
2006-05-31 6:11 ` Jens Axboe
2006-05-31 12:55 ` Mark Lord
2006-05-31 13:02 ` Jens Axboe
2006-06-01 13:19 ` NCQ performance (was Re: [rfc][patch] remove racy sync_page?) Jens Axboe
2006-06-01 14:56 ` Avi Kivity
2006-06-01 15:03 ` Jens Axboe
2006-06-01 18:04 ` Jens Axboe
2006-06-05 5:30 ` Avi Kivity
2006-06-05 7:59 ` Jens Axboe
2006-05-31 12:31 ` [rfc][patch] remove racy sync_page? Helge Hafting
2006-05-31 12:36 ` Arjan van de Ven
2006-05-31 13:29 ` Nick Piggin
2006-05-31 13:41 ` Jens Axboe
2006-05-31 13:54 ` Nick Piggin
2006-05-31 14:43 ` Linus Torvalds
2006-05-31 14:57 ` Nick Piggin
2006-05-31 15:13 ` Linus Torvalds
2006-05-31 15:09 ` Linus Torvalds
2006-05-31 18:13 ` Jens Axboe
2006-05-31 18:26 ` Linus Torvalds
2006-05-30 5:36 ` Nick Piggin
2006-05-30 18:31 ` Hugh Dickins
2006-05-31 0:21 ` Nick Piggin
2006-05-31 3:06 ` Hugh Dickins
2006-05-31 14:30 ` Hugh Dickins
2006-05-31 17:56 ` Jens Axboe
2006-05-30 5:51 ` Josef Sipek
2006-05-30 6:44 ` Nick Piggin
2006-05-30 6:50 ` Nick Piggin
2006-05-30 13:12 ` Josef Sipek
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