From: Andi Kleen <andi@firstfloor.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Kernel development list <linux-kernel@vger.kernel.org>,
AntonioLin <antonio.lin@alcormicro.com>,
David Vrabel <david.vrabel@csr.com>
Subject: Re: Scatter-gather list constraints
Date: Sun, 22 Jun 2008 01:00:57 +0200 [thread overview]
Message-ID: <485D8829.2060901@firstfloor.org> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0806211727330.24335-100000@netrider.rowland.org>
>> - Is it performance critical?
>
> For people using wireless USB drives, yes.
But only if there is a lot of 512 byte block IO? The only case I can think
of right now would be XFS log IO and perhaps some O_DIRECT/raw device
accesses.
Or how did you determine it is critical? Was there some important workload where
most of the requests had this form?
If it's only an relative oddball just copying is fine imho.
-Andi
next prev parent reply other threads:[~2008-06-21 23:01 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-20 20:30 Scatter-gather list constraints Alan Stern
2008-06-20 20:50 ` David Miller
2008-06-21 13:59 ` Andi Kleen
2008-06-21 14:54 ` Alan Stern
2008-06-21 15:21 ` Andi Kleen
2008-06-21 21:50 ` Alan Stern
2008-06-21 23:00 ` Andi Kleen [this message]
2008-06-22 14:35 ` Alan Stern
2008-06-24 10:41 ` FUJITA Tomonori
2008-06-24 14:57 ` Alan Stern
2008-06-25 0:18 ` FUJITA Tomonori
2008-06-25 14:23 ` Alan Stern
2008-06-26 2:06 ` FUJITA Tomonori
2008-06-26 5:39 ` FUJITA Tomonori
2008-06-26 6:35 ` Jens Axboe
2008-06-26 6:58 ` FUJITA Tomonori
2008-06-26 12:39 ` Jens Axboe
2008-06-26 12:54 ` Andi Kleen
2008-06-26 13:00 ` Jens Axboe
2008-06-26 15:12 ` Alan Stern
2008-06-26 17:41 ` Jens Axboe
2008-08-27 21:32 ` Alan Stern
2008-06-26 15:16 ` Boaz Harrosh
2008-06-26 17:39 ` Jens Axboe
2008-06-26 14:18 ` Alan Stern
2008-06-23 14:46 ` David Vrabel
2008-06-23 15:12 ` Alan Stern
2008-06-23 19:06 ` David Vrabel
2008-06-23 19:45 ` Alan Stern
2008-06-23 21:53 ` Stefan Richter
2008-06-25 4:02 ` Perez-Gonzalez, Inaky
2008-06-25 14:24 ` Alan Stern
2008-06-26 16:43 ` Perez-Gonzalez, Inaky
2008-06-26 19:34 ` Alan Stern
2008-06-26 22:39 ` Inaky Perez-Gonzalez
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