From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/1] block: blk-merge: don't merge the pages with non-contiguous descriptors
Date: Thu, 17 Jan 2013 11:04:38 +0000 [thread overview]
Message-ID: <20130117110438.GZ23505@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1358420507.2394.19.camel@dabdike.int.hansenpartnership.com>
On Thu, Jan 17, 2013 at 11:01:47AM +0000, James Bottomley wrote:
> On Thu, 2013-01-17 at 10:47 +0000, Russell King - ARM Linux wrote:
> > Also, couldn't the addition of the scatterlist offset to the page also
> > be buggy too?
>
> No, fortunately, offset must be within the first page from the point of
> view of block generated sg lists. As long as nothing within arm
> violates this, it should be a safe assumption ... although the code
> seems to assume otherwise.
Are you absolutely sure about that? I believe I have seen cases where
that has been violated in the past, though it was many years ago.
next prev parent reply other threads:[~2013-01-17 11:04 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1358265681-25671-1-git-send-email-subhashj@codeaurora.org>
[not found] ` <1358266794.10591.8.camel@dabdike.int.hansenpartnership.com>
[not found] ` <50F64AC1.3040304@codeaurora.org>
2013-01-16 10:32 ` [PATCH v2 1/1] block: blk-merge: don't merge the pages with non-contiguous descriptors James Bottomley
2013-01-16 12:39 ` Subhash Jadavani
2013-01-16 12:47 ` ARM DMA: Fix in dma_cache_maint_page Subhash Jadavani
2013-01-16 12:51 ` James Bottomley
2013-01-16 13:08 ` Russell King - ARM Linux
2013-01-16 15:50 ` James Bottomley
2013-01-16 23:14 ` [PATCH v2 1/1] block: blk-merge: don't merge the pages with non-contiguous descriptors Russell King - ARM Linux
2013-01-17 8:54 ` James Bottomley
2013-01-16 23:18 ` Tejun Heo
2013-01-17 9:11 ` James Bottomley
2013-01-17 10:37 ` Russell King - ARM Linux
2013-01-17 10:47 ` Russell King - ARM Linux
2013-01-17 11:01 ` James Bottomley
2013-01-17 11:04 ` Russell King - ARM Linux [this message]
2013-01-17 11:19 ` James Bottomley
2013-01-17 11:40 ` Russell King - ARM Linux
2013-01-17 14:58 ` Subhash Jadavani
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