Messages in this thread |  | | Date | Thu, 17 Jan 2013 11:04:38 +0000 | From | Russell King - ARM Linux <> | Subject | Re: [PATCH v2 1/1] block: blk-merge: don't merge the pages with non-contiguous descriptors |
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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.
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