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Date: Mon, 23 Jul 2007 13:54:16 -0700 From: Christoph Lameter <clameter@....com> To: Hugh Dickins <hugh@...itas.com> Cc: Jens Axboe <jens.axboe@...cle.com>, linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, Adam Litke <agl@...ibm.com>, David Gibson <david@...son.dropbear.id.au>, Ken Chen <kenchen@...gle.com>, Bill Irwin <wli@...omorphy.com> Subject: Re: [PATCH] Check for compound pages in set_page_dirty() On Thu, 19 Jul 2007 18:35:17 +0100 (BST) Hugh Dickins <hugh@...itas.com> wrote: > I didn't see any attention to set_page_dirty in Christoph's > Large Blocksize (variable page_cachesize) patches, but I expect > he'd also be wanting set_page_dirty to act on compound_head. There is no need for special casing if set_page_dirty() is only ever called for page heads. Make sure that direct I/O does not call set_page_dirty for tail pages. A VM_BUG_ON(PageTail(page)) could be used to make sure that this does not happen in the future? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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