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Date: Mon, 4 Dec 2006 23:38:13 -0800 From: "Matt Reimer" <mattjreimer@...il.com> To: linux-kernel@...r.kernel.org Subject: Re: [PATCH] mm: D-cache aliasing issue in cow_user_page In light of James Bottomsley's commit[1] declaring that kmap() and friends now have to take care of coherency issues, is the patch "mm: D-cache aliasing issue in cow_user_page"[2] correct, or could it potentially cause a slowdown by calling flush_dcache_page() a second time (i.e. once in an architecture-specific kmap() implementation, and once in cow_user_page())? Matt [1] http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a6ca1b99ed434f3fb41bbed647ed36c0420501e5 [2] http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=c4ec7b0de4bc18ccb4380de638550984d9a65c25 - 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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