On Wed, Jun 27, 2007 at 05:26:50PM +0200, Andi Kleen wrote: > See the recent "quiet down swiotlb warnings" thread which uncovered > quite some corpses in Xen's current IO setup. > > Xen apparently bounces for multi page IOs which get merged from block > lists because the block layer doesn't know they are not really > continuous in machine memory. > > Proper fix is to tell the block layer to not merge in the first > place instead. > > And probably some similar mechanism for network drivers that limits > MTUs.
Will that guarantee that block and net IOs will not straddle a page boundary? Cheers, Muli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/