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Message-ID: <467ED4A8.4080500@esuna.co.uk> Date: Sun, 24 Jun 2007 21:31:36 +0100 From: "Jay L. T. Cornwall" <jay@...na.co.uk> To: Jay Cliburn <jacliburn@...lsouth.net> CC: linux-kernel@...r.kernel.org Subject: Re: 2.6.22-rc5: pdflush oops under heavy disk load Jay Cliburn wrote: >> The common factor here seems to be the buffer_head circular list >> leading to invalid pointers in bh->b_this_page. >> >> I'm beginning to suspect the Attansic L1 Gigabit Etherner driver >> (marked as EXPERIMENTAL in 2.6.22-rc5). I can't reproduce these >> panics on disk-to-disk copies or SCP across the localhost interface. >> However, SCP from a server onto either of two different HDDs hits >> these oopses fairly quickly. > How much RAM is installed in your machine? If it's 4GB or more, does > your problem go away if you boot with mem=3000M? Intriguing. Yes, this machine has 4GB of RAM. If I boot with mem=3000M the problem does indeed go away - I can't induce an oops even after transferring tens of GB across the interface. I'm not sure I follow why that would be the case, except that it relates to pci_map_page behaviour. But I guess you have an inkling? -- Jay L. T. Cornwall, http://www.esuna.co.uk/~jay/ PhD Student Imperial College London - 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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