Messages in this thread | | | Date | Wed, 17 Nov 2004 13:29:48 -0800 | From | Dave Olien <> | Subject | Re: DAC960 and latest kernels |
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I'll look into this. I'll see if I can reproduce any of these problems locally and get back to you.
Dave
On Wed, Nov 17, 2004 at 11:20:18AM -0800, ccantwel@uci.edu wrote: > It seems that I have found a very serious bug relating to the DAC960 > driver, it is present in 2.4.27 and 2.6.8.1 but I haven't tried any > development kernels newer than that. This message is meant to inform > the people who may be able to figure out what the problem is and > repair the bug. If anyone wants to respond to me or has further > information on this problem, please cc me directly, as I am not a > member of this mailing list. > > There is a bug in latest released kernels for both 2.4 and 2.6 > trees that seems to relate to the DAC960 driver. I have tried > 2.4.27 and 2.6.8.1 and both have the following problem. After > replacing and testing every piece of hardware I've determined > the problem is in the kernel and not the machine. Also, going > back to kernel 2.4.17 makes everything work perfectly. > > When copying a large number of files over the network using nc > and tar and also stress testing on the receiving side with > frequent du commands where the data is being written to (not > required for the problem but it seems to make it more likely > to happen) the machine randomly hangs. Sometimes it crashes > completely with an Unable to handle kernel paging request at > virtual address, with various processes, and sometimes it just > completely halts and responds to nothing even though it seems > to sort of be running (answers on sockets but transfers no data, > no more communication of any kind on other open sockets, entering > a login name and enter on the console also hangs before the > password prompt. > > Upon rebooting the filesystem that was being written to is corrupt. > When this file system is XFS I can still inspect it. If it is > reiser the machine will often hang trying to run fsck.reiserfs. > > In addition, after enough network tar copying I can stop the process, > and even if it has not hung the machine often the filesystem has > become corrupt. Since this happens with both xfs and reiser and > there are paging problems too I believe it has to relate to the > dac960 driver itself. > > I've also tried swapping DAC960 cards, and that doesn't matter, > they both work perfectly in 2.4.17 and the problems occur in > both cases in 2.4.27 and 2.6.8.1. I'm planning to try some > more kernels in between to narrow down when the problem was > introduced but I'm not a kernel developer and that is about the > most I will be able to do. > > I think the DAC960 driver isn't used very often and also without this > specific type of stress testing it is hard to realize the problem is > occuring before the filesystem is irreperably corrupt weeks down the > road, which is why this problem may have not been found yet. Without > stress testing using tar the machine can go for weeks and act like it > is fine. > > Again, if anyone has any information, please cc me when you reply as > I am not a member of this list. > > Thank you > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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