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Message-ID: <20070428130702.GA23589@bitwizard.nl> Date: Sat, 28 Apr 2007 15:07:02 +0200 From: Rogier Wolff <R.E.Wolff@...Wizard.nl> To: linux-kernel@...r.kernel.org Subject: nbd hangs in 2.6.21 Hi, I've been doing some work with nbd-servers, but it seems they are a bit unreliable right now. It seems to be the kernel side that is locking up. Doing things like dd if=/dev/zero of=filesys bs=1k count=1 seek=1024000 nbd-server 1234 `pwd`/filesys and then nbd-client othersystem 1234 /dev/nd0 mke2fs /dev/nd0 mount /dev/nd0 /mnt cp -r /usr/src/linux/ /mnt/test1 cp -r /usr/src/linux/ /mnt/test2 sync will usually do the trick: The sync will hang in disk-wait and never come out of it. In my case "othersystem" is running 2.6.20. I don't think it is causing the problems: the nbd-server is simply waiting for the next request. I also tried a different codebase: nbdsvr. Same thing. Anybody else see this? Roger. -- ** R.E.Wolff@...Wizard.nl ** http://www.BitWizard.nl/ ** +31-15-2600998 ** *-- BitWizard writes Linux device drivers for any device you may have! --* Q: It doesn't work. A: Look buddy, doesn't work is an ambiguous statement. Does it sit on the couch all day? Is it unemployed? Please be specific! Define 'it' and what it isn't doing. --------- Adapted from lxrbot FAQ - 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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