Date: Fri, 20 Oct 2006 08:42:15 +0900 From: Kazuaki ODA <kaakun@highway.ne.jp> To: Kris Kennaway <kris@obsecurity.org> Cc: freebsd-stable@freebsd.org Subject: Re: ps locks up on 6.2-PRERELEASE SMP Message-ID: <45380D57.9040302@highway.ne.jp> In-Reply-To: <20061019225256.GA38237@xor.obsecurity.org> References: <4538009D.6030400@highway.ne.jp> <20061019225256.GA38237@xor.obsecurity.org>
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Kris Kennaway wrote: > On Fri, Oct 20, 2006 at 07:47:57AM +0900, Kazuaki ODA wrote: >> Hi, >> >> I ran the following two scripts simultaneously on 6.2-PRERELEASE SMP box >> (cvsup'ed today). >> >> ---------------------------------------- >> #!/bin/sh >> >> while true; do >> ls -lR / > ls_result.txt >> done >> ---------------------------------------- >> >> ---------------------------------------- >> #!/bin/sh >> >> while true; do >> ls -lR / > ls_result2.txt >> done >> ---------------------------------------- >> >> After a while (about 5 minutes), I suspended and killed the both, and >> ran "ps". As the result, "ps" locked up. No response and no output. >> To make matters worse, I could not login anymore... >> >> This is 100% reproducable on SMP, but no problem when using Non-SMP kernel. > > What state is ps in? Press ^T. It's probably a devfs lockup, which > should be fixed by changes yet to be merged. > > Kris I tried again. But ^T, ^C and ^Z had no effect, ps was still locking.. Should I rebuild kernel with DDB option, and go into DDB to get more information? -- Kazuaki ODA
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