Date: Sat, 21 Jul 2007 17:15:14 -0700 From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> To: kevin kramer <kramer@centtech.com> Cc: freebsd-current@freebsd.org Subject: Re: processes stuck in kqread Message-ID: <20070722001514.GB1221@funkthat.com> In-Reply-To: <469E3B7C.4020402@centtech.com> References: <469E3B7C.4020402@centtech.com>
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kevin kramer wrote this message on Wed, Jul 18, 2007 at 11:10 -0500: > I have been having issues for some time on -CURRENT. My latest update > was 7/11. I have identified these processes as being stuck in kqread > while waiting for them to continue. > > Processes that I know are a problem: > sshd - I can watch a login and the process goes from Select to kqread, > takes about 3-4 minutes to get a login prompt > top - takes about 2-3 minutes to come up > tar - never really even starts to read data in and stays in kqread > > Processes not affected: > scp > gstat > cvsup > make > > This machine is running AMD64 GENERIC kernel on a Dual-Core Xeons. > dmesg.txt and top-trace.txt here, http://users.centtech.com/~kramer/snapshot > > What do I do to debug this? running the process under ktrace would help identify what it is waiting for... Though if it usually hangs for a minute or two in kqread, and then continues, it's probably a DNS lookup issue... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."
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