Date: Mon, 23 Jul 2007 08:44:08 -0500 From: Kevin Kramer <kramer@centtech.com> To: freebsd-current@freebsd.org Subject: Re: processes stuck in kqread Message-ID: <46A4B0A8.90805@centtech.com> In-Reply-To: <20070723011058.GB99491@funkthat.com> References: <469E3B7C.4020402@centtech.com> <20070722001514.GB1221@funkthat.com> <46A3CBCE.3000300@freebsd.org> <20070723011058.GB99491@funkthat.com>
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that was it. I had a nisdomain set in my rc.conf, but no client configuration lines. I've commented it all out and all is well. thanks. _________________________________________________ Kevin Kramer Sr. Systems Administrator Centaur Technology, Inc. Office: 512-418-5725 Cell : 512-470-7671 http://www.centtech.com _________________________________________________ John-Mark Gurney wrote the following on 07/22/07 20:10: > Eric Anderson wrote this message on Sun, Jul 22, 2007 at 16:27 -0500: > >> John-Mark Gurney wrote: >> >>> 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... >>> >>> >> You mean like the one he put here: >> >> http://users.centtech.com/~kramer/snapshot/top-trace.txt >> > > /me needs to read closer. > > Thought it might be a yp issue: > 84667 top 0.005085 CALL open(0x7fffffffdd00,O_RDONLY,<unused>0x1e) > 84667 top 0.005091 NAMI "/var/yp/binding/centtech.com.2" > 84667 top 0.005105 RET open -1 errno 2 No such file or directory > [...] > 84667 top 0.005461 CALL socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP) > 84667 top 0.005468 RET socket 5 > [...] > 84667 top 0.005533 CALL bind(0x5,0x7fffffffda10,0x10) > 84667 top 0.005542 RET bind 0 > [...] > 84667 top 0.006028 CALL sendto(0x5,0x800c11ac4,0x38,0,0x800c11808,0x10) > > >> 84667 top 0.006110 RET sendto 56/0x38 >> 84667 top 0.006128 CALL >> kevent(0x6,0x800c11910,0x1,0x7fffffffdad0,0x1,0x7fffffffdb10) >> 84667 top 5.008057 GIO fd 6 wrote 32 bytes >> 0x0000 0500 0000 0000 0000 ffff 0100 0000 0000 0000 0000 0000 >> 0000 0000 0000 0000 0000 >> |................................| >> >> 84667 top 5.008073 GIO fd 6 read 0 bytes >> "" >> 84667 top 5.008078 RET kevent 0 >> 84667 top 5.008086 CALL gettimeofday(0x7fffffffdb20,0) >> 84667 top 5.008091 RET gettimeofday 0 >> 84667 top 5.008096 CALL >> sendto(0x5,0x800c11ac4,0x38,0,0x800c11808,0x10) >> 84667 top 5.008139 GIO fd 5 wrote 56 bytes >> 0x0000 4696 2a64 0000 0000 0000 0002 0001 86a0 0000 0002 0000 >> 0003 0000 0000 0000 0000 0000 0000 0000 0000 >> |F.*d....................................| >> 0x0028 0001 86a7 0000 0002 0000 0006 0000 0000 >> |................| >> >> 84667 top 5.008155 RET sendto 56/0x38 >> 84667 top 5.008163 CALL >> kevent(0x6,0x800c11910,0,0x7fffffffdad0,0x1,0x7fffffffdb10) >> 84667 top 15.007883 GIO fd 6 wrote 0 bytes >> "" >> > > Looks like it's trying to contact the yp server and isn't getting a > response... Check your user/host name lookup... > >
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