From: Bernd Zeimetz <bernd@xxxxxxx> Date: Fri, 26 Oct 2007 14:30:21 +0200 > at least it runs with 100% CPU, attaching strace to the pid doesn't give > any results.... > strace-ing the whole process doesn't result in more useful output, but > the hanging processes were killable when they were running under strace... When it runs with 100% CPU that's what makes me suspect it's spinning in the kernel futex code somewhere or similar. One thing I notice in the debian bug report is a mention of libnss-db So I did some testing here and without libnss-db installed, running dpkg-query does not use futexes at all. But once I install libnss-db and enable it (by running 'make' under /var/lib/misc then editing /etc/nsswitch.conf to make 'db' get searched first) indeed dpkg-query starts using futexes via the libnss-db library. Josip, do you guys have libnss-db or similar in use on the buildd machine? For those who can reproduce it an have something like libnss-db enabled, try disabling it. - To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
