On 4 July 2012 06:47, Axel Beckert <[email protected]> wrote: > Hi, > > since about a day or such my Sid DomU (Xen virtual machine) gets > extremely sluggish as soon as I start "aptitude -u". It even throws > kernel messages like this several times during the (very slow) package > update: > > Message from syslogd@kiva6 at Jul 4 00:02:00 ... > kernel:[7736331.176014] BUG: soft lockup - CPU#0 stuck for 23s! > [ksoftirqd/0:3] >
This is during the list update? > If I first run apt-get update and then aptitude without -u, everything > seems fine for a moment, but then all mentioned processes go on 100% > cpu again as soon as the view is generated (maybe a little bit > earlier, too, but not as soon as the blue bars are shown on top and > bottom), funnily except aptitude itself. It stays at 5% to 10%. And this is before you actually see the list of packages? Have not encountered these issues myself. Similar experiences on the BTS often appear due to the problem resolver and/or threading issues, especially with multiple CPU. Recent reports involving the resolver: #631071, #668544. Is Aptitude::Auto-Upgrade enabled? Multi-arch? Based on your command-line log showing conflicts with safe-upgrade, I would suspect the resolver at fault here. Trace logs or a backtrace from the point(s) where the program is being sluggish might help, though can be painful to inspect when threading issues are involved. Trace logs: # aptitude -u --log-file=resolver.log --log-resolver Please kill the program while it is being sluggish so the log tail is hot. And same again without -u. > "which-pkg-broke aptitude" shows the following potential packages > which could have broken aptitude recently: > These updates don't look suspicious: > libdb5.1:amd64 [apt-utils] > debconf [only used during install run] > dpkg [install run] > libxapian22 [only used for search] > libapt-pkg4.12:amd64 [changelog looks benign, although recent change to mmap > behaviour…] Most recent upload has several changes to pthreads which /seem/ unrelated, however, you could try downgrading to the versions previously installed: > libc-bin > libc6:amd64 > multiarch-support Regards _______________________________________________ Aptitude-devel mailing list [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/aptitude-devel
