---------- Original Message ----------- From: Avi Kivity <avi@xxxxxxxxxx> To: Riccardo <andrighetto.riccardo@xxxxxxxxx> Cc: kvm@xxxxxxxxxxxxxxx Sent: Fri, 21 May 2010 18:21:20 +0300 Subject: Re: Gentoo guest with smp: emerge freeze while recompile world > On 05/21/2010 04:16 PM, Riccardo wrote: > > ... > > > >> There are almost impossible to debug. > >> > >> Try copying vmlinux out of your guest and attach with gdb when it > >> hangs. Then issue the command > >> > >> (gdb) thread apply all backtrace > >> > >> to see what the guest is doing. > >> > >> -- > >> Do not meddle in the internals of kernels, for they are subtle and quick to > >> > > panic. > > ------- End of Original Message ------- > > > > Hi, > > I compile gentoo-sources-2.6.31-r10 and with this kernel "emerge -e world" > > complete without errors! > > > > Interesing. Can you so a git bisect to see where it stops working? Ehm sorry I don't understand the request have you a link? > > I always use the same .config > > > > After I try gentoo-sources-2.6.34 and vanilla-sources-2.6.34 but the problem > > remain, the compile freeze and I see this in ps -elf: > > > > 5 S root 1013 1 0 76 -4 - 3125 poll_s 13:00 ? 00:00:00 > > /sbin/udevd --daemon > > 1 S root 2669 1 0 80 0 - 7523 wait 13:00 ? 00:00:00 > > supervising syslog-ng > > 5 S root 2670 2669 0 80 0 - 7556 poll_s 13:00 ? 00:00:00 > > /usr/sbin/syslog-ng > > 1 S root 3258 1 0 80 0 - 9505 poll_s 13:00 ? 00:00:00 > > /usr/sbin/sshd > > 1 S root 3378 1 0 80 0 - 4115 hrtime 13:00 ? 00:00:00 > > /usr/sbin/cron > > 0 S root 3446 1 0 80 0 - 1493 n_tty_ 13:00 tty2 00:00:00 > > /sbin/agetty 38400 tty2 linux > > 0 S root 3447 1 0 80 0 - 1493 n_tty_ 13:00 tty3 00:00:00 > > /sbin/agetty 38400 tty3 linux > > 0 S root 3448 1 0 80 0 - 1493 n_tty_ 13:00 tty4 00:00:00 > > /sbin/agetty 38400 tty4 linux > > 0 S root 3449 1 0 80 0 - 1493 n_tty_ 13:00 tty5 00:00:00 > > /sbin/agetty 38400 tty5 linux > > 0 S root 3450 1 0 80 0 - 1493 n_tty_ 13:00 tty6 00:00:00 > > /sbin/agetty 38400 tty6 linux > > 5 S root 3457 1 0 80 0 - 5959 poll_s 13:00 ? 00:00:00 > > SCREEN -S sb1 > > 4 S root 3458 3457 0 80 0 - 4454 wait 13:00 pts/0 00:00:00 > > -/bin/bash > > 4 S root 3462 3458 0 75 -5 - 45171 poll_s 13:00 pts/0 00:00:34 > > /usr/bin/python2.6 /usr/bin/emerge -e world > > 4 S root 3613 1 0 80 0 - 14014 wait 13:01 tty1 00:00:00 > > /bin/login -- > > 4 S root 3953 3613 0 80 0 - 4429 n_tty_ 13:01 tty1 00:00:00 -bash > > 0 S root 6614 3462 0 75 -5 - 972 wait 14:26 pts/0 00:00:00 > > [dev-util/pkgconfig-0.23] sandbox "/usr/lib64/portage/bin/ebuild.sh" compile > > 4 S root 6615 6614 0 75 -5 - 6362 wait 14:26 pts/0 00:00:00 > > /bin/bash /usr/lib64/portage/bin/ebuild.sh compile > > 5 S root 6646 6615 0 75 -5 - 6745 wait 14:26 pts/0 00:00:00 > > /bin/bash /usr/lib64/portage/bin/ebuild.sh compile > > 4 S root 13235 6646 0 75 -5 - 3651 wait 14:27 pts/0 00:00:00 > > make -j8 > > 4 S root 13238 13235 0 75 -5 - 3652 wait 14:27 pts/0 00:00:00 > > make all-recursive > > 4 S root 13239 13238 0 75 -5 - 5956 wait 14:27 pts/0 00:00:00 > > /bin/sh -c set fnord $MAKEFLAGS; amf=$2; \?dot_seen=no; \?target=`echo > > all-recursive | sed s/-recursive//`; \?list= > > 5 S root 13243 13239 0 75 -5 - 5956 wait 14:27 pts/0 00:00:00 > > /bin/sh -c set fnord $MAKEFLAGS; amf=$2; \?dot_seen=no; \?target=`echo > > all-recursive | sed s/-recursive//`; \?list= > > 4 S root 13244 13243 0 75 -5 - 3686 wait 14:27 pts/0 00:00:00 > > make all > > 4 S root 13358 13244 0 75 -5 - 3684 wait 14:27 pts/0 00:00:00 > > make all-recursive > > 4 S root 13359 13358 0 75 -5 - 5956 wait 14:27 pts/0 00:00:00 > > /bin/sh -c set fnord $MAKEFLAGS; amf=$2; \?dot_seen=no; \?target=`echo > > all-recursive | sed s/-recursive//`; \?list= > > 5 S root 16546 13359 0 75 -5 - 5956 wait 14:28 pts/0 00:00:00 > > /bin/sh -c set fnord $MAKEFLAGS; amf=$2; \?dot_seen=no; \?target=`echo > > all-recursive | sed s/-recursive//`; \?list= > > 4 S root 16547 16546 0 75 -5 - 3652 wait 14:28 pts/0 00:00:00 > > make all > > 4 S root 16548 16547 0 75 -5 - 3652 n_tty_ 14:28 pts/0 00:00:00 > > make all-am > > 4 S root 16599 3258 0 80 0 - 17937 poll_s 15:07 ? 00:00:00 > > sshd: root@pts/2 > > 4 S root 16602 16599 0 80 0 - 4429 wait 15:07 pts/2 00:00:00 -bash > > 4 R root 16611 16602 0 80 0 - 3698 - 15:08 pts/2 00:00:00 ps -elf > > 1 S root 31506 2 0 80 0 - 0 bdi_wr 14:25 ? 00:00:00 > > [flush-253:0] > > > > All in wait? > > > > Maybe a block driver problem? Are you using virtio? Yes, I always used virtio. In the server the kernel is sys-kernel/gentoo-sources-2.6.33 and in dmesg I see this new lines about clock?: [ 885.500098] CE: hpet increasing min_delta_ns to 15000 nsec [ 1354.020020] CE: hpet increasing min_delta_ns to 22500 nsec [ 2657.777387] hrtimer: interrupt took 7542 ns [ 7148.533547] CE: hpet increasing min_delta_ns to 33750 nsec > > After this test I reboot in 2.6.31-r10 and I complete emerge -e world succefully. > > The problem show always with all kernels>=2.6.32 > > I have setup something wrong in kernel? I post the .config in the previous email. > > > > > > It should work for all .configs. Thanks for your checks. > ------- End of Original Message ------- Now I have leave the VM freeze. If you can debug I can send you the data for connect to the VM. Riccardo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
