[Bug 955379] Re: cmake hangs with qemu-arm-static
LK: Ok, good catch, that might be more suitable option. Thanks, -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
Luke Kim: quite unlikely that above patch would cause the issue you see.. are you sure something else did not break in your environment? Can you execute that same make manually? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
Some kind of semi-workaround patch attached. It seems to leave this kind of race window for me (for select which is worse): 0x6004bf98 <+136>: xor%r8d,%r8d 0x6004bf9b <+139>: test %eax,%eax 0x6004bf9d <+141>: jne0x6004c2b7 0x6004bfa3 <+147>: mov0x20(%rsp),%r14 0x6004bfa8 <+152>: mov0x246d8(%r14),%esi 0x6004bfaf <+159>: test %esi,%esi 0x6004bfb1 <+161>: je 0x6004bfb8 0x6004bfb3 <+163>: lea0x40(%rsp),%r8 0x6004bfb8 <+168>: mov0x28(%rsp),%rdx 0x6004bfbd <+173>: mov%r11,%rsi 0x6004bfc0 <+176>: mov%ebx,%edi 0x6004bfc2 <+178>: callq 0x6012df90 I think it could still be narrowed some, but this makes it unlikely enough for me for time being... ** Patch added: "racy workaround patch" https://bugs.launchpad.net/qemu/+bug/955379/+attachment/3452139/+files/cmake.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
Just out of interest tried how far the timeout hackery can go working around the issue. Well, looks like it goes quite far: having previously reproduced the hang in 4-5 runs and in under a minute, now have had this running without a hang for an hour. I will also test the patch under OBS worker(s) and if it solves the issue there as well, I will attach it as a workaround for time being for those interested. However, Peter is right and this is not a final solution of any kind: just a workaround. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
Never mind, async/zero timeout call would suffer from same (albeit now tiny) race. It would make this far less invasive as a change though. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
Moreover, is there even a need to restart anything, just make it async call in case signals were pending? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
And what would break if we make poll timeout instantly in case there are signals pending and restart the given syscall after handlers run? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
So I guess 'raciness' of my proposed patch would only depend on how small I could squeeze the section between 'sigpending' flag comparison and actual syscall entering? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
> this blocks forever, because the thing that would wake it up is the signal handler writing to the pipe we're selecting on, but we will never run the signal handler until select exits Duh, makes sense, have to think about this. Thank you for great analysis :) Apparently have to dig into qemu's code to understand this better, but first thought was that do you think it would be possible to add some crude hack bit in qemu's signal handler which we could 'almost atomically' check prior to entering system poll/select/read/whatnot ? This bit would tell there are user signals queued and handlers should be executed first.. ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
If that is the case for you (for me it reproduces it every 4-5 runs or so), there are two options: 1) put while(true) loop around the rpmbuild and you will hit it always, or 2) I can wrap up a bit bigger cmake usecase that systematically hits it. Warn you though, size will jump to 200M. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
Mind you, when you hit the bug it just hangs and cmake test errors are just to speed up the process of hitting the bug (if cmake just fails you did not hit the bug). Feel free to try with any qemu variant, they all hang similarly when bug is hit. I think that root had some suse 1.2 one inside. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
Ok, test case attached (80M tar). This hugely stripped one is not 100% reproducer, but do few loops and you will hit it. Instructions for using: - extract, chroot - cd /home/abuild/rpmbuild - su abuild - export RPM_BUILD_ROOT=$PWD - rpmbuild -ba SOURCES/libshortcut.spec ** Attachment added: "Tizen chroot" https://bugs.launchpad.net/qemu/+bug/955379/+attachment/3446633/+files/root5-small.tar.bz2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 955379] Re: cmake hangs with qemu-arm-static
Peter, I have qemu chrootable test case under which you could fire one command to hit the bug reliably. Only issue is, are you willing to take a peek at 100M extractable tarball? If not, I'll try to create a smaller one. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955379 Title: cmake hangs with qemu-arm-static To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 489101] Re: karmic: udevadm trigger run races udevd startup
On Tue, Dec 1, 2009 at 12:29 AM, Scott James Remnant wrote: > Upstart waits for udevd to fork() before emitting "started udevd", this > is sufficient to avoid races. udevd has opened all sockets and is > listening on them by the time it forks, while it may not be in the main > loop, any connections will be queued and any events will be pooling on > the socket, so things work out just fine. Looks about right then, thanks for the clarification. -- // Janne -- karmic: udevadm trigger run races udevd startup https://bugs.launchpad.net/bugs/489101 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 489101] [NEW] karmic: udevadm trigger run races udevd startup
Public bug reported: Binary package hint: udev My system randomly ends up in condition after bootup where I have 3 instances of udevd running of which upstart is only aware of one. None of them seem properly working as ethernet device renaming has not been finalized. My guess for the reason might be that: - udev.conf starts up udevd - udevtrigger.conf starts up udevadm trigger based on condition 'start on started udev' Isn't this a obvious race? I don't think udevd is guaranteed even to hit main() by the time udevadm trigger can be run (IMHO once its forked upstart considers it running). My guess is that those 2 extra udevd instances come from kernel trying to start up new instance of udevd as one is not registered yet. For now I'll just fix this with udevtrigger pre-start script that sleeps for few seconds.. ** Affects: udev (Ubuntu) Importance: Undecided Status: New -- karmic: udevadm trigger run races udevd startup https://bugs.launchpad.net/bugs/489101 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 285212] Re: npviewer.bin crashed with SIGSEGV in PL_HashTableLookupConst()
Just started happening to me as well after updating to Intrepid. Thedailyshow worked well with Hardy + unofficial flash 10. Hardy with 'official' Flash 9 had the same problem. -- npviewer.bin crashed with SIGSEGV in PL_HashTableLookupConst() https://bugs.launchpad.net/bugs/285212 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 259670] Re: reproducable nspluginwrapper crash
** Attachment added: "Dependencies.txt" http://launchpadlibrarian.net/16952387/Dependencies.txt ** Attachment added: "ExtensionSummary.txt" http://launchpadlibrarian.net/16952388/ExtensionSummary.txt ** Attachment added: "pluginreg.dat.txt" http://launchpadlibrarian.net/16952389/pluginreg.dat.txt ** Attachment added: "profiles.ini.txt" http://launchpadlibrarian.net/16952390/profiles.ini.txt -- reproducable nspluginwrapper crash https://bugs.launchpad.net/bugs/259670 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 259670] [NEW] reproducable nspluginwrapper crash
Public bug reported: Binary package hint: nspluginwrapper Flash video stream used by thedailyshow seems to reliably crash nspluginwrapper. kernel: [96509.058961] npviewer.bin[30695]: segfault at 726f7463 rip 726f7463 rsp ffab863c error 14 http://www.thedailyshow.com/ nspluginwrapper0.9.91.5-2ubuntu2 flashplugin-nonfree 10.0.1.218+10.0.0.525ubuntu1~hardy1+really9.0.124.0ubuntu2 Using up-to-date 64bit hardy. Either this is a regression OR the thedailyshow site changed something. ProblemType: Bug Architecture: amd64 Date: Wed Aug 20 11:56:11 2008 DistroRelease: Ubuntu 8.04 NonfreeKernelModules: nvidia Package: firefox-3.0 3.0.1+build1+nobinonly-0ubuntu0.8.04.3 PackageArchitecture: amd64 ProcEnviron: PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: firefox-3.0 Uname: Linux 2.6.24-19-generic x86_64 ** Affects: nspluginwrapper (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug -- reproducable nspluginwrapper crash https://bugs.launchpad.net/bugs/259670 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 212855] Re: npviewer.bin crashed with SIGSEGV in g_type_check_instance_cast()
Not that I would know if this is a crash or not, but at least I'm still seeing tons on unreaped npviewer.bins with the latest nspluginwrapper. Who's the parent here that's supposed to reap these? Firefox itself? jmk 5129 5097 13 Jul28 ?11:31:35 [npviewer.bin] -- npviewer.bin crashed with SIGSEGV in g_type_check_instance_cast() https://bugs.launchpad.net/bugs/212855 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
