Steve Langasek [2015-10-22 18:11 -0000]: > > * If we really want to dump, we could investigate into sendfile. I'm not > > * entirely sure that it works with data coming in via stdin, but it's > > * worth a try as we would avoid the kernel -> userspace copy. > > This is an interesting suggestion. It would imply requiring a second > post-processing stage, to combine this file with the rest of the crash > report in proper (compressed, base64-encoded) format;
How would that help? In any case you first need to put the core dump from stdin onto the disk, and that's precisely the bit that we are doing now (and not much more) and which takes so long. We also compress it along the way of course, mostly because we don't have much choice. Uncompressed core dumps are huuuge, and writing them to things like slow and small MMC cards/phone memory wouldn't help in the slightest. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apport in Ubuntu. https://bugs.launchpad.net/bugs/1278780 Title: apport takes too long to write crash report, appears to lock up phone Status in Apport: Confirmed Status in Canonical System Image: Confirmed Status in qtubuntu: Invalid Status in apport package in Ubuntu: Triaged Status in qtmir package in Ubuntu: Confirmed Bug description: I can trigger a crash easily on my phone via bug 1262711. Other bugs are available. When that happens my phone appears to freeze. I am unable to do anything for approximately 1 to 1.5 minutes. As a user my initial gut reaction is to reboot the phone, thus losing the crash report, and wasting my time. Having the phone lock up for 1.5 minutes is a terrible user experience. Can we fix/mitigate/workaround that? ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: apport 2.13.2-0ubuntu2 Uname: Linux 3.4.0-3-mako armv7l ApportVersion: 2.13.2-0ubuntu2 Architecture: armhf CrashReports: 664:32011:110:10083:2014-02-10 15:41:18.152893384 +0000:2014-02-10 15:11:09.169231740 +0000:/var/crash/_usr_lib_arm-linux-gnueabihf_upstart-app-launch_desktop-hook.32011.crash 640:0:110:1681527:2014-02-10 15:12:10.985193887 +0000:2014-02-10 15:12:05.639489630 +0000:/var/crash/_usr_bin_powerd.0.crash 640:0:110:21384:2014-02-11 07:58:44.876281991 +0000:2014-02-11 07:58:44.876281991 +0000:/var/crash/_usr_sbin_system-image-dbus.0.crash 640:32011:110:17122318:2014-02-11 09:19:49.915478726 +0000:2014-02-11 09:18:20.850439824 +0000:/var/crash/_usr_bin_unity8.32011.crash Date: Tue Feb 11 09:20:15 2014 InstallationDate: Installed on 2014-02-11 (0 days ago) InstallationMedia: Ubuntu Trusty Tahr (development branch) - armhf (20140211) PackageArchitecture: all ProcEnviron: TERM=linux PATH=(custom, no user) XDG_RUNTIME_DIR=<set> SHELL=/bin/bash SourcePackage: apport UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/apport/+bug/1278780/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
