http://bugzilla.kernel.org/show_bug.cgi?id=14972 --- Comment #4 from Theodore Tso <tytso@xxxxxxx> 2010-01-02 16:47:35 --- OK, so that's not technically a regression as far as what the kernel bugzilla field is concerned. >... my HDD led keeps flashing continuously which certainly means some disk >activity. Should I attach a video showing this abnormality on kernel 2.6.32.2 >on runlevel 1 with no application running except bash and this application? What would be much more useful would be to install blktrace, and then attach the output of "btrace /dev/sdXX" while this application is running. When I do the test, I am seeing some excess write barriers which we can optimize away: 254,3 0 1148 31.613064584 10904 Q WB [test] 254,3 0 1149 31.664270330 10904 Q WB [test] 254,3 0 1150 31.715259078 10904 Q WB [test] 254,3 0 1151 31.772662156 10904 Q WB [test] 254,3 0 1152 31.827932269 10904 Q WB [test] 254,3 0 1153 31.883122551 10904 Q WB [test] but that's not a disaster. (If there is no pending writes from other applications, this won't cause any extra hard drive activity.) I'd like to confirm whether you are seeing anything more, since at least for me on my system, empty write barriers don't cause the hard drive activity light to go on. Maybe it does for your system, though. I'd like to confirm this since because if it's just a matter of extra (unnecessary) write barriers, we would prioritize this as a much lower priority bug to tackle than if there's something else going on. -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
