Messages in this thread | | | Date | Tue, 26 Jul 2016 17:18:59 -0400 | From | Dave Jones <> | Subject | Re: [LKP] More information please. Re: [fs] 54cc07a761: BUG: kernel test crashed |
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On Tue, Jul 26, 2016 at 02:50:58PM -0500, Eric W. Biederman wrote:
> > Yes that's the right directions to follow. We'll make the reports more > > understandable and the test/bisects more reliable. > > Thanks. Does trinity have a random seed it can export/import to rerun > the same tests? I ask because there was a failure these tests caught > that if the right kernel options was enabled was 100% reliable and it > blamed a commit 10 patches down from the indicated commit.
It does log the random seed on startup, and can replay it with the -s option
There is some variance if you were to do two runs with the same seed back to back, because on startup, it walks /proc & /sys, and they'd see different things so for eg "read() from fd 100" might mean something entirely different.
But as the testbot runs a pretty minimal userspace, only runs trinity once, and really early in boot, this point might not matter.
Dave
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