On 2019-02-01 23:40 -0600, Bruce Dubbs via lfs-dev wrote:
> On 02/01/2019 09:53 PM, Ken Moffat via lfs-dev wrote:
> > On Fri, Feb 01, 2019 at 09:05:41PM -0600, Bruce Dubbs via lfs-dev wrote:
> > > On 02/01/2019 08:26 PM, Xi Ruoyao via lfs-dev wrote:
> > > > > FAIL: rt/tst-cputimer1
> > > > > FAIL: rt/tst-cputimer2
> > > > > FAIL: rt/tst-cputimer3
> > > > > Summary of test results:
> > > > > 5 FAIL
> > > > > 5959 PASS
> > > > > 18 UNSUPPORTED
> > > > > 17 XFAIL
> > > > > 2 XPASS
> > > >
> > > > The tests rt/test-cputimers{1..3} fails because of a kernel bug fixed
> > > > in:
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.0-rc4&id=93ad0fc088c5b4631f796c995bdd27a082ef33a6
> > > >
> > > > Not a "minor timing issue".
> > >
> > > Thanks for pointing that out. It is fixed in the 4.20.6 kernel, but not
> > > in
> > > the 4.20.1 kernel (which I was using).
> > >
> > > I can't figure out which kernels are affected. If someone can figure that
> > > out, I'll add it to the notes in the book on glibc test failures.
> > >
> > For 4.19, it was broken in 4.19.13 and fixed in 4.19.19.
> >
> > The fix for division by zero (which caused this problem) was in the
> > 4.20.0 release, and as you said, the fix is in 4.20.6.
>
> But the fix is not in the 4.20.1 release. I looked at the code and it
> isn't there.
Linux has multiple stable branches so a fix could be in 4.19.19 but not in
some of 4.20.x.
4.14.91 - 4.14.96, 4.19.13 - 4.19.18, 4.20.0 - 5, and 5.0.0-rc1 - rc3 are
broken. Other kernel releases should be good.
--
Xi Ruoyao <xry...@mengyan1223.wang>
School of Aerospace Science and Technology, Xidian University
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