Re: [Bugme-new] [Bug 8479] New: gettimeofday returning 1000000 intv_usec on core2duo

[Eric Dumazet]

Andrew Morton a écrit :
> On Mon, 14 May 2007 21:17:47 -0700 bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote:
>
> > http://bugzilla.kernel.org/show_bug.cgi?id=8479
> >
> >            Summary: gettimeofday returning 1000000 in tv_usec on core2duo
> >     Kernel Version: 2.6.21
> >             Status: NEW
> >           Severity: normal
> >              Owner: ak@xxxxxxx
> >          Submitter: dang@xxxxxxxxxx
> >
> >
> > Most recent kernel where this bug did *NOT* occur: 2.6.20
> > Distribution: Gentoo
> > Hardware Environment: core2duo T7200 (all reporters had this same CPU)
> > Software Environment: Linux 2.6.21, glibc 2.5
> > Problem Description:
> >
> > gettimeofday returns 1 - 1000000 in tv_usec, not 0 - 999999 
> > This does not happen on any of my AMD-based 32 or 64 bit boxes, only on my
> > core2duo; I have 2 other reports of this problem, all on T7200's
> >
> > Steps to reproduce:
> >
> > call gettimeofday a lot.  Eventually, you'll get 1000000 returned in tv_usec. My
> > average is ~1 in 1000000 calls.  I've attached my test program, with output from
> > various boxes.  One of the other reporters tried the test program too, and got
> > similar output.  .config will be attached too.
>
> err, whoops.

I remember I already hit this and corrected it

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blobdiff;f=arch/x86_64/kernel/vsyscall.c;h=dc32cef961950915fbaa185e36ab802d5f7cea3b;hp=ba330f87067996a17495f7d03466d646c718b52c;hb=c8118c6c07f2edfd697aaa0b93e08c3b65a5a675;hpb=272a3713bb9e302e0455c894c41180a482d2c8a3

Maybe a stable push is necessary ?


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