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SubjectRe: HZ != 1000 causes problem with serial device shown by git-bisect
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On Mon, 27 Mar 2006 20:27:19 EST, Lee Revell said:
> On Mon, 2006-03-27 at 18:46 -0500, Greg Lee wrote:
> > I have also tried a number of other kernels and the problem exists all
> > the way to 2.6.15.6
> > but is fixed in 2.6.16, so I am going to git-bisect 2.6.15.6 to
> > 2.6.16, but I thought I
> > would get this message out now in case someone has an inkling of what
> > the problem is.
>
> If it's fixed in 2.6.16, what's the problem? It's not as if we can go
> back and fix those old kernels...

I may be misreading Greg's concern, but I got the feeling that he's worried
that 2.6.16 isn't *really* fixed, but that something is just papering over the
driver's innate displeasure with HZ==250 (and thus it's likely that in .17 or
.18 or whenever, some *other* patch will make it re-manifest).

And we've seen *enough* bugs that only manifest in even or odd or
divisible-by-7.48 kernels that we know that "it works in 2.6.16" is vastly
different than being able to point at a changeset (or even a stream of fixes)
and say "fixed by that" or "probably went away when this stream of patches
totally reworked the code".

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