Re: [RFC 0/4] Migrate timers away from cpuset on setting cpuset.quiesce

From: Viresh Kumar
Date: Thu Apr 24 2014 - 05:30:48 EST


On 24 April 2014 14:54, Daniel Sangorrin <daniel.sangorrin@xxxxxxxxxxxxx> wrote:
> Why didn't you just apply the patch on top of your tree so that the
> information included in the git commit (e.g: my name and mail) remains?
>
> This part:
>
> cpuset: quiesce: change irq disable/enable by irq save/restore
>
> The function __migrate_timers can be called under interrupt context
> or thread context depending on the core where the system call was
> executed. In case it executes under interrupt context, it
> seems a bad idea to leave interrupts enabled after migrating the
> timers. In fact, this caused kernel errors on the ARM architecture and
> on the x86_64 architecture with the 3.10 kernel (backported version
> of the cpuset-quiesce patch).
>
> Signed-off-by: Daniel Sangorrin <daniel.sangorrin@xxxxxxxxxxxxx>
> Signed-off-by: Yoshitake Kobayashi <yoshitake.kobayashi@xxxxxxxxxxxxx>

That's what I told you earlier when I said this:

> I can't keep it as a separate patch and so would be required to merge
> it into my original patch..

And the reason being: "No patch is supposed to break things, otherwise
git bisect wouldn't work smoothly".. And so git bisect would complain
this issue after my patch and so I have to merge the fixes you gave into
the original patch as its not yet merged.
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