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Re: [PATCH] rt: x86: extend signal send delay to 32 bit

From Thomas Gleixner <tglx@linutronix.de>
Newsgroups linux.kernel
Subject Re: [PATCH] rt: x86: extend signal send delay to 32 bit
Date 2015-12-12 15:40 +0100
Message-ID <qETv4-3kN-9@gated-at.bofh.it> (permalink)
References <qEeUW-1TL-11@gated-at.bofh.it> <qEAiK-7Yl-25@gated-at.bofh.it> <qEBRw-mG-39@gated-at.bofh.it>
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On Fri, 11 Dec 2015, Shi, Yang wrote:
> On 12/11/2015 10:05 AM, Sebastian Andrzej Siewior wrote:
> > * Yang Shi | 2015-12-10 10:58:51 [-0800]:
> > > Signal send delay is just available for x86-64, x86-32 needs it too.
> > 
> > This is new, this was not the case earlier. New means since v4.0-rc1 which
> 
> Yes, it is. We didn't find this problem in earlier version kernel (I'd say
> 3.x).
> 
> > is when 959274753857 ("x86, traps: Track entry into and exit from IST
> > context") got merged.
> > Since now ist_enter() disables preemption in any case, our hacks to
> > conditional_sti_ist() are pointless and could be removed.
> 
> I'm supposed you will revert it and not need a revert patch from me.

Why do you think that reverting it is a good idea? Just because we can
or what?

No, we fix it up on the RT side.

Thanks,

	tglx
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Thread

[PATCH] rt: x86: extend signal send delay to 32 bit Yang Shi <yang.shi@linaro.org> - 2015-12-10 20:20 +0100
  Re: [PATCH] rt: x86: extend signal send delay to 32 bit Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2015-12-11 19:10 +0100
    Re: [PATCH] rt: x86: extend signal send delay to 32 bit "Shi, Yang" <yang.shi@linaro.org> - 2015-12-11 20:50 +0100
      Re: [PATCH] rt: x86: extend signal send delay to 32 bit Thomas Gleixner <tglx@linutronix.de> - 2015-12-12 15:40 +0100

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