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Message-ID: <87y1h2ur98.ffs@tglx>
Date: Tue, 19 Sep 2023 17:17:23 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: Anton Ivanov <anton.ivanov@...bridgegreys.com>,
Peter Zijlstra <peterz@...radead.org>,
John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Cc: Matthew Wilcox <willy@...radead.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Ankur Arora <ankur.a.arora@...cle.com>,
linux-kernel@...r.kernel.org, linux-mm@...ck.org, x86@...nel.org,
akpm@...ux-foundation.org, luto@...nel.org, bp@...en8.de,
dave.hansen@...ux.intel.com, hpa@...or.com, mingo@...hat.com,
juri.lelli@...hat.com, vincent.guittot@...aro.org, mgorman@...e.de,
rostedt@...dmis.org, jon.grimm@....com, bharata@....com,
raghavendra.kt@....com, boris.ostrovsky@...cle.com,
konrad.wilk@...cle.com, jgross@...e.com, andrew.cooper3@...rix.com,
Geert Uytterhoeven <geert@...ux-m68k.org>,
linux-m68k@...ts.linux-m68k.org,
Richard Weinberger <richard@....at>,
Johannes Berg <johannes@...solutions.net>,
linux-um@...ts.infradead.org, Brian Cain <bcain@...cinc.com>,
linux-hexagon@...r.kernel.org,
Richard Henderson <richard.henderson@...aro.org>,
Ivan Kokshaysky <ink@...assic.park.msu.ru>,
Matt Turner <mattst88@...il.com>, linux-alpha@...r.kernel.org
Subject: Re: Arches that don't support PREEMPT
On Tue, Sep 19 2023 at 15:21, Anton Ivanov wrote:
> On 19/09/2023 14:42, Peter Zijlstra wrote:
>> If you're working on one of them, then surely it's a simple matter of
>> working on adding CONFIG_PREEMPT support :-)
>
> In the case of UML adding preempt will be quite difficult. I looked at
> this a few years back.
What's so difficult about it?
Thanks,
tglx
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