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Mon, 23 Jan 2023 12:05:00 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by gentwo.de (Postfix) with ESMTP id E1544B001A1; Mon, 23 Jan 2023 12:05:00 +0100 (CET) Date: Mon, 23 Jan 2023 12:05:00 +0100 (CET) From: Christoph Lameter To: Hyeonggon Yoo <42.hyeyoo@gmail.com> cc: Vlastimil Babka , Andrew Morton , Pekka Enberg , David Rientjes , Joonsoo Kim , Roman Gushchin , Ingo Molnar , Johannes Weiner , Michal Hocko , Shakeel Butt , Muchun Song , Matthew Wilcox , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Valentin Schneider , Dennis Zhou , Tejun Heo Subject: Re: [PATCH mm-unstable] lib/Kconfig.debug: do not enable DEBUG_PREEMPT by default In-Reply-To: Message-ID: References: <20230121033942.350387-1-42.hyeyoo@gmail.com> <86e68d3b-b029-5e82-5bbc-e0ccc2ae1d36@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: 59D36A0014 X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: m47mq1u3zy8c64ynt4dheyuacpi9hfnh X-HE-Tag: 1674471903-599939 X-HE-Meta: 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 WyMsPVhS afPYqF75wPopMV5+xr+9nBtzd1fRtWyvjFbR1laXuDdGbROzz2ATtMogdEuoypHOtb2OzVvbSavzdm608YaInPwhVBZXVe3+yLdtZ8wFJVYfeJo1aup2mLExy4lG91sBG2WviULu0fNh62KSrwumYJwxkK2kAVIPLeZsmE11iho/cUjrqITRepteNafQagm9fKsSZvVz/1JdGfXGE4b/KK/bzCupLK3b3nh9yfZkQgew9goad1FqjLfuONTvtMRgJSLxmgOAi1BKf8wt92HsAwi/6wQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sat, 21 Jan 2023, Hyeonggon Yoo wrote: > Whew, I still get confused about who to Cc, thanks for adding them. > and I also didn't include the percpu memory allocator maintainers, who may > have opinion. let's add them too. Well looks ok to me. However, I thought most distro kernels disable PREEMPT anyways for performance reasons? So DEBUG_PREEMPT should be off as well. I guess that is why this has not been an issue so far.