From: Peter Zijlstra <peterz@infradead.org> To: Ingo Molnar <mingo@kernel.org> Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>, mpe@ellerman.id.au, tglx@linutronix.de, rjw@rjwysocki.net, nicolas.pitre@linaro.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH V2] clockevents: Fix cpu down race for hrtimer based broadcasting Date: Thu, 2 Apr 2015 14:02:56 +0200 [thread overview] Message-ID: <20150402120256.GV23123@twins.programming.kicks-ass.net> (raw) In-Reply-To: <20150402104226.GB21105@gmail.com> On Thu, Apr 02, 2015 at 12:42:27PM +0200, Ingo Molnar wrote: > So why not use a suitable CPU_DOWN* notifier for this, instead of open > coding it all into a random place in the hotplug machinery? Because notifiers are crap? ;-) Its entirely impossible to figure out what's happening to core code in hotplug. You need to go chase down and random order notifier things. I'm planning on taking out many of the core hotplug notifiers and hard coding their callbacks into the hotplug code. That way at least its clear wtf happens when. > Also, I improved the changelog (attached below), but decided against > applying it until these questions are cleared - please use that for > future versions of this patch. > Fixes: http://linuxppc.10917.n7.nabble.com/offlining-cpus-breakage-td88619.html You forgot to fix the Fixes line ;-) My copy has: Fixes: 5d1638acb9f6 ("tick: Introduce hrtimer based broadcast")
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org> To: Ingo Molnar <mingo@kernel.org> Cc: nicolas.pitre@linaro.org, rjw@rjwysocki.net, linux-kernel@vger.kernel.org, Preeti U Murthy <preeti@linux.vnet.ibm.com>, tglx@linutronix.de, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH V2] clockevents: Fix cpu down race for hrtimer based broadcasting Date: Thu, 2 Apr 2015 14:02:56 +0200 [thread overview] Message-ID: <20150402120256.GV23123@twins.programming.kicks-ass.net> (raw) In-Reply-To: <20150402104226.GB21105@gmail.com> On Thu, Apr 02, 2015 at 12:42:27PM +0200, Ingo Molnar wrote: > So why not use a suitable CPU_DOWN* notifier for this, instead of open > coding it all into a random place in the hotplug machinery? Because notifiers are crap? ;-) Its entirely impossible to figure out what's happening to core code in hotplug. You need to go chase down and random order notifier things. I'm planning on taking out many of the core hotplug notifiers and hard coding their callbacks into the hotplug code. That way at least its clear wtf happens when. > Also, I improved the changelog (attached below), but decided against > applying it until these questions are cleared - please use that for > future versions of this patch. > Fixes: http://linuxppc.10917.n7.nabble.com/offlining-cpus-breakage-td88619.html You forgot to fix the Fixes line ;-) My copy has: Fixes: 5d1638acb9f6 ("tick: Introduce hrtimer based broadcast")
next prev parent reply other threads:[~2015-04-02 12:03 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-03-30 9:29 [PATCH V2] clockevents: Fix cpu down race for hrtimer based broadcasting Preeti U Murthy 2015-03-31 3:11 ` Nicolas Pitre 2015-03-31 3:11 ` Nicolas Pitre 2015-04-02 10:42 ` Ingo Molnar 2015-04-02 10:42 ` Ingo Molnar 2015-04-02 11:25 ` Preeti U Murthy 2015-04-02 11:25 ` Preeti U Murthy 2015-04-02 11:31 ` Ingo Molnar 2015-04-02 11:31 ` Ingo Molnar 2015-04-02 11:44 ` Preeti U Murthy 2015-04-02 12:02 ` Peter Zijlstra [this message] 2015-04-02 12:02 ` Peter Zijlstra 2015-04-02 12:12 ` Ingo Molnar 2015-04-02 12:12 ` Ingo Molnar 2015-04-02 12:44 ` Preeti U Murthy 2015-04-02 12:44 ` Preeti U Murthy 2015-04-02 12:58 ` Peter Zijlstra 2015-04-02 12:58 ` Peter Zijlstra 2015-04-02 14:30 ` [tip:timers/core] clockevents: Fix cpu_down() " tip-bot for Preeti U Murthy 2015-04-03 10:38 ` Preeti U Murthy 2015-04-03 10:50 ` Ingo Molnar 2015-04-06 4:28 ` Preeti U Murthy
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20150402120256.GV23123@twins.programming.kicks-ass.net \ --to=peterz@infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linuxppc-dev@lists.ozlabs.org \ --cc=mingo@kernel.org \ --cc=mpe@ellerman.id.au \ --cc=nicolas.pitre@linaro.org \ --cc=preeti@linux.vnet.ibm.com \ --cc=rjw@rjwysocki.net \ --cc=tglx@linutronix.de \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.