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From: Ingo Molnar <mingo@kernel.org>
To: Igor Mammedov <imammedo@redhat.com>
Cc: linux-kernel@vger.kernel.org, drjones@redhat.com,
	toshi.kani@hp.com, prarit@redhat.com,
	kirill.shutemov@linux.intel.com, JBeulich@suse.com,
	peterz@infradead.org, paul.gortmaker@windriver.com,
	seiji.aguchi@hds.com, bp@suse.de, hpa@zytor.com,
	mingo@redhat.com, x86@kernel.org, tglx@linutronix.de,
	riel@redhat.com
Subject: Re: [PATCH] abort secondary CPU bring-up gracefully if do_boot_cpu timed out on cpu_callin_mask
Date: Thu, 6 Mar 2014 08:08:32 +0100	[thread overview]
Message-ID: <20140306070832.GA1277@gmail.com> (raw)
In-Reply-To: <1394030723-15084-1-git-send-email-imammedo@redhat.com>


* Igor Mammedov <imammedo@redhat.com> wrote:

> Master CPU may timeout before cpu_callin_mask is set and cancel
> booting CPU, but being onlined CPU still continues to boot, sets
> cpu_active_mask (CPU_STARTING notifiers) and spins in
> check_tsc_sync_target() for master cpu to arrive. Following attempt
> to online another cpu hangs in stop_machine, initiated from here:

The changelog needs to prominently contain a description of the 
practical relevance of this patch: has the hang triggered on any 
system and under what circumstances, and did the patch resolve the 
hang, etc.?

Thanks,

	Ingo

  reply	other threads:[~2014-03-06  7:08 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-05 14:45 [PATCH] abort secondary CPU bring-up gracefully if do_boot_cpu timed out on cpu_callin_mask Igor Mammedov
2014-03-06  7:08 ` Ingo Molnar [this message]
2014-03-06  9:10   ` Igor Mammedov
2014-03-06 13:32     ` Ingo Molnar

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