From: Oleg Nesterov <oleg@redhat.com>
To: Gautham R Shenoy <ego@in.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>,
linux-kernel@vger.kernel.org, travis@sgi.com,
Ingo Molnar <mingo@elte.hu>
Subject: do_boot_cpu can deadlock?
Date: Thu, 23 Oct 2008 19:02:12 +0200 [thread overview]
Message-ID: <20081023170212.GA22599@redhat.com> (raw)
In-Reply-To: <20081023163517.GB21008@redhat.com>
Hmm. arch/x86/kernel/smpboot.c:do_boot_cpu() can deadlock ?
It is called from _cpu_up() under cpu_hotplug_begin(), and it
waits for c_idle.work. Again, if we have the pending work which
needs get_online_cpus() we seem to have problems.
Oleg.
next prev parent reply other threads:[~2008-10-23 17:01 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-23 16:55 [PATCH 1/7] work_on_cpu: helper for doing task on a CPU Rusty Russell
2008-10-23 7:22 ` Gautham R Shenoy
2008-10-23 9:40 ` Oleg Nesterov
2008-10-23 14:36 ` Gautham R Shenoy
2008-10-23 16:35 ` Oleg Nesterov
2008-10-23 17:02 ` Oleg Nesterov [this message]
2008-10-23 18:21 ` do_boot_cpu can deadlock? Gautham R Shenoy
2008-10-23 18:49 ` Cyrill Gorcunov
2008-10-24 9:33 ` Oleg Nesterov
2008-10-24 9:53 ` Gautham R Shenoy
2008-10-24 10:51 ` Oleg Nesterov
2008-10-24 3:04 ` [PATCH 1/7] work_on_cpu: helper for doing task on a CPU Rusty Russell
2008-10-24 7:21 ` Gautham R Shenoy
2008-10-24 10:29 ` Oleg Nesterov
2008-10-24 11:18 ` Rusty Russell
2008-10-24 11:40 ` Gautham R Shenoy
2008-10-24 13:25 ` Oleg Nesterov
2008-10-24 13:41 ` Gautham R Shenoy
2008-10-24 14:23 ` Oleg Nesterov
2008-10-23 15:10 ` Rusty Russell
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