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xen-devel
Re: [Xen-devel] Re: [Xen-ia64-devel] Weekly benchmark results [ww24]
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To: |
Atsushi SAKAI <sakaia@xxxxxxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] Re: [Xen-ia64-devel] Weekly benchmark results [ww24] |
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From: |
Steven Hand <Steven.Hand@xxxxxxxxxxxx> |
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Date: |
Tue, 20 Jun 2006 11:06:36 +0100 |
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Cc: |
xen-devel@xxxxxxxxxxxxxxxxxxx, "yo.fujita" <yo.fujita@xxxxxxxxxxxxxxxx>, "'You, Yongkang'" <yongkang.you@xxxxxxxxx>, Steven.Hand@xxxxxxxxxxxx, 'Alex Williamson' <alex.williamson@xxxxxx>, xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
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Tue, 20 Jun 2006 03:07:01 -0700 |
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www-data@xxxxxxxxxxxxxxxxxx |
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Message from Atsushi SAKAI <sakaia@xxxxxxxxxxxxxx> of "Tue, 20 Jun 2006 14:26:04 +0900." <200606200526.k5K5QWlK009993@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> |
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>==================
>STATUS
>==================
>I do the heavy load test of create/destroy.
>CREDIT scheduler(cshed_schedule) checks BUG_ON(!vcpu_running) at the end of co
de.
>It makes error.
>The reason is that
>atomic_inc(&v->pausecnt)@vcpu_pause() is called without lock.
>(spin_lock(&schedule_data[cpu].schedule_lock))
>This lock-less "pausecnt" makes vcpu_running state changing
>during the lock of
>spin_lock_irq(&schedule_data[cpu].schedule_lock)@__enter_schduler().
>The code of cshed_schedule exists within this lock.
Thanks for this - we have also reproduced.
The assertation was in fact bogus as you surmised. Have checked in a
fix.
cheers,
S.
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