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Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, al
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me |
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Date: |
Fri, 17 Jul 2015 02:17:25 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 |
On 17/07/2015 00:06, Paolo Bonzini wrote:
>
>
> On 16/07/2015 21:05, Richard W.M. Jones wrote:
>> Sorry to spoil things, but I'm still seeing this bug, although it is
>> now a lot less frequent with your patch. I would estimate it happens
>> more often than 1 in 5 runs with qemu.git, and probably 1 in 200 runs
>> with qemu.git + the v2 patch series.
>>
>> It's the exact same hang in both cases.
>>
>> Is it possible that this patch doesn't completely close any race?
>>
>> Still, it is an improvement, so there is that.
>
> I would guess instead that there are two separate bugs, but it's not
> impossible that it's still there.
Reproduced after ~80 runs...
Paolo
- [Qemu-devel] [PATCH v2 1/3] tests: remove irrelevant assertions from test-aio, (continued)
- [Qemu-devel] [PATCH v2 1/3] tests: remove irrelevant assertions from test-aio, Paolo Bonzini, 2015/07/16
- [Qemu-devel] [PATCH v2 3/3] AioContext: fix broken ctx->dispatching optimization, Paolo Bonzini, 2015/07/16
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Kevin Wolf, 2015/07/16
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Richard W.M. Jones, 2015/07/16
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Richard W.M. Jones, 2015/07/16
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Paolo Bonzini, 2015/07/16
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Paolo Bonzini, 2015/07/17
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Marc Zyngier, 2015/07/17
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Laszlo Ersek, 2015/07/17
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Marc Zyngier, 2015/07/17
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Richard W.M. Jones, 2015/07/17
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Marc Zyngier, 2015/07/17
- Re: [Qemu-devel] [PATCH v2 0/3] AioContext: ctx->dispatching is dead, all hail ctx->notify_me, Laszlo Ersek, 2015/07/17