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Re: [Qemu-devel] [RFC PATCH V7 07/19] protect TBContext with tb_lock.
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] [RFC PATCH V7 07/19] protect TBContext with tb_lock. |
Date: |
Tue, 11 Aug 2015 10:21:39 +0100 |
On 11 August 2015 at 09:34, Paolo Bonzini <address@hidden> wrote:
>
>
> On 11/08/2015 08:46, Frederic Konrad wrote:
>>> I think you should start easy and reuse the existing tb_lock code in
>>> cpu-exec.c:
>>
>> I think it's definitely not sufficient. Is user-mode multithread still
>> working today?
>
> For some definition of "working", yes. It's not sufficient, but it's a
> good start.
>
> The main problem with user-mode multithreading is that there is no clear
> lock hierarchy between mmap_lock and tb_lock. But this is not a problem
> for softmmu.
And also that we don't have a serious design for the locking at all.
I was hoping this would be something that would come out of the
multithreaded-TCG work...
-- PMM
- Re: [Qemu-devel] [RFC PATCH V7 06/19] add support for spin lock on POSIX systems exclusively, (continued)
- [Qemu-devel] [RFC PATCH V7 04/19] replace spinlock by QemuMutex., fred . konrad, 2015/08/10
- [Qemu-devel] [RFC PATCH V7 07/19] protect TBContext with tb_lock., fred . konrad, 2015/08/10
- Re: [Qemu-devel] [RFC PATCH V7 07/19] protect TBContext with tb_lock., Frederic Konrad, 2015/08/11
- Re: [Qemu-devel] [RFC PATCH V7 07/19] protect TBContext with tb_lock., Paolo Bonzini, 2015/08/11
- Re: [Qemu-devel] [RFC PATCH V7 07/19] protect TBContext with tb_lock.,
Peter Maydell <=
- Re: [Qemu-devel] [RFC PATCH V7 07/19] protect TBContext with tb_lock., Paolo Bonzini, 2015/08/11
Re: [Qemu-devel] [RFC PATCH V7 07/19] protect TBContext with tb_lock., Frederic Konrad, 2015/08/12
[Qemu-devel] [RFC PATCH V7 08/19] tcg: remove tcg_halt_cond global variable., fred . konrad, 2015/08/10
[Qemu-devel] [RFC PATCH V7 09/19] Drop global lock during TCG code execution, fred . konrad, 2015/08/10