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Re: [Qemu-devel] [RFC v3 16/19] tcg: move locking for tb_invalidate_phys
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From: |
Sergey Fedorov |
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Subject: |
Re: [Qemu-devel] [RFC v3 16/19] tcg: move locking for tb_invalidate_phys_page_range up |
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Date: |
Tue, 28 Jun 2016 22:51:33 +0300 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 |
On 28/06/16 22:43, Sergey Fedorov wrote:
> On 03/06/16 23:40, Alex Bennée wrote:
>> While we previously assumed an existing memory lock protected the page
>> look up in the MTTCG SoftMMU case the memory lock is provided by the
>> tb_lock. As a result we push the taking of this lock up the call tree.
>> This requires a slightly different entry for the SoftMMU and user-mode
>> cases from tb_invalidate_phys_range.
> Sorry, I can't understand the description for the patch :( Some
> rewording might be helpful, if you don't mind.
Well, do I understand it right that we're gonna use tb_lock to protect
'l1_map' and PageDesc structures in softmmu mode?
Regards,
Sergey
- [Qemu-devel] [RFC v3 09/19] target-arm/arm-powerctl: wake up sleeping CPUs, (continued)
- [Qemu-devel] [RFC v3 09/19] target-arm/arm-powerctl: wake up sleeping CPUs, Alex Bennée, 2016/06/03
- [Qemu-devel] [RFC v3 10/19] tcg: cpus rm tcg_exec_all(), Alex Bennée, 2016/06/03
- [Qemu-devel] [RFC v3 18/19] tcg: Ensure safe TB lookup out of 'tb_lock', Alex Bennée, 2016/06/03
- [Qemu-devel] [RFC v3 17/19] tcg: enable thread-per-vCPU, Alex Bennée, 2016/06/03
- [Qemu-devel] [RFC v3 15/19] tcg: drop global lock during TCG code execution, Alex Bennée, 2016/06/03
- [Qemu-devel] [RFC v3 19/19] cpu-exec: remove tb_lock from the hot-path, Alex Bennée, 2016/06/03
- [Qemu-devel] [RFC v3 16/19] tcg: move locking for tb_invalidate_phys_page_range up, Alex Bennée, 2016/06/03
- Re: [Qemu-devel] [RFC v3 00/19] Base enabling patches for MTTCG, Pranith Kumar, 2016/06/04