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Re: [Qemu-devel] [RFC v3 16/19] tcg: move locking for tb_invalidate_phys

From: Sergey Fedorov
Subject: Re: [Qemu-devel] [RFC v3 16/19] tcg: move locking for tb_invalidate_phys_page_range up
Date: Tue, 28 Jun 2016 22:51:33 +0300
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?


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