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Re: [Qemu-devel] [PATCH tcg-next] cputlb: read CPUTLBEntry.addr_write at
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] [PATCH tcg-next] cputlb: read CPUTLBEntry.addr_write atomically |
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Date: |
Tue, 16 Oct 2018 10:13:01 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 |
On 10/16/18 8:38 AM, Emilio G. Cota wrote:
> Updates can come from other threads, so readers that do not
> take tlb_lock must use atomic_read to avoid undefined
> behaviour (UB).
>
> This completes the conversion to tlb_lock. This conversion results
> on average in no performance loss, as the following experiments
> (run on an Intel i7-6700K CPU @ 4.00GHz) show.
Thanks for the quick turn-around. Queued.
r~