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Re: [PATCH 1/2] multifd: Fix a race on reading MultiFDPages_t.block
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From: |
Juan Quintela |
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Subject: |
Re: [PATCH 1/2] multifd: Fix a race on reading MultiFDPages_t.block |
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Date: |
Thu, 02 Feb 2023 21:13:33 +0100 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) |
Zhenzhong Duan <zhenzhong.duan@intel.com> wrote:
> In multifd_queue_page() MultiFDPages_t.block is checked twice.
> Between the two checks, MultiFDPages_t.block may be reset to NULL
> by multifd thread. This lead to the 2nd check always true then a
> redundant page submitted to multifd thread again.
>
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
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