Re: Memory ordering issue in LWLockRelease, WakeupWaiters, WALInsertSlotRelease

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От Ants Aasma
Тема Re: Memory ordering issue in LWLockRelease, WakeupWaiters, WALInsertSlotRelease
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Msg-id CA+CSw_s90knpKEmbYpFAV-zP5-=DPKzi3r-_oLReHreE8w62kw@mail.gmail.com
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Ответ на Re: Memory ordering issue in LWLockRelease, WakeupWaiters, WALInsertSlotRelease  (knizhnik <knizhnik@garret.ru>)
Ответы Re: Memory ordering issue in LWLockRelease, WakeupWaiters, WALInsertSlotRelease  (knizhnik <knizhnik@garret.ru>)
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On Wed, Feb 12, 2014 at 4:04 PM, knizhnik <knizhnik@garret.ru> wrote:
> Even if reordering was not done by compiler, it still can happen while
> execution.
> There is no warranty that two subsequent assignments will be observed by all
> CPU cores in the same order.

The x86 memory model (total store order) provides that guarantee in
this specific case.

Regards,
Ants Aasma
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