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From: Hao Xu <>
To: Pavel Begunkov <>, Jens Axboe <>
Cc:, Joseph Qi <>
Subject: Re: [PATCH] io_uring: don't free request to slab
Date: Wed, 25 Aug 2021 23:38:49 +0800	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

在 2021/8/25 下午9:28, Pavel Begunkov 写道:
> On 8/25/21 12:40 PM, Hao Xu wrote:
>> It's not neccessary to free the request back to slab when we fail to
>> get sqe, just update state->free_reqs pointer.
> It's a bit hackish because depends on the request being drawn
> from the array in a particular way. How about returning it
It seems a req is always allocated from state->reqs, so it should be
ok? I actually didn't understand 'hackish' here, do you mean
io_submit_sqes() shouldn't move state->free_reqs which is req caches'
internal implementation?
> into state->free_list. That thing is as cold as it can get,
> only buggy apps can hit it.

  reply	other threads:[~2021-08-25 15:38 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-25 11:40 [PATCH] io_uring: don't free request to slab Hao Xu
2021-08-25 13:28 ` Pavel Begunkov
2021-08-25 15:38   ` Hao Xu [this message]
2021-08-25 16:02     ` Pavel Begunkov

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