From: Christoph Lameter <cl@gentwo.org>
To: Wonhyuk Yang <vvghjk1234@gmail.com>
Cc: linux-mm@kvack.org, Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [Question] The necessity of transaction ID in SLUB.
Date: Mon, 22 Nov 2021 10:25:56 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.22.394.2111221023420.202803@gentwo.de> (raw)
In-Reply-To: <CAEcHRTpdMX=dqTwNrw7wjdK_GhZ4gwkqtOYeMnNxt_JXr-eG6w@mail.gmail.com>
On Sun, 21 Nov 2021, Wonhyuk Yang wrote:
> 1) c->cpu_slab->page is unfrozen and frozen by another cpu. (is it possible?)
Yes.
> In the first case, cpu_slab structure can be different. But updating
> freelist isn't a problem.
It is a problem because the update can occur on a different processor
without the TID which can race with another update on another processor.
next prev parent reply other threads:[~2021-11-22 9:26 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-21 14:11 Wonhyuk Yang
2021-11-22 9:25 ` Christoph Lameter [this message]
2021-11-23 3:32 ` Wonhyuk Yang
2021-11-23 9:38 ` Christoph Lameter
2021-11-23 12:18 ` Wonhyuk Yang
2021-11-23 12:30 ` Wonhyuk Yang
2021-11-23 13:54 ` Christoph Lameter
2021-11-23 23:59 ` Wonhyuk Yang
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