linux-kernel - Re: [PATCH] rcu: Release per-cpu krcp page cache when CPU going offline

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20210121202635.GB2454@pc638.lan>
Date:   Thu, 21 Jan 2021 21:26:35 +0100
From:   Uladzislau Rezki <urezki@...il.com>
To:     qiang.zhang@...driver.com
Cc:     "Paul E. McKenney" <paulmck@...nel.org>, rcu@...r.kernel.org,
        linux-kernel@...r.kernel.org, urezki@...il.com
Subject: Re: [PATCH] rcu: Release per-cpu krcp page cache when CPU going
 offline

Hello, Qiang,

> On Thu, Jan 21, 2021 at 02:49:49PM +0800, qiang.zhang@...driver.com wrote:
> > From: Zqiang <qiang.zhang@...driver.com>
> > 
> > If CPUs go offline, the corresponding krcp's page cache can
> > not be use util the CPU come back online, or maybe the CPU
> > will never go online again, this commit therefore free krcp's
> > page cache when CPUs go offline.
> > 
> > Signed-off-by: Zqiang <qiang.zhang@...driver.com>
> 
Do you consider it as an issue? We have 5 pages per CPU, that is 20480 bytes. 

--
Vlad Rezki