linux-kernel - Re: [PATCH 1/7] containers (V7): Generic container system abstracted from cpusets code

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: <6599ad830702121146y41c8856cm4a85943aa950771f@mail.gmail.com>
Date:	Mon, 12 Feb 2007 11:46:20 -0800
From:	"Paul Menage" <menage@...gle.com>
To:	vatsa@...ibm.com
Cc:	akpm@...l.org, pj@....com, sekharan@...ibm.com, dev@...ru,
	xemul@...ru, serue@...ibm.com, ebiederm@...ssion.com,
	ckrm-tech@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	rohitseth@...gle.com, mbligh@...gle.com, winget@...gle.com,
	containers@...ts.osdl.org, devel@...nvz.org
Subject: Re: [PATCH 1/7] containers (V7): Generic container system abstracted from cpusets code

On 2/12/07, Paul Menage <menage@...gle.com> wrote:
> reaches zero. RCU is still fine for reading the container_group
> pointers, but it's no good for updating them, since by the time you
> update it it may no longer be your container_group structure, and may
> instead be about to be deleted as soon as the other thread's
> rcu_synchronize() completes.

On further reflection, this probably would be safe after all. Since we
don't call put_container_group() in attach_task() until after
synchronize_rcu() completes, that implies that a container_group_get()
from the RCU section would have already completed. So we should be
fine.

Paul
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/