linux-kernel - Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init cgroupns

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: <20151202170551.GE19878@mtj.duckdns.org>
Date:	Wed, 2 Dec 2015 12:05:51 -0500
From:	Tejun Heo <tj@...nel.org>
To:	"Serge E. Hallyn" <serge.hallyn@...ntu.com>
Cc:	serge@...lyn.com, linux-kernel@...r.kernel.org,
	adityakali@...gle.com, linux-api@...r.kernel.org,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	lxc-devel@...ts.linuxcontainers.org, akpm@...ux-foundation.org,
	ebiederm@...ssion.com
Subject: Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init
 cgroupns

On Wed, Dec 02, 2015 at 11:02:39AM -0600, Serge E. Hallyn wrote:
> On Wed, Dec 02, 2015 at 11:58:39AM -0500, Tejun Heo wrote:
> > On Wed, Dec 02, 2015 at 10:56:37AM -0600, Serge E. Hallyn wrote:
> > > Can it be flushed when we know that the cgroup is being pinned by
> > > a css_set?  (There's either a task or a cgroup_namespace pinning it
> > > or we wouldn't get here)
> > 
> > Yeap, it can be flushed.  There's no ref coming out of cgroup to the
> > vfs objects.
> 
> Ok, thanks.  Still seems to me to be more work to actually walk the
> path ourselves, but I'll go that route and see what it looks like :)

I just dislike having two separate paths instantiating the same
objects and would prefer doing it the same way userland would do if
that isn't too complex but yeah it might turn out to be a lot more
work.

Thanks a lot!

-- 
tejun
--
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/