From: Rob Landley <rlandley@parallels.com>
To: "Kirill A. Shutemov" <kas@openvz.org>
Cc: Rob Landley <rob@landley.net>,
Trond Myklebust <Trond.Myklebust@netapp.com>,
"J. Bruce Fields" <bfields@fieldses.org>,
Neil Brown <neilb@suse.de>, Pavel Emelyanov <xemul@parallels.com>,
<linux-nfs@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>, <netdev@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 00/12] make rpc_pipefs be mountable multiple time
Date: Thu, 30 Dec 2010 04:05:07 -0600 [thread overview]
Message-ID: <4D1C5953.6020200@parallels.com> (raw)
In-Reply-To: <20101230094433.GB29697@shutemov.name>
On 12/30/2010 03:44 AM, Kirill A. Shutemov wrote:
>>> If no rpcmount mountoption, no rpc_pipefs was found at
>>> '/var/lib/nfs/rpc_pipefs' and we are in init's mount namespace, we use
>>> init_rpc_pipefs.
>>
>> It's the "we are in init's mount namespace" that I was wondering about.
>>
>> So if I naievely chroot, nfs mount stops working the way it did before I
>> chrooted unless I do an extra setup step?
>
> No. It will work as before since you are still in init's mount namespace.
> Creating new mount namespace changes rules.
Ah, CLONE_NEWNS and then you need /var/lib/nfs/rpc_pipefs. Got it.
I'm kind of surprised that the kernel cares about a specific path under
/var/lib. (Seems like policy in the kernel somehow.) Can't it just
check the current process's mount list to see if an instance of
rpc_pipefs is mounted in the current namespace the way lxc looks for
cgroups? Or are there potential performance/scalability issues with that?
Rob
next prev parent reply other threads:[~2010-12-30 10:05 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-29 13:14 [PATCH v2 00/12] make rpc_pipefs be mountable multiple time Kirill A. Shutemov
2010-12-29 13:14 ` Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 01/12] sunrpc: mount rpc_pipefs on initialization Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 02/12] sunrpc: introduce init_rpc_pipefs Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 03/12] sunrpc: push init_rpc_pipefs up to rpc_create() callers Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 04/12] sunrpc: tag svc_serv with rpc_pipefs mount point Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 05/12] sunrpc: get rpc_pipefs mount point for svc_serv from callers Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 06/12] lockd: get rpc_pipefs mount point " Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 07/12] sunrpc: get rpc_pipefs mount point for rpcb_create[_local] " Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 08/12] sunrpc: tag pipefs field of cache_detail with rpc_pipefs mount point Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 09/12] nfs: per-rpc_pipefs dns cache Kirill A. Shutemov
2010-12-29 13:14 ` Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 10/12] sunrpc: introduce get_rpc_pipefs() Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 11/12] nfs: introduce mount option 'rpcmount' Kirill A. Shutemov
2010-12-29 13:14 ` Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 12/12] sunrpc: make rpc_pipefs be mountable multiple times Kirill A. Shutemov
2010-12-30 2:13 ` [PATCH v2 00/12] make rpc_pipefs be mountable multiple time Rob Landley
2010-12-30 2:13 ` Rob Landley
2010-12-30 8:51 ` Kirill A. Shutemov
2010-12-30 9:10 ` Rob Landley
2010-12-30 9:10 ` Rob Landley
2010-12-30 9:44 ` Kirill A. Shutemov
2010-12-30 9:44 ` Kirill A. Shutemov
2010-12-30 10:05 ` Rob Landley [this message]
2010-12-30 10:44 ` Kirill A. Shutemov
2010-12-30 10:44 ` Kirill A. Shutemov
2010-12-30 11:05 ` Rob Landley
2010-12-30 11:05 ` Rob Landley
2010-12-30 11:45 ` Kirill A. Shutemov
2010-12-30 11:45 ` Kirill A. Shutemov
2010-12-30 12:52 ` Rob Landley
2010-12-31 13:03 ` Kirill A. Shutemov
2011-01-03 16:53 ` Kirill A. Shutemov
2011-01-03 20:38 ` Rob Landley
2011-01-03 20:38 ` Rob Landley
2010-12-31 16:54 ` Trond Myklebust
2010-12-31 16:54 ` Trond Myklebust
2011-01-03 20:48 ` Rob Landley
2011-01-05 11:41 ` Al Viro
2011-01-05 11:41 ` Al Viro
2011-01-05 13:40 ` Kirill A. Shutemov
2011-01-05 13:40 ` Kirill A. Shutemov
2011-01-07 11:12 ` Kirill A. Shutemov
2011-01-07 11:19 ` Kirill A. Shutemov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D1C5953.6020200@parallels.com \
--to=rlandley@parallels.com \
--cc=Trond.Myklebust@netapp.com \
--cc=bfields@fieldses.org \
--cc=davem@davemloft.net \
--cc=kas@openvz.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nfs@vger.kernel.org \
--cc=neilb@suse.de \
--cc=netdev@vger.kernel.org \
--cc=rob@landley.net \
--cc=xemul@parallels.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.