From: Rob Landley <rlandley@parallels•com>
To: Trond Myklebust <Trond.Myklebust@netapp•com>
Cc: "Kirill A. Shutemov" <kas@openvz•org>,
Rob Landley <rob@landley•net>,
"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: Mon, 3 Jan 2011 14:48:47 -0600 [thread overview]
Message-ID: <4D22362F.2040604@parallels.com> (raw)
In-Reply-To: <1293814441.2980.4.camel@heimdal.trondhjem.org>
On 12/31/2010 10:54 AM, Trond Myklebust wrote:
>> 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?
>
> The kernel doesn't give a damn about the /var/lib/nfs/rpc_pipefs bit.
> That's all for the benefit of the userland utilities.
Are you saying that if you go into a container and that mount point
doesn't exist, the kernel will still be able to find and use rpc_pipefs?
Without userspace creating a specific magic path and mounting a
filesystem on it?
If so, I misread the patch...
Rob
next prev parent reply other threads:[~2011-01-03 20:48 UTC|newest]
Thread overview: 31+ 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 ` [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
[not found] ` <1293628470-28386-1-git-send-email-kas-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>
2010-12-29 13:14 ` [PATCH v2 09/12] nfs: per-rpc_pipefs dns cache Kirill A. Shutemov
2010-12-29 13:14 ` [PATCH v2 11/12] nfs: introduce mount option 'rpcmount' Kirill A. Shutemov
2010-12-30 2:13 ` [PATCH v2 00/12] make rpc_pipefs be mountable multiple time Rob Landley
2010-12-30 8:51 ` Kirill A. Shutemov
[not found] ` <20101230085139.GA29697-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>
2010-12-30 9:10 ` Rob Landley
[not found] ` <4D1C4C7C.6050606-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2010-12-30 9:44 ` Kirill A. Shutemov
2010-12-30 10:05 ` Rob Landley
[not found] ` <4D1C5953.6020200-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2010-12-30 10:44 ` Kirill A. Shutemov
[not found] ` <20101230104416.GA31824-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>
2010-12-30 11:05 ` Rob Landley
[not found] ` <AANLkTim2QrkSW0HufD5wp=-8ikwydN5SUS+fdWK6JHqb-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
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
[not found] ` <20101231130329.GA3610-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>
2011-01-03 20:38 ` Rob Landley
2010-12-31 16:54 ` Trond Myklebust
2011-01-03 20:48 ` Rob Landley [this message]
2011-01-05 11:41 ` Al Viro
[not found] ` <20110105114155.GN19804-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2011-01-05 13:40 ` Kirill A. Shutemov
2011-01-07 11:12 ` Kirill A. Shutemov
2011-01-07 11:19 ` 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 12/12] sunrpc: make rpc_pipefs be mountable multiple times Kirill A. Shutemov
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