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From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Nir Muchtar <nirm-smomgflXvOZWk0Htik3J/w@public.gmane.org>
Cc: rolandd-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org,
	linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	monis-smomgflXvOZWk0Htik3J/w@public.gmane.org,
	ogerlitz-smomgflXvOZWk0Htik3J/w@public.gmane.org
Subject: Re: [PATCH V3 5/6] RDMA CM: Save Owning PID
Date: Mon, 20 Dec 2010 14:54:33 -0700	[thread overview]
Message-ID: <20101220215433.GB12090@obsidianresearch.com> (raw)
In-Reply-To: <1292769382.2369.2145.camel@nirm-desktop>

On Sun, Dec 19, 2010 at 04:36:22PM +0200, Nir Muchtar wrote:
> On Tue, 2010-12-14 at 11:34 -0700, Jason Gunthorpe wrote:
> > On Mon, Dec 13, 2010 at 06:22:49PM +0200, Nir Muchtar wrote:
> > > Save owning PID to id-priv when creating id's/accepting connections.
> > 
> > This should be called creator_pid, not owner - to avoid confusion.

> But it's meant to be the owner and not necessarily the creator.
> That's why its value is replaced in rdma_accept.

There is no such thing as a single owner for a fd based resource
like a RDMA_CM ID. The FD can be held by multiple processes. This is
why the best you can do by storing PIDs at certain times is to
constuct a creator_pid. 

Owner pid can only be determined by cross-referencing the inode of the
FD that holds the ownership of the object to the processes that hold
that FD.

Jason
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  reply	other threads:[~2010-12-20 21:54 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-12-13 16:22 [PATCH V3 0/6] IB Netlink Interface and RDMA CM exports Nir Muchtar
     [not found] ` <1292257370-24391-1-git-send-email-nirm-smomgflXvOZWk0Htik3J/w@public.gmane.org>
2010-12-13 16:22   ` [PATCH V3 1/6] IB Netlink Infrastructure Nir Muchtar
     [not found]     ` <1292257370-24391-2-git-send-email-nirm-smomgflXvOZWk0Htik3J/w@public.gmane.org>
2010-12-14 18:34       ` Jason Gunthorpe
     [not found]         ` <20101214183401.GC2506-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-12-19 14:34           ` Nir Muchtar
2010-12-13 16:22   ` [PATCH V3 2/6] IB Core: Error Handler Nir Muchtar
2010-12-13 16:22   ` [PATCH V3 3/6] IB Core Run Netlink Nir Muchtar
2010-12-13 16:22   ` [PATCH V3 4/6] RDMA CM: Export State Enum Nir Muchtar
2010-12-13 16:22   ` [PATCH V3 5/6] RDMA CM: Save Owning PID Nir Muchtar
     [not found]     ` <1292257370-24391-6-git-send-email-nirm-smomgflXvOZWk0Htik3J/w@public.gmane.org>
2010-12-14 18:34       ` Jason Gunthorpe
     [not found]         ` <20101214183458.GD2506-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-12-19 14:36           ` Nir Muchtar
2010-12-20 21:54             ` Jason Gunthorpe [this message]
     [not found]               ` <20101220215433.GB12090-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-12-21 15:05                 ` Nir Muchtar
2010-12-21 18:10                   ` Jason Gunthorpe
2010-12-21 19:43                     ` Nir Muchtar
2010-12-21 20:33                       ` Nir Muchtar
     [not found]                       ` <7E95F01E94AB484F83061FCFA35B39F8794E3F-QfUkFaTmzUSUvQqKE/ONIwC/G2K4zDHf@public.gmane.org>
2010-12-21 20:36                         ` Jason Gunthorpe
     [not found]                           ` <20101221203627.GE12090-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-12-22 16:03                             ` Nir Muchtar
2010-12-22 22:10                               ` Jason Gunthorpe
     [not found]                     ` <20101221181043.GD12090-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-12-23 12:21                       ` Or Gerlitz
2010-12-13 16:22   ` [PATCH V3 6/6] RDMA CM: Netlink Client Nir Muchtar
     [not found]     ` <1292257370-24391-7-git-send-email-nirm-smomgflXvOZWk0Htik3J/w@public.gmane.org>
2010-12-14 18:45       ` Jason Gunthorpe
     [not found]         ` <20101214184514.GE2506-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-12-19 14:47           ` Nir Muchtar
2010-12-20  7:24             ` Or Gerlitz
2010-12-20 19:16             ` Hefty, Sean
2010-12-20 21:52             ` Jason Gunthorpe
2010-12-14 18:27   ` [PATCH V3 0/6] IB Netlink Interface and RDMA CM exports Jason Gunthorpe
     [not found]     ` <20101214182746.GB2506-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-12-19 14:30       ` Nir Muchtar
2010-12-20 21:55         ` Jason Gunthorpe

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