From: Roland Dreier <rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
To: Alex Chiang <achiang-VXdhtT5mjnY@public.gmane.org>
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
justin.chen-VXdhtT5mjnY@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 0/7] Increase maximum Infiniband HCAs per-system
Date: Fri, 29 Jan 2010 14:54:36 -0800 [thread overview]
Message-ID: <adar5p8ldxv.fsf@roland-alpha.cisco.com> (raw)
In-Reply-To: <20100129214039.17745.38679.stgit-tBlMHHroXgg@public.gmane.org> (Alex Chiang's message of "Fri, 29 Jan 2010 14:44:57 -0700")
> Justin Chen discovered that Linux "only" supports 32 IB cards in
> a single system when testing a larger system with 40 cards and
> discovered that OFED only reported 32 HCAs.
>
> This patchset doubles the number of HCAs allowed per system in a
> backwards-compatible manner.
Looks like a really great start, some nice cleanups as well the added
functionality. I've been meaning to use pahole for a while...
Have you considered drivers/infiniband/core/user_mad.c and ucm.c? I
think user_mad.c is somewhat more important, as that is what allows an
adapter to be used for running the SM. So I think we're still left with
some potential issues around lots of adapters in one system. (I think
use of ucm by real apps is minimal to nonexistent, but someday we should
deal with that too)
- R.
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WARNING: multiple messages have this Message-ID (diff)
From: Roland Dreier <rdreier@cisco.com>
To: Alex Chiang <achiang@hp.com>
Cc: linux-rdma@vger.kernel.org, justin.chen@hp.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/7] Increase maximum Infiniband HCAs per-system
Date: Fri, 29 Jan 2010 14:54:36 -0800 [thread overview]
Message-ID: <adar5p8ldxv.fsf@roland-alpha.cisco.com> (raw)
In-Reply-To: <20100129214039.17745.38679.stgit@bob.kio> (Alex Chiang's message of "Fri, 29 Jan 2010 14:44:57 -0700")
> Justin Chen discovered that Linux "only" supports 32 IB cards in
> a single system when testing a larger system with 40 cards and
> discovered that OFED only reported 32 HCAs.
>
> This patchset doubles the number of HCAs allowed per system in a
> backwards-compatible manner.
Looks like a really great start, some nice cleanups as well the added
functionality. I've been meaning to use pahole for a while...
Have you considered drivers/infiniband/core/user_mad.c and ucm.c? I
think user_mad.c is somewhat more important, as that is what allows an
adapter to be used for running the SM. So I think we're still left with
some potential issues around lots of adapters in one system. (I think
use of ucm by real apps is minimal to nonexistent, but someday we should
deal with that too)
- R.
next prev parent reply other threads:[~2010-01-29 22:54 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-29 21:44 [PATCH 0/7] Increase maximum Infiniband HCAs per-system Alex Chiang
2010-01-29 21:44 ` Alex Chiang
2010-01-29 21:45 ` [PATCH 1/7] IB/uverbs: convert *cdev to cdev in struct ib_uverbs_device Alex Chiang
2010-01-29 21:45 ` [PATCH 3/7] IB/uverbs: use stack variable 'devnum' in ib_uverbs_add_one Alex Chiang
2010-01-29 21:45 ` [PATCH 4/7] IB/uverbs: use stack variable 'base' " Alex Chiang
[not found] ` <20100129214039.17745.38679.stgit-tBlMHHroXgg@public.gmane.org>
2010-01-29 21:45 ` [PATCH 2/7] IB/uverbs: remove dev_table Alex Chiang
2010-01-29 21:45 ` Alex Chiang
2010-01-29 21:45 ` [PATCH 5/7] IB/uverbs: increase maximum devices supported Alex Chiang
2010-01-29 21:45 ` Alex Chiang
2010-01-29 21:45 ` [PATCH 6/7] IB/uverbs: pack struct ib_uverbs_event_file tighter Alex Chiang
2010-01-29 21:45 ` Alex Chiang
2010-01-29 22:54 ` Roland Dreier [this message]
2010-01-29 22:54 ` [PATCH 0/7] Increase maximum Infiniband HCAs per-system Roland Dreier
[not found] ` <adar5p8ldxv.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-01-29 23:41 ` Alex Chiang
2010-01-29 23:41 ` Alex Chiang
[not found] ` <20100129234145.GC5177-e+Ta4ugHZmL3oGB3hsPCZA@public.gmane.org>
2010-01-30 7:13 ` Roland Dreier
2010-01-30 7:13 ` Roland Dreier
2010-02-01 12:55 ` Hal Rosenstock
2010-02-01 12:55 ` Hal Rosenstock
2010-01-29 21:45 ` [PATCH 7/7] IB/core: pack struct ib_device a little tighter Alex Chiang
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