From: Or Gerlitz <ogerlitz-smomgflXvOZWk0Htik3J/w@public.gmane.org>
To: Roland Dreier <rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
Cc: linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Jack Morgenstein <jackm-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org>
Subject: Re: [PATCH] IB/mlx4: fix post_recv wq overflow check
Date: Tue, 19 Jan 2010 17:48:17 +0200 [thread overview]
Message-ID: <4B55D441.5050000@voltaire.com> (raw)
In-Reply-To: <adamy0kpo1m.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
Roland Dreier wrote:
> I do think it is quite common to see this WQ overflow check trigger, even for kernel code
mmm, why is that common? typically there's a higher layer to which the
IB ULP advertises some sort of maximal number of credits (e.g in the
SCSI case, iser and srp specify the maximal number of commands in the
scsi host template) or the ULP informs a higher layer that no more sends
can be done (e.g IPoIB calling netif_stop_queue once it sense that the
QP filled, etc).
Or.
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next prev parent reply other threads:[~2010-01-19 15:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-23 15:28 [PATCH] IB/mlx4: fix post_recv wq overflow check Or Gerlitz
[not found] ` <Pine.LNX.4.64.0912231727040.19295-aDiYczhfhVLdX2U7gxhm1tBPR1lH4CV8@public.gmane.org>
2010-01-06 20:51 ` Roland Dreier
[not found] ` <adapr5nt0rc.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-01-07 7:46 ` Or Gerlitz
[not found] ` <4B45913C.10405-hKgKHo2Ms0FWk0Htik3J/w@public.gmane.org>
2010-01-07 7:53 ` Roland Dreier
[not found] ` <adaocl6qrjc.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-01-07 9:01 ` Or Gerlitz
[not found] ` <4B45A2E5.2070301-smomgflXvOZWk0Htik3J/w@public.gmane.org>
2010-01-11 17:08 ` Roland Dreier
[not found] ` <adamy0kpo1m.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-01-19 15:48 ` Or Gerlitz [this message]
[not found] ` <4B55D441.5050000-smomgflXvOZWk0Htik3J/w@public.gmane.org>
2010-01-19 16:13 ` Roland Dreier
[not found] ` <ada8wbugjio.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-01-20 15:47 ` Or Gerlitz
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