From: David Miller <davem@davemloft.net>
To: akepner@sgi.com
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH] mlx4_core: module param to limit msix vec allocation
Date: Mon, 06 Sep 2010 12:51:23 -0700 (PDT) [thread overview]
Message-ID: <20100906.125123.104055684.davem@davemloft.net> (raw)
In-Reply-To: <20100906174245.GA12956@sgi.com>
From: Arthur Kepner <akepner@sgi.com>
Date: Mon, 6 Sep 2010 10:42:45 -0700
> On Fri, Sep 03, 2010 at 07:30:46PM -0700, David Miller wrote:
>> This also means there would have to be notifications sent to
>> drivers when the distribution and allocation policy of MSI-X
>> interrupts is changed. This is so that, for example, network
>> drivers can reconfigure their network queues for the new set
>> of MSI-X vectors available to them after the policy change.
>
> Hadn't considered this. Will have to add it.
BTW, reading this again made me consider another case that
needs to invoke a notifier.
Let's say that a policy specifies an even distribution of
MSI-X allocation amongst all present devices behind a PCI
domain. Well, if a PCI-E device hot-plugs you'll have to
do notifications for that too because a card might now be
able to get more of the MSI-X vectors it wants.
prev parent reply other threads:[~2010-09-06 19:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-26 17:06 [PATCH] mlx4_core: module param to limit msix vec allocation Arthur Kepner
2010-08-26 19:24 ` David Miller
2010-09-03 20:30 ` Arthur Kepner
2010-09-03 21:46 ` David Miller
2010-09-03 22:13 ` Arthur Kepner
2010-09-04 2:30 ` David Miller
2010-09-06 17:42 ` Arthur Kepner
2010-09-06 19:51 ` David Miller [this message]
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