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: Fri, 03 Sep 2010 19:30:46 -0700 (PDT) [thread overview]
Message-ID: <20100903.193046.184840227.davem@davemloft.net> (raw)
In-Reply-To: <20100903221303.GS2464@sgi.com>
From: Arthur Kepner <akepner@sgi.com>
Date: Fri, 3 Sep 2010 15:13:03 -0700
> On Fri, Sep 03, 2010 at 02:46:58PM -0700, David Miller wrote:
>> No, you really can't do it this way, IRQ allocation management has to
>> be in the kernel.
>
> Really? I was specifically trying to avoid that, and let the
> policy about interrupt assignment be done in a user process.
>
> Do you have any specific ideas about how that'd look?
Likely there would be a set of policies just like the cpu
power management layer we have. And there would be a default,
and userland could override the default.
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.
next prev parent reply other threads:[~2010-09-04 2:30 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 [this message]
2010-09-06 17:42 ` Arthur Kepner
2010-09-06 19:51 ` David Miller
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