From: "Richard B. Johnson" <root@chaos.analogic.com>
To: Davide Rossetti <davide.rossetti@roma1.infn.it>
Cc: linux-kernel@vger.kernel.org
Subject: Re: MSI to memory?
Date: Wed, 7 Jul 2004 09:15:00 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.53.0407070909250.17962@chaos> (raw)
In-Reply-To: <40EBED33.3050707@roma1.infn.it>
On Wed, 7 Jul 2004, Davide Rossetti wrote:
> Rajesh Shah wrote:
>
> > What type of usage model did you have in mind to have the
> >
> >device write to memory instead of using MSI for interrupts?
> >
> >
> for instance for a fast wake-up trick. the driver loops on a memory
> location until the MSI write access changes the memory content...
Who (another cpu??) writes to memory while your CPU is wasting its
time looping? Maybe MSI stands for Major Service Interruption?
Cheers,
Dick Johnson
Penguin : Linux version 2.4.26 on an i686 machine (5570.56 BogoMips).
Note 96.31% of all statistics are fiction.
next prev parent reply other threads:[~2004-07-07 13:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-01 18:15 Bjorn Helgaas
2004-07-01 18:53 ` Rajesh Shah
2004-07-02 15:51 ` Bjorn Helgaas
2004-07-07 12:31 ` Davide Rossetti
2004-07-07 12:45 ` Helge Hafting
2004-07-07 16:59 ` Roland Dreier
2004-07-08 9:03 ` Helge Hafting
2004-07-07 17:04 ` Zwane Mwaikambo
2004-07-07 13:15 ` Richard B. Johnson [this message]
2004-07-07 17:13 ` Rajesh Shah
2004-07-02 16:04 ` Roland Dreier
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