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Re: Raw I/O enhancements for 2.3.99.pre9-2 kernels.

To: "Matt D. Robinson" <yakker@xxxxxxxxxxxxxx>
Subject: Re: Raw I/O enhancements for 2.3.99.pre9-2 kernels.
From: Chaitanya Tumuluri <chait@xxxxxxxxxxxxxxxxxxxx>
Date: Fri, 26 May 2000 18:34:55 -0700
Cc: rawio@xxxxxxxxxxx
In-reply-to: Your message of "Fri, 26 May 2000 17:42:37 PDT." <Pine.LNX.4.21.0005261742140.26200-100000@xxxxxxxxxxxxxxxxxxx>
Sender: owner-rawio@xxxxxxxxxxx
Hey Matt! What kind of problems and which kernel are you talking
about? D'ju have any particular testcase I could use?

-Chait.

On Fri, 26 May 2000 17:42:37 PDT, "Matt D. Robinson" <yakker@xxxxxxxxxxxxxx> 
wrote:
>Hey, Chait!  Have you fully tested map_kernel_kiobuf() yet?  I've 
>had a few problems with it ...
>
>--Matt
>
>On Fri, 26 May 2000, Chaitanya Tumuluri wrote:
>|>Hi,
>|>
>|>This email is to announce the availability of kiobuf-based I/O
>|>functionality for 2.3.99.pre9-2 kernels.
>|>
>|>First, the I/O queuing and scsi midlayer code in the Linux 
>|>2.3.99.pre9-2 kernel has been enhanced to handle kiobuf-based 
>|>I/O requests. Second, Stephen Tweedie's rawio codepath has been 
>|>extended to use this enhancement to directly issue kiobuf-based 
>|>requests without having to restuff them into buffer-heads. 
>|>
>|>This change does not change the device access semantics of Stephen 
>|>Tweedie's code for raw devices. This enhancement only works for scsi 
>|>disks currently.
>|>
>|>The complete patch (combining Stephen Tweedie's current patchset 
>|>for Raw I/O and the new queueing/scsi-midlayer enhancements) is
>|>available from:
>|>
>|>     http://oss.sgi.com/projects/rawio
>|>
>|>Thanks,
>|>-Chait.


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