Re: Disk Performance Measurements

• Next message: Anton Blanchard: "Re: isa_read/write not available on ppc - solution suggestions ??"
• Previous message: Alan Cox: "Re: T/TCP"
• In reply to: Shaun: "Re: Disk Performance Measurements"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

On Thu, May 03 2001, Shaun wrote:
> Again, this isn't the case in the 2.2.16 kernel I'm working with. Each
> call to make_request() causes pgin/pgout to be incremented, since these
> requests can be of different sizes (even for the same disk) I can't see
> how a kb value can be deduced.

Check if the latest 2.2 is correct then, 2.4 is.

> Just as a question though, a disk/partition doesn't need to have a
> filesystem on it, so why is the "correct_size" for a buffer request on the
> block device defined based on a filesystem block system?

It's not, but the fs may set the block size (ext2 does).

-- 
Jens Axboe
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

• Next message: Anton Blanchard: "Re: isa_read/write not available on ppc - solution suggestions ??"
• Previous message: Alan Cox: "Re: T/TCP"
• In reply to: Shaun: "Re: Disk Performance Measurements"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Mon May 07 2001 - 21:00:16 EST