Re: disks stats through /proc

Majdi Abbas (
Fri, 4 Dec 1998 09:57:50 -0500 (EST)

I had fixed up the scsi/ide/4drive limit a while ago, but it was never
included. It was around the IO-APIC introduction time (i.e. more
important things were 'broken') and there were rumblings of a code freeze.


Each one does the same thing, but does it differently (apply *only* one of
these, not both). 'array' hold a resizeable array for each device, and
'direct' creates a large array up-front for performance reasons. I like
'array' and Mark Lord likes 'direct'. It'll need a little fixing up to
get it going on 2.1.130, but it shouldn't be a big deal. It's also
trivial to do this on a partition level - it's just a matter of removing
the switch() statement which intentionally removes the per-partition parts
of a device #.


On Thu, 3 Dec 1998, Tigran Aivazian wrote:

> IMHO, this should be done on a fine-grained (partition level) rather than
> coarse (drive) level. There is enough information in
> ll_rw_blk.c/add_request() to do it now but, of course, kernel_stat
> structure will have to be seriously modified.
> There is something frustrating about the quality and speed of Linux
> development. I.e. the quality is too high and the speed is too high, in
> other words, I can implement this disk stat feature, but I bet someone else
> has already done it and is just about to release his patch to Linus soon...


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