lkml.org 
[lkml]   [1998]   [Dec]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: atomicity
Date
alan@lxorguk.ukuu.org.uk (Alan Cox) writes:
> >
> > not useful anymore. With modern disks, chances are excellent that the
> > specific 3D geometry the file system sees is an utter fiction, and
> > that cylinder locality is thus more-or-less a meaningless concept.
>
> If it was meaningless then things like sorting write queues would also
> be pointless. Its certainly true that the 3D information is less than
> useful nowdays. Its not however true that relative distance (in time)
> between sectors is not strongly proportional to the difference in sector
> numbers, or that reading sectors is order of sequentional logical number
> isnt a good thing

Aha! I think I get it.

Even though cyl groups are a fiction, they're no worse than any other
arbitrary grouping of sectors, so why not use them and let the disk
controller hardware do the maths instead of the kernel. Clever.

--
Mirian Crzig Lennox Systems Anarchist
"There's a New World Order coming every minute.
Make mine extra cheese."

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

\
 
 \ /
  Last update: 2005-03-22 13:45    [W:0.130 / U:0.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site