lkml.org 
[lkml]   [1999]   [Jun]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [patch] pagecache-2.3.9-H3, bmap & ext2fs cleanup patch
Date
From
Linus Torvalds wrote:
>
>
> On Sat, 26 Jun 1999, Ingo Molnar wrote:
> >
> > oh, i see. (i was used to setting this in the fs, this is why i missed it)
> > I think encoding holes in this way is bad, it will prevent legitimate uses
> > of the very same bit-combination: (!Mapped && Uptodate) will be useful if
> > we'll ever do 'delayed allocation' of filesystem blocks, it will represent
> > pretty ordinary blocks which are not yet mapped to the filesystem.
>
> Give me one valid reason to ever do that, please..

XFS?

A high-performance FS might want to postpone allocating file blocks
until it knows the filesize. Sure, it will have to start allocating
anyway if the file grows above a certain size, but by that time you
at least know it's not going to stay a small file.

Roger.

--
** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 **
*-- BitWizard writes Linux device drivers for any device you may have! --*
------ Microsoft SELLS you Windows, Linux GIVES you the whole house ------


-
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 13:52    [W:0.807 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site