Messages in this thread | | | Subject | Re: [patch] pagecache-2.3.9-H3, bmap & ext2fs cleanup patch | Date | Mon, 28 Jun 1999 08:57:05 +0200 (MEST) | From | (Rogier Wolff) |
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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 ------
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