Messages in this thread | | | Date | Tue, 20 May 2008 16:33:16 +0200 | From | Pavel Machek <> | Subject | Re: Deleting large files |
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On Wed 2008-05-07 19:14:33, Morten Welinder wrote: > > Suppose you had an N GB file that just filled up the disk. You now > > delete it, but get control back before it is really deleted. You > > now start to write a new file that will eventually just fill up > > the disk. [...] > > That argument ought to stop right there. If you believe that deleting a > file will necessarily and immediately give you back the space, then you > are wrong in the current state of the affairs already.
Not if you are the only user.
> user experience. Forking a process to do the deletion (a) is pathetic, > (b) is not currently done, and (c) does not work: you cannot get a result > right away, i.e., you lose error handling.
If you fork a kernel thread, you lose error handling, too.
Think -EIO when writing back bitmaps...
(Hmm, you'd have to use O_SYNC to see that, so this is probably minor).
I guess doing freeing asynchronously would be okay in the 'close' case...
Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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