Messages in this thread | | | Date | Wed, 13 Jan 1999 15:59:49 +0100 (CET) | From | Rik van Riel <> | Subject | Re: MM deadlock [was: Re: arca-vm-8...] |
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On Wed, 13 Jan 1999, Andrea Arcangeli wrote: > On Tue, 12 Jan 1999, Rik van Riel wrote: > > > IIRC this facility was in the original swapin readahead > > implementation. That only leaves the question who removed > > it and why :)) > > There's another thing I completly disagree and that I just removed here. > It's the alignment of the offset field. I see no one point in going back > instead of only doing real read_ahead_. > > Maybe I am missing something?
Yes, you are:
- aligned reads make sure you don't do smallish readaheads of only 1 block (because you've already got the rest) - there are programs that move through the data backwards or tilewise - in allocating swap space it just doesn't make sense to read into the next swap 'region'
Rik -- If a Microsoft product fails, who do you sue? +-------------------------------------------------------------------+ | Linux memory management tour guide. riel@nl.linux.org | | Scouting Vries cubscout leader. http://www.nl.linux.org/~riel | +-------------------------------------------------------------------+
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