Messages in this thread |  | | Date | Sat, 29 Sep 2001 12:21:07 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: 2.4.10 VM, active cache pages, and OOM |
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On Sat, 29 Sep 2001, Rik van Riel wrote: > On Sat, 29 Sep 2001, Linus Torvalds wrote: > > > (which basically says: we only mark the page accessed if we read the > > _beginning_ of the page, or if we just did a seek to it) > > That should work for linear IO, but I fear what influence > such a thing would have on eg. database indexes ;)
Well, for things that seek, the behaviour will be the same as it was before: it will always mark the page accessed, because "file->f_reada" will always be zero for the first read after a lseek.
That's why we have the "or if we just did a seek to it". You cannot _just_ test for "did we read the beginning of a page", because that fails for seekers, whether database or otherwise.
Linus
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