Messages in this thread | | | Date | Wed, 20 Jan 1999 01:38:13 +0100 (CET) | From | Andrea Arcangeli <> | Subject | Re: swapout and pte_young() PG_referenced |
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On Tue, 19 Jan 1999, Stephen C. Tweedie wrote:
> > But I can't see how can be useful marking the page PG_referenced before > > return 0 if the page is young. It's not a swap cache page, it's not a > > freeable page and shrink_mmap() can do nothing with it. > > > Am I missing something again ? ;) > > Yes. We might well have released the page before shrink_mmap() next > comes around to it. Think about a binary which exits and is respawned. > We want any usage information (the PG_referenced bit) to survive the > exit() so that it is not immediately evicted from cache once the process > exits and shrink_mmap starts taking an interest in it.
Ah cool! Thanks. I didn't though at it.
Andrea Arcangeli
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