Messages in this thread |  | | Date | Thu, 8 Nov 2001 13:28:44 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: out_of_memory() heuristic broken for different mem configurations (fwd) |
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On Thu, 8 Nov 2001, Rik van Riel wrote:
> On Thu, 8 Nov 2001, Linus Torvalds wrote: > > On Thu, 8 Nov 2001, Marcelo Tosatti wrote: > > > > > > I guess you forgot to apply the following patch on 2.4.15-pre1, right ? > > > > The thing is, I _really_ think it is broken. > > > > The way to make it fail is to have many large SHARED mappings > > ISTR that you wanted swap_out() changed into something which > only scans a portion of the ptes and doesn't have any return > value for a related reason in early 2.4 ... ;)
Rik,
I remember Linus had a reasoning for the "scan _ALL_ ptes until success" behaviour.
Linus, was that due to zone-specific (eg DMA shortage on bigmem machine) shortages or ?
That _is_ one good argument (I'm still seeing the network driver not being able to allocate memory from the DMA zone on the 16GB boxen), I think.
However, the current code breaks badly as I've tested on the 16GB boxen.
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