Messages in this thread |  | | Date | Tue, 9 Oct 2001 16:31:26 +0200 | From | Andrea Arcangeli <> | Subject | Re: pre6 VM issues |
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On Tue, Oct 09, 2001 at 10:44:37AM -0200, Marcelo Tosatti wrote: > > Hi, > > I've been testing pre6 (actually its pre5 a patch which Linus sent me > named "prewith 16GB of RAM (thanks to OSDLabs for that), and I've found > out some problems. First of all, we need to throttle normal allocators > more often and/or update the low memory limits for normal allocators to a > saner value. I already said I think allowing everybody to eat up to > "freepages.min" is too low for a default. > > I've got atomic memory failures with _22GB_ of swap free (32GB total): > > eth0: can't fill rx buffer (force 0)! > > Another issue is the damn fork() special case. Its failing in practice: > > bash: fork: Cannot allocate memory > > Also with _LOTS_ of swap free. (gigs of them) > > Linus, we can introduce a "__GFP_FAIL" flag to be used by _everyone_ which > wants to do higher order allocations as an optimization (eg allocate big > scatter-gather tables or whatever). Or do you prefer to make the fork() > allocation a separate case ? > > I'll take a closer look at the code now and make the throttling/limits to > what I think is saner for a default.
I've also finished last night to fix all highmem troubles that I could reproduce on 128mbyte with highmem emulation, I'm confidetn it will work fine on real highmem too now, I hope to get access soon to some highmem machine too to test it.
I guess you're not interested to test my patches since they're not in the mainline direction though.
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