Hi Tobi, On Mon, Dec 14, 2009 at 6:59 AM, Tobias Oetiker <tobi@xxxxxxxxxx> wrote: > Hi Corrado, > > Dec 3 Corrado Zoccolo wrote: > >> Hi Tobias, >> does the patch in http://lkml.org/lkml/2009/11/30/301 help with your >> high order allocation problems? >> It seems that you have lot of memory, but high order pages do not show up. >> The patch should make them more likely to appear. >> On my machine (that has much less ram than yours), with the patch, I >> always have order-10 pages available. > > I have tried it and ... it does not work, the page allocation > failure still shows. BUT while testing it on two machines I found that it > only shows on on machine. The workload on the two machines is > similar (they both run virtualbox) and also the available memory. Where those both failing before the patch? Did the order of failure change? > Could it be caused by a hardware driver ? It should be something that is taking more time to release pages, but I don't know what can it be. What happens if you drop the caches when you are getting failures? Does the failure rate drops as if you had just rebooted? Can you log at regular intervals the content of /proc/buddyinfo, and try correlating when the number of pages of the requested order are becoming scarce with some other event? Thanks, Corrado > > cheers > tobi > > -- > Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland > http://it.oetiker.ch tobi@xxxxxxxxxx ++41 62 775 9902 / sb: -9900 > -- __________________________________________________________________________ dott. Corrado Zoccolo mailto:czoccolo@xxxxxxxxx PhD - Department of Computer Science - University of Pisa, Italy -------------------------------------------------------------------------- The self-confidence of a warrior is not the self-confidence of the average man. The average man seeks certainty in the eyes of the onlooker and calls that self-confidence. The warrior seeks impeccability in his own eyes and calls that humbleness. Tales of Power - C. Castaneda -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
