Dne Čt 12. ledna 2012 22:59:14 Dave Anderson napsal(a): > ----- Original Message ----- > > > Hi all, > > > > it seems crash shows incorrect HighMem stats with recent kernels. > > E.g.: > > > > crash> kmem -i > > [...] > > TOTAL HIGH 1821682 6.9 GB 93% of TOTAL MEM > > > > FREE HIGH 0 0 0% of TOTAL HIGH > > TOTAL LOW 132983 519.5 MB 6% of TOTAL MEM > > > > FREE LOW 1333474 5.1 GB 1002% of TOTAL LOW > > > > BTW note that total low is smaller than free low, which is obviously > > incorrect. I believe that this is somehow related to the Movable zone, > > because the code that counts free low pages checks for pages which > > belong to > > > > ZONE_HIGHMEM, which is initialized as: > > vt->ZONE_HIGHMEM = vt->nr_zones - 1; > > > > My system has 4 zones: > > > > ZONE NAME SIZE MEM_MAP START_PADDR START_MAPNR > > > > 0 DMA 4080 f4a02200 10000 0 > > 1 Normal 221694 f4a22000 1000000 4080 > > 2 HighMem 790002 f50e5fc0 371fe000 225774 > > 3 Movable 0 0 0 0 > > > > And indeed, "help -v" shows: > > [...] > > > > dump_free_pages: dump_free_pages_zones_v2() > > > > [...] > > > > ZONE_HIGHMEM: 3 > > > > I don't know yet how to fix this, but maybe somebody can push me in > > the right > > direction. > > Seems like you're already headed down the right path with the > vt->ZONE_HIGHMEM initialization, at least w/respect to the > FREE HIGH of "0". On the other hand, I'm looking at a recent > x86 kernel with the Movable zone, and it has normal > looking statistics w/respect to total-low/free-low. Interesting. What does "kmem -n" show? How is your ZONE_HIGHMEM reported by "help -v"? Petr Tesarik SUSE Linux -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
