(2012/06/14 10:12), Minchan Kim wrote: > d179e84ba fixed the problem[1] in vmscan.c but same problem is here. > Let's fix it. > > [1] http://comments.gmane.org/gmane.linux.kernel.mm/65844 > > I copy and paste d179e84ba's contents for description. > > "It is unsafe to run page_count during the physical pfn scan because > compound_head could trip on a dangling pointer when reading > page->first_page if the compound page is being freed by another CPU." > > * changelog from v1 > - Add comment about skip tail page of THP - Andrea > - fix typo - Wanpeng Li > - based on next-20120613 > > Cc: Andrea Arcangeli<aarcange@xxxxxxxxxx> > Cc: Mel Gorman<mgorman@xxxxxxx> > Cc: Michal Hocko<mhocko@xxxxxxx> > Cc: KAMEZAWA Hiroyuki<kamezawa.hiroyu@xxxxxxxxxxxxxx> > Cc: Wanpeng Li<liwp.linux@xxxxxxxxx> > Signed-off-by: Minchan Kim<minchan@xxxxxxxxxx> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>