On Thu, 2010-09-09 at 23:41 +0200, Stephane Eranian wrote: > > alloc_percpu() is zalloc_percpu() in fact, memory is already cleared. > > > I remember thinking about this and trying to trace to the code down > to figure this out. But it is rather complicated. If alloc_percpu() always > clears the memory, then I think that calling is zalloc_percpu() > would be more helpful....
pcpu_populate_chunk() in mm/percpu-vm.c does indeed do that memset, the one in mm/percpu-km.c does not. It is not obviously clear to me the -km allocator does indeed result in zero filled memory. Tejun? ------------------------------------------------------------------------------ Automate Storage Tiering Simply Optimize IT performance and efficiency through flexible, powerful, automated storage tiering capabilities. View this brief to learn how you can reduce costs and improve performance. http://p.sf.net/sfu/dell-sfdev2dev _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
