On Mon, 2010-09-13 at 21:35 +0200, Andi Kleen wrote: > Stephane Eranian <eran...@google.com> writes: > > > The DS, BTS, and PEBS memory regions were allocated using kzalloc(), i.e., > > requesting contiguous physical memory. There is no such restriction on > > DS, PEBS and BTS buffers. Using kzalloc() could lead to error in case > > no contiguous physical memory is available. BTS is requesting 64KB, > > thus it can cause issues. PEBS is currently only requesting one page. > > Both PEBS and BTS are static buffers allocated for each CPU at the > > first user. When the last user exists, the buffers are released. > > DS supports page tables, but I have some doubts it really > supports page faults. vmalloc today does page faults. > > I think the change is a good idea, but it will need vmalloc_sync_all() > everywhere.
Right, I seem to remember from that last discussion on vmalloc vs NMI that vmalloc_sync_all() had some issues, or am I totally mis-remembering that? But yes, a vmalloc_sync_all() after the vmalloc_node() and this should indeed work. ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
