[PATCH 3/3] Quick vmalloc vs kmalloc fix to the case where array size is too large
dave at linux.vnet.ibm.com
Tue Jul 14 10:47:32 PDT 2009
On Tue, 2009-07-14 at 10:28 -0700, Paul Menage wrote:
> On Mon, Jul 13, 2009 at 9:25 PM, KAMEZAWA
> Hiroyuki<kamezawa.hiroyu at jp.fujitsu.com> wrote:
> > My point is
> > - More PIDs, More time necessary to read procs file.
> Right now, many pids => impossible to read procs file due to kmalloc
> failure. (This was always the case with cpusets too). So using kmalloc
> in those cases is a strict improvement.
How big were those allocations that were failing? The code made it
appear that order-2 (PAGE_SIZE*4) allocations were failing. That's a
bit lower than I'd expect the page allocator to start failing.
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