[PATCH 3/3] Quick vmalloc vs kmalloc fix to the case where array size is too large

Paul Menage menage at google.com
Mon Jul 13 21:04:32 PDT 2009

On Mon, Jul 13, 2009 at 8:53 PM, KAMEZAWA
Hiroyuki<kamezawa.hiroyu at jp.fujitsu.com> wrote:
> Hmm, ok...then, if too much pids, you hit vmalloc()/vfree() problem again.
> So, it's not good idea to use vmalloc/vfree here after all.

Agreed, using vmalloc()/vfree() isn't a perfect solution, but at least
the approach of kmalloc() for small allocations and vmalloc() for
larger allocations solves the current problem (reading tasks/procs
files can fail due to lack of contiguous kmalloc memory) without
introducing overhead in the typical case.


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