On Thu, Aug 09, 2001 at 03:32:44PM +0200, Bjorn Wesen wrote:
> I'm trying to track down a problem which seems to be a race condition
> vmalloc page table delayed PTE copying", or "you must never
> call free_kiovec in an interrupt context" etc..)
The latter is certainly the case. The former could be the case, however
if you know you're running any free_kiovec from irqs remove it and try
again first.
BTW, you should also avoid all the kiobuf allocation in all the fast
paths, try to pre-allocate it in a slow path to deliver higher
performance. (shortly we'll split the bh/blocks array out of the kiobuf
in a data structure called kiobuf_io so the non-IO usage will avoid the
overhead of the bh/blocks arrays and it will become lighter but still
it won't be that light)
Andrea
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This archive was generated by hypermail 2b29 : Wed Aug 15 2001 - 21:00:26 EST