Messages in this thread | | | Date | Fri, 5 Jun 2009 09:30:18 +0200 | From | Harald Welte <> | Subject | Re: Linux 2.6.30-rc8 [also: VIA Support] |
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On Thu, Jun 04, 2009 at 10:16:35PM +0200, Andi Kleen wrote: > Harald Welte <HaraldWelte@viatech.com> writes: > > > > why would it matter on UP? as indicated, I'm not the expert here, but I thought > > memory ordering issues only arise in SMP systems [or possibly with regard to > > DMA, but as we already explored much earlier in this thread, drivers that access > > DMA buffers whil the hardware owns them are buggy and need to be fixed] > > Sorry we didn't establish that. Accessing data structures that are > also accessed by DMA hardware is pretty common in fact and memory > ordering issues also come up regularly (e.g. all the infamous PCI > posting bugs) > > What we established is that the drivers don't use LOCK for it > (or at least we think that's very unlikely)
Yes, sorry for not mentioning that. I was implicitly thinking of "not using an appropriate locking method"
-- - Harald Welte <HaraldWelte@viatech.com> http://linux.via.com.tw/ ============================================================================ VIA Free and Open Source Software Liaison
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