Messages in this thread | | | Date | Thu, 28 Aug 2003 06:36:12 +0530 (IST) | From | Nagendra Singh Tomar <> | Subject | Re: Lockless file reading |
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On Thu, 28 Aug 2003, Jamie Lokier wrote:
> Nagendra Singh Tomar wrote: > > While the write had "12" in its buffers and it would have grabbed the > > > page lock to write it into the page cache, won't it set some flag > saying > > that I don't want to be prempted now. I think there is a small > primitive > > for it in from 2.5 onwards. I don't think it will be a good idea to > prempt > > while it is holding the page lock. How is it possible that it just > wrote > > "1" and did not write "2" though it had grabbed the page lock for that > > > purpose. > > Nope. I don't see any disabling of preemption while the page is held. > > It wouldn't make sense anyway, because the copies to/from userspace > can sleep, so there's nothing to gain by disabling preemption.
I understand what you say. Thanx.
> > -- Jamie >
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