Messages in this thread |  | | Date | Thu, 8 Feb 2001 11:45:34 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait |
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On Thu, 8 Feb 2001, Marcelo Tosatti wrote:
> > On Thu, 8 Feb 2001, Ben LaHaise wrote: > > <snip> > > > > (besides, latency would suck. I bet you're better off waiting for the > > > requests if they are all used up. It takes too long to get deep into the > > > kernel from user space, and you cannot use the exclusive waiters with its > > > anti-herd behaviour etc). > > > > Ah, but no. In fact for some things, the wait queue extensions I'm using > > will be more efficient as things like test_and_set_bit for obtaining a > > lock gets executed without waking up a task. > > The latency argument is somewhat bogus because there is no problem to > check the request queue, in the aio syscalls, and simply fail if its full.
Ugh, I forgot to say check the request queue before doing any filesystem work.
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