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Date: Wed, 16 Apr 2008 01:29:21 +0800 From: "rae l" <crquan@...il.com> To: "Jeff Moyer" <jmoyer@...hat.com> Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: iowait stability regressed from kernel 2.6.22 under heavy load of multi-thread aio writing/reading On Tue, Apr 15, 2008 at 9:37 PM, Jeff Moyer <jmoyer@...hat.com> wrote: > > "rae l" <crquan@...il.com> writes: [...] > > Why doesn't bisecting work? Can you provide your test code so others > can verify your findings? just small C programs that use multi pthread aio_write, will be pasted soon, > > > by the way, a question is how to guarantee a kernel not regress under > > heavy multi-thread aio writing load? ltp project seems not give the > > answer: > > Well, providing your test code would be a step closer to achieving this > guarantee. If it is scriptable, then there is a chance we could > integrate it into the aio-dio regression test suite: > > http://git.kernel.org/?p=linux/kernel/git/zab/aio-dio-regress.git;a=summary this aio-dio-regress.git seems to use linux native aio system-call interface(shipped with libaio) only? but the POSIX aio (shipped with librt) implemented with pthread and pwrite system-call tests can also be added, the librt is the most cases when refered to aio. However, the test code will come soon. -- Denis -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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