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Re: kern/45441: aio_write and aio_read connected to one pipe don't make progress
The following reply was made to PR kern/45441; it has been noted by GNATS.
From: Alexander Nasonov <alnsn%yandex.ru@localhost>
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
Subject: Re: kern/45441: aio_write and aio_read connected to one pipe don't
Date: Thu, 13 Oct 2011 22:44:43 +0100
David Laight wrote:
> On Wed, Oct 12, 2011 at 09:26:40PM +0100, Alexander Nasonov wrote:
> > The best fix, I think, is return ESPIPE for non-seekable fildes rather
> > than silently ignoring aio_offset. This would indirectly solve the issue
> > described in this PR.
> IIRC that breaks historic practise.
Do you have any reference or any more details on this?
> The likely fubar here is that 'aio' is synchronous on a single kernel
Yes, I know. I wrote the test to prove that the current implementation
Having separate writer and reader kernel threads would solve the
problem but it's quite a lot of work.
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