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Re: back-bdb deadlocks
Date: Fri, 18 Jan 2002 07:54:24 -0800
From: "Kurt D. Zeilenga" <Kurt@OpenLDAP.org>
>Must have something to do with thread scheduling
>algorithms... With usermode threads you also need aio support, otherwise
>any blocking I/O blocks all threads, making you effectively
Not when using FreeBSD pthreads... the library properly transfers
control to another thread if the I/O operation would block.
(Of course, if the kernel blocks where it shouldn't then the
process will block, but as far as I can tell.)
Unless FreeBSD pthreads use a non-standard Unix API, there's no way to
avoid blocking on disk i/o. The standard user-mode thread packages
all block on disk i/o, as there's no portable way to avoid it.