From: Tom Brown <sa212+emis@cyconix.com>
To: LKML <linux-kernel@vger.kernel.org>
Subject: Canonical ring-buffer code : SMP, single-reader/writer
Date: Sun, 17 Oct 2010 22:50:19 +0100 [thread overview]
Message-ID: <4CBB6F9B.6080803@cyconix.com> (raw)
Does anyone happen to know of any good example code that I could use in
a driver for a simple single-reader, single-writer, ring buffer, on an
SMP system?
My own code doesn't use any locks, but I'm concerned that it may be
flaky. It's running on an 8-core processor, and I'm worried that I may
be seeing SMP locking issues which I don't understand because the driver
is on one core, while the user is on another core.
In my case, the producer is the driver, and the consumer is the user. I
could just lock all the driver writes to the buffer and the driver's
update of the shared 'last written' pointer, but that seems a really
poor design.
Thanks -
Tom
reply other threads:[~2010-10-17 21:50 UTC|newest]
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