linux-kernel - Failing a bio right

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Message-ID: <CAG3n4CS5vyx2sn9t0geQoxa+kE+Nk9Q-0fwTCU6o9iQ33bORjA@mail.gmail.com>
Date:	Thu, 19 Jan 2012 18:04:19 +0200
From:	Tomer Margalit <tomermargalit@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Nezer Zaidenberg <nzaidenberg@....com>,
	tomer Margalit <tomermargalit@...il.com>
Subject: Failing a bio right

Hi All,

I have a make_request function that blocks writes (by using
wait_event_interruptible on some event).
I want the user to be able to stop the function if it takes too long
(that's the reason for the interruptible version).
So when the call is interrupted I call bio_endio with the EINTR error
to signal the interruption.
Usually this works fine, but after a lot of writes, the system says
"lost page write due to I/O error on device".
At this point the process hangs.

Is this the right way to do what I'm trying to do?

Thanks,
   Tomer
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