* [uml-devel] Deadlock in ubd-aio
@ 2005-05-12 15:00 Bodo Stroesser
0 siblings, 0 replies; only message in thread
From: Bodo Stroesser @ 2005-05-12 15:00 UTC (permalink / raw)
To: Jeff Dike; +Cc: user-mode-linux devel
Hi Jeff,
there is a problem in ubd / aio on host 2.4, that I can
reproduce easily.
I inserted some counters into submit_aio(), not_aio_thread()
and ubd_intr(). If the problem occurs, both
submit_aio_24() and not_aio_thread() are waiting for a write to
pipe to complete, while both pipes are filled with 57 entries each.
Since SIGIO is blocked at that time, ubd_intr() isn't started,
and the system hangs.
I think, we have to add some "flowcontrol", but have no idea how
to do this.
I don't know, if this could be problem on 2.6 host also.
Bodo
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2005-05-12 15:00 [uml-devel] Deadlock in ubd-aio Bodo Stroesser
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