From: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>
To: user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] [PATCH v2] EPOLL Interrupt Controller V2.0
Date: Wed, 11 Nov 2015 23:25:54 +0000 [thread overview]
Message-ID: <5643CE82.6030302@kot-begemot.co.uk> (raw)
In-Reply-To: <f92188ee79c1a708a84a9bc64f8a5f02@nixia.no>
There is for some reason IRQ/sigio handler reentrancy.
Both the debug "by hand" I stuck into irq.c and Thomas traces confirm it.
I have no clue how this is possible as the code in signal.c should guard
against that.
I will sleep on it and try to tackle this tomorrow - no idea what is
going on, but this is what is happening here.
A.
On 11/11/15 21:49, stian@nixia.no wrote:
>> I will probably add some "manual" debug code to check if the nested
>> invocation happens with the debug options off.
> Might be timing dependent and/or issue with nested blocking/unblocking
> of signals.
> Or debug printing when it should not.
>
> Just my two cents
>
> Stian Skjelstad
>
>
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next prev parent reply other threads:[~2015-11-11 23:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-09 14:33 [uml-devel] [PATCH v2] EPOLL Interrupt Controller V2.0 Anton Ivanov
2015-11-09 15:03 ` Anton Ivanov
2015-11-10 18:42 ` Anton Ivanov
2015-11-10 20:24 ` Richard Weinberger
2015-11-11 20:46 ` Thomas Meyer
2015-11-11 21:05 ` Richard Weinberger
2015-11-11 21:39 ` Anton Ivanov
2015-11-11 21:49 ` stian
2015-11-11 23:25 ` Anton Ivanov [this message]
2015-11-12 12:29 ` Anton Ivanov
2015-11-12 15:23 ` Anton Ivanov
2015-11-12 16:03 ` Anton Ivanov
2015-11-16 8:09 ` Anton Ivanov
2015-11-18 8:33 ` Anton Ivanov
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