From: Ingo Molnar <mingo@elte.hu>
To: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: linux-serial@vger.kernel.org, Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH -rt] serial: 8250: fix shared interrupts issues under RT kernels
Date: Tue, 24 Jun 2008 02:12:21 +0200 [thread overview]
Message-ID: <20080624001221.GA20685@elte.hu> (raw)
In-Reply-To: <20080623232957.GA5111@polina.dev.rtsoft.ru>
* Anton Vorontsov <avorontsov@ru.mvista.com> wrote:
> 8250's initialization routines relies on the fact that _irqsave
> spinlock will disable local hardirqs, so that the driver can issue
> IRQ-triggering operations before registering the port in the IRQ
> chain.
>
> With RT kernels and preemptable hardirqs this isn't true, _irqsave
> spinlock does not disable local hardirqs, and this causes following
> trace:
again, please let the -rt maintainers sort out which patches need to be
propagated to upstream maintainers.
Ingo
next prev parent reply other threads:[~2008-06-24 0:12 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-23 23:29 [PATCH -rt] serial: 8250: fix shared interrupts issues under RT kernels Anton Vorontsov
2008-06-24 0:12 ` Ingo Molnar [this message]
2008-07-01 13:43 ` [PATCH] serial: 8250: fix shared interrupts issues with SMP and " Anton Vorontsov
2008-07-01 13:43 ` Alan Cox
2008-07-01 15:02 ` [PATCH v2] " Anton Vorontsov
2008-07-09 19:29 ` Anton Vorontsov
2008-07-09 19:21 ` Alan Cox
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