linux-kernel - Re: [PATCH 04/11] Blackfin SPORT UART: fix overrun errors

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Message-ID: <20090603095346.64c874b1@lxorguk.ukuu.org.uk>
Date:	Wed, 3 Jun 2009 09:53:46 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Mike Frysinger <vapier.adi@...il.com>
Cc:	Mike Frysinger <vapier@...too.org>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	uclinux-dist-devel@...ckfin.uclinux.org,
	Cliff Cai <cliff.cai@...log.com>,
	Bryan Wu <cooloney@...nel.org>
Subject: Re: [PATCH 04/11] Blackfin SPORT UART: fix overrun errors

> > This should have no effect on a modern kernel.
> 
> well, we wouldnt be making changes if we werent seeing data overruns today

If it has an effect then something else is going on.
> 
> > There is 64K of queueing between you and the ldisc nowdays.
> 
> i dont think that really matters ... we do too much work in the
> interrupt and so we miss new data

Which the other patches addressed so my guess is the real fixes were the
other changes.

Alan
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