From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "George Spelvin" <linux@horizon.com>
Cc: linux-kernel@vger.kernel.org, linux@horizon.com
Subject: Re: [RFC 2/2] serial/8250.c: Use self-adjusting list for port poll order.
Date: Fri, 14 Nov 2008 21:47:11 +0000 [thread overview]
Message-ID: <20081114214711.3c1d1473@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <20081114213449.14960.qmail@science.horizon.com>
> This code does that by using the previous poll cycles as a hint.
> If a port is idle, it will migrate to the end of the list and
> only have to be checked once.
>
> Part 1 changed the list to singly-linked to make the list shuffling easier.
>
> Comments? Please?
Is it really worth the complexity
- PCI ports are shared IRQ always
- Legacy ports are almost never shared IRQ on the LPC bus (and are
increasingly going away)
next prev parent reply other threads:[~2008-11-14 21:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20081113150308.3590.qmail@science.horizon.com>
[not found] ` <20081114053042.11532.qmail@science.horizon.com>
2008-11-14 21:17 ` [RFC 1/2] serial/8250.c: Change to singly linked handler chain George Spelvin
[not found] ` <20081114053314.12093.qmail@science.horizon.com>
2008-11-14 21:34 ` [RFC 2/2] serial/8250.c: Use self-adjusting list for port poll order George Spelvin
2008-11-14 21:47 ` Alan Cox [this message]
2008-11-15 0:10 ` Theodore Tso
2008-11-16 15:23 ` George Spelvin
2008-11-16 15:51 ` Alan Cox
2008-11-16 16:57 ` George Spelvin
2008-11-16 16:23 ` Theodore Tso
2008-11-16 18:02 ` George Spelvin
2008-11-16 16:49 ` Theodore Tso
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