linux-kernel - Re: Two other ways to do latched seqcounts

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Message-ID: <20150413092605.2469.qmail@ns.horizon.com>
Date:	13 Apr 2015 05:26:05 -0400
From:	"George Spelvin" <linux@...izon.com>
To:	linux@...izon.com, peterz@...radead.org
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Two other ways to do latched seqcounts

> I'm assuming you're writing to me because of the latched rb-tree;
> because that's the most recent related thing I posted ;-)

Basically yes, although it was the documentation you added to the
latched seqlock code in particular.

I haven't checked the users of your rb-tree code to see how large and
frequently read the trees are, but if a read is expensive, then avoiding
retries by incrementing the seqlock twice per update starts to become
interesting.
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