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Date:      Wed, 25 Apr 2012 00:36:58 +0400
From:      Slawa Olhovchenkov <slw@zxy.spb.ru>
To:        "K. Macy" <kmacy@freebsd.org>
Cc:        freebsd-performance@freebsd.org, freebsd-current@freebsd.org
Subject:   Re: pmap and mtx scalability problem
Message-ID:  <20120424203658.GR32749@zxy.spb.ru>
In-Reply-To: <CAHM0Q_PEe18-4yfrHPujUWxsvWTUuP2-0QvJtWOh2f=igjqh=A@mail.gmail.com>
References:  <20120424191415.GE76983@zxy.spb.ru> <CAHM0Q_PEe18-4yfrHPujUWxsvWTUuP2-0QvJtWOh2f=igjqh=A@mail.gmail.com>

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On Tue, Apr 24, 2012 at 09:27:30PM +0200, K. Macy wrote:

> Known problem. There is an open disagreement about how to improve the
> granularity of locking in pmap.

split locking to process-specific information and global information?
use lock-free lists (i see TAILQ_INSERT_TAIL in pmap_enter)?

sorry for stupidity, if any.



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