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Date:      Wed, 24 Sep 2008 09:26:26 +0400
From:      Eygene Ryabinkin <rea-fbsd@codelabs.ru>
To:        Maksim Yevmenkin <maksim.yevmenkin@gmail.com>
Cc:        rik@freebsd.org, ed@freebsd.org, current@freebsd.org, bug-followup@freebsd.org
Subject:   Re: kern/127446: [patch] fix race in sys/dev/kbdmux/kbdmux.c
Message-ID:  <mItlx23gME5dTWNFHx5c9hqhvbU@QMPrI3KwV3l7UDOvbWDm263ry5M>
In-Reply-To: <QqKr2VPu8fyQwhEJHQt9Bg/XOKc@K033dsD74Ht1Pqr5uGITGrg6QIg>
References:  <20080917161633.9E2F717101@shadow.codelabs.ru> <bb4a86c70809170956x36234893he8894a49127b6b6e@mail.gmail.com> <gaH7cu1zt0Bw5e8Q2XfgrlKSRyY@iXA9ZWPrtc2I2BMzBXoToMd7YdQ> <bb4a86c70809171052t5e961675n139b2848e6addd0@mail.gmail.com> <OBTLESaczqaewZBU9qdf0FWZRHE@7/OI9n2WwGs0JPogavdPqCpU9P8> <OukumQcOIGlPdbI1QmdweY8cFsk@IW4pzQfcswHj%2B/3imThIGjvxQdw> <bb4a86c70809190920l29f40e3cja19f6795e19b02b@mail.gmail.com> <byCZZ2L%2BP/vIU5hBTMuURReOshU@p9DJkXKp%2Br2jequ3/WCPe%2BJakGc> <XTJ4IILGIQiL7GkTteNpWNqCP5A@puSb6//93PqXpeckgTOA3gBSgL0> <QqKr2VPu8fyQwhEJHQt9Bg/XOKc@K033dsD74Ht1Pqr5uGITGrg6QIg>

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Good day.

Tue, Sep 23, 2008 at 02:02:50PM +0400, Eygene Ryabinkin wrote:
> The attached patch was tested on two 7.1-PRERELEASE systems (i386 and
> amd64, both with and without X), on 7.0-STABLE and 7.0-RELEASE-p3 (i386,
> only console, no X) and on rather old 8-CURRENT from Jul 1, syscons.c
> revision 1.459 (amd64 both with and without X).  Works fine for me.
>=20
> 8.x needs slightly modified patch due to the naming changes.  Also
> attached it.  Will try a fresher -CURRENT in some hours: Ed did massive
> changes due to the MPSAFE tty layer, so may be this patch won't be
> needed for the modern 8-CURRENT.

Tested the patches on the 8-CURRENT from yesterday: system is stable, no
side effects both in console and X.  As the bonus, I had noticed that
the strange keyboard behaviour that I used to see on my laptop is
disappeared.  The effect was the following: after some hours of laptop
inactivity, keyboard input was slow as if a delay of about a second was
introduced between keyboard clicks.  I had this only on console, X
worked fine.  But now, after 12 hours of laptop inactivity, all works
fine, no delays.  May be this is due to the locking changes introduced
by the current patches.
--=20
Eygene
 _                ___       _.--.   #
 \`.|\..----...-'`   `-._.-'_.-'`   #  Remember that it is hard
 /  ' `         ,       __.--'      #  to read the on-line manual  =20
 )/' _/     \   `-_,   /            #  while single-stepping the kernel.
 `-'" `"\_  ,_.-;_.-\_ ',  fsc/as   #
     _.-'_./   {_.'   ; /           #    -- FreeBSD Developers handbook=20
    {_.-``-'         {_/            #

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