From owner-FreeBSD-tech-jp@jp.freebsd.org  Wed Sep 24 10:09:08 1997
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To: FreeBSD-tech-jp@jp.freebsd.org
From: KATO Takenori <kato@ganko.eps.nagoya-u.ac.jp>
In-Reply-To: Your message of "Wed, 24 Sep 1997 09:48:11 +0900"
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Date: Wed, 24 Sep 1997 10:09:06 +0900
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Subject: [FreeBSD-tech-jp 634] Re: panic when I use vn driver on RELENG_2_2
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$B2CF#!wL>Bg4d9[$G$9!%(B


> VOP_READ/WRITE$B$O!$8F$S=P$9A0$K(Bvnode$B$r(Block$B$7$F!$(BVOP_READ/WRITE$B$+$i5"$k(B
> $B$H$-$b(Block$B$7$?$^$^$K$J$k$h$&$K$J$C$F$$$^$9!%$H$$$&$3$H$O!$(B
> VOP_READ/WRITE$B$N@h$K!$(Bvnode$B$,$9$G$K(Block$B$5$l$F$$$k$3$H$rK:$l$F$b$&0lEY(B
> lock$B$9$k$h$&$J%3!<%I$,F~$C$F$$$k$3$H$rI=$7$F$$$^$9!%(B

$B13$G$9!%$4$a$s$J$5$$!%$N$/$S$5$s$N(Bkgdb$B$N%m%0$r8+$k$H!$(B

	vnstrategy() --> ufs_lock --> panic

$B$H$J$C$F$$$k$N$G!$(BVOP_READ/WRITE$B$NA0$N(Bvn_lock$B$GFs=E%m%C%/$,H/@8$7$F$$(B
$B$^$9!%$@$+$i!$!VC/$+$,%m%C%/$r$O$:$7K:$l$F$$$k!W$N$@$H;W$$$^$9!%(B

$B$b$7!$!V%m%C%/$r$O$:$7K:$l$F$$$k!W$H$$$&>uBV$r2sHr$G$-$J$$!$$9$J$o$A!$(B
$B$3$l$rHr$1$h$&$H$9$k$H(Bvn$B%I%i%$%P0J30$N$H$3$m$G(Blocking violation$B$r$*$3(B
$B$9$h$&$G$"$l$P!$(Bvn$B%I%i%$%P$N$[$&$G$$$A$$$A(BVOP_ISLOCKED$B$r8F$S=P$7$F8!::(B
$B$9$kI,MW$,$"$j$^$9(B($B$9$4$/7y(B)$B!%(B

$B$+$J$jA0$+$i(Bvn$B%I%i%$%P$G$O(BVOP_READ/WRITE/BMAP$B$NA0$K$O(Block$B$7$F$$$J$+$C(B
$B$?$N$@$+$i$O$:$7$F$7$^$($H$$$&$N$,$"$j$^$9!%$7$+$7!$(Bnullfs$B$d(Bunionfs$B$O!$(B
$B>e0LAX$,(Bvnode$B$N(Block/unlock$B$N5,Ls$r873J$K<i$C$F$$$k$3$H$rA0Ds$K$7$F$$$k(B
$B$N$G!$(Bvnodefs$B$r(Bnull mount$B$d(Bunion mount$B$9$k$H$:$C$3$1$^$9!%(B

$B$d$C$Q$j!$C/$+$,(Bvnode$B$N<BAu$rE0DlE*$K8+D>$7$F$/$l$J$$$H%@%a$G$9$M!%(B

----
KATO Takenori <kato@ganko.eps.nagoya-u.ac.jp>
Dept. Earth Planet. Sci., Nagoya Univ.,  Nagoya, 464-01, Japan
PGP public key: finger kato@eclogite.eps.nagoya-u.ac.jp
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