From owner-FreeBSD-tech-jp@jp.freebsd.org  Wed Oct  1 14:15:50 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, 01 Oct 1997 13:35:47 +0900"
References: <199710010435.NAA02542@sras63.sra.co.jp>
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Date: Wed, 01 Oct 1997 14:15:16 +0900
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Subject: [FreeBSD-tech-jp 681] Re: panic when I use vn driver on RELENG_2_2
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$B2CF#!wL>Bg4d9[$G$9!%(B

>   DELWRI $B$rN)$F$k$N$O(B vfs_bio.c::bdwrite() $B$K8B$i$l$k$h$&$J5$$,$7$^$9!#(B
> $B$A$g$C$HC5$7$F$_$^$7$?$,!"(Bcluster_write() $B$NCf$G(B DELWRI $B$rN)$F$F$$$k>l(B
> $B=j$O8+IU$1$i$l$^$;$s$G$7$?!#(B(RELENG_2_2 $B$G$9(B)
> 
>   bdwrite() $B$O(B cluster_write() $B$K$+$.$i$:!"(Bffs_alloc.c $B$d(B ffs_balloc.c$B!"(B
> ufs_readwrite.c $B$J$I!"(BFFS $B$N$$$?$k=j$+$i8F$P$l$F$$$^$;$s$+(B?

$B$=$NDL$j$G$7$?!%D4$Y$?$H$-$K$O!$G>$_$=$,$^$@?2$F$$$?$h$&$G$9!%(B


>   $B;?@.$G$9!#$?$H$($P!"(Bbdwrite() $B$G$O%P%C%U%!$K(B B_TAPE $B%U%i%0$,N)$C$F$$(B
> $B$k>l9g$O!"(Bbawrite() $B$r8F$S=P$7$F$^$9$+$i!"$=$l$H;w$?$h$&$J2rK!$b9M$($i(B
> $B$l$^$9!#(B

B_TAPE$B$r$d$a$F!$(B

	if (bdevsw[major(bp->b_dev)]->d_flags & D_NODELWRI) {
		bawrite(bp);
		return;
	}

$B$H$7!$(Bst$B$J$I$N%F!<%W%G%P%$%9%I%i%$%P$J$G$N(Bblock device switch table$B$N(B
d_flags$B$K(BD_NODELWRI$B$rDI2C$9$k$H$$$&$N$b9M$($i$l$^$9!%$G$b!$$^$@$3$l$K(B
$BAv$k$N$OAa$$$H;W$$$^$9!%(B


$B$"$H!$:,K\E*$J2r7h$K6a$$$H;W$C$F$$$k$N$,!$(B

  VOP_READ/WRITE$B$r;H$o$:$K!$(BVOP_BMAP/VOP_STRATEGY$B$KCV$-49$($k!%(B

$B$G$9!%$?$@!$$J$<!$(BB_PAGING$B$N;~$K(BVOP_READ/WRITE$B$r;H$&I,MW$,$"$k$N$+M}2r(B
$B$7$F$$$^$;$s!%(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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