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From: SODA Noriyuki <soda@sra.co.jp>
To: FreeBSD-users-jp@jp.FreeBSD.org
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Date: Mon, 27 Jun 2005 01:47:13 +0900
X-Sequence: FreeBSD-users-jp 85586
Subject: [FreeBSD-users-jp 85586] Re: Linux
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Sender: owner-FreeBSD-users-jp@jp.FreeBSD.org
X-Originator: soda@sra.co.jp
X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+050320

> $B>/$J$/$H$b$3$3$GOCBj$K$J$C$F$$$k(B physio(9) $B7PM3$G$N(B ATA write $B$O!"(B
	:
> $B$N(B 2) $B$H(B 3) $B$N4V$KEv$?$k(B
> 
> 2.5) OS $B$,(B HDD $B$N(B write cache $B>e$K%G!<%?$,E>Aw$5$l$?$N$r(B($B%G%P%$%9$+$i(B
>      $B$N3d9~$_$K$h$j(B)$B3NG'$9$k(B
>      (write cache $B$J$7$J$iI,$:!"$"$j$@$H1?$,$h$1$l$P(B platter $B$K=q$+$l(B
>      $B$F$$$k(B)
>
> $B$N$h$&$G$9!#(B

$B$H$$$&$+!"$3$l$O(B FreeBSD $B$KFCM-$N=hM}$G$O$J$/$F!"(BLinux $B$G$bF1$8$3$H$r(B
$B$7$F$$$kH&$G$9!#(B[FreeBSD-users-jp 85540] $B$G=q$$$?(B Linux $B$K$*$1$k(B 
dio_await_completion() $B$,!"(BFreeBSD $B$N(B bwait() $B$KAjEv$9$k$N$G$O!)(B

$B$3$N$h$&$JBT$A9g$o$;$r9T$J$o$J$$$H!"(B[FreeBSD-users-jp 85540] $B$NA0H>$G(B
$B=q$$$?$h$&$JLdBj$,@8$8$F$7$^$$$^$9$+$i!"(Braw $B%G%P%$%9(B I/O $B$d(B O_DIRECT 
$B$G$O!"I,$:$3$&$$$&(B DMA $B40N;$NBT$A9g$o$;$r9T$J$&H&$G$9!#(B

> $B$A$J$_$K!"$3$l$r(B 3) $B$K$9$k$K$O!"(Bloader(8) $B$G(B hw.ata.wc $B$r(B 0 $B$K$9$l$P(B
> $B$h$$$h$&$G$9(B(-current $B$G3NG'(B)$B!#$3$N>l9g!"5/F0;~$K(B SET FEATURES $B$r3F(B
> $B%G%P%$%9$KH/9T$7!"(Bwrite cache $B$r;&$7$F$/$l$^$9!#(B

$B$3$N(B hw.ata.wc $B$,%G%U%)%k%H$G(B 1 $B$@$H$$$&7o!"$+$J$j@N$KK\2H$NJ}$G5DO@$K(B
$B$J$j$^$;$s$G$7$?$C$1!#(Bmetadata sync $B$d(B softdep $B$NA[Dj$7$F$$$k@)Ls$r$-(B
$B$A$s$H<i$k$?$a$K$O(B 0 $B$K$9$Y$-$@$1$I!"(B0 $B$K$7$F;n$7$F$_$?$iL@$i$+$KCY$$(B
$B$N$GD|$a$?$_$?$$$J!D(B
-- 
soda
