Date: Thu, 24 May 2001 01:01:53 +0200 From: Stefan `Sec` Zehl <sec@42.org> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: freebsd-bugs@FreeBSD.ORG Subject: Re: kern/27259: md causes hang with make world Message-ID: <20010524010153.D20596@matrix.42.org> In-Reply-To: <53414.990658066@critter>; from phk@critter.freebsd.dk on Thu, May 24, 2001 at 12:47:46AM %2B0200 References: <20010524004434.C20596@matrix.42.org> <53414.990658066@critter>
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Re,
On Thu, May 24, 2001 at 12:47:46AM +0200, Poul-Henning Kamp wrote:
> In message <20010524004434.C20596@matrix.42.org>, Stefan `Sec` Zehl writes:
> >Is this right? If so, is there a way to increase that significantly, or
> >is this an inherent limitation of the FreeBSD kernel?
>
> Yes. I belive you can raise it, but the wisdom of doing so is in
> doubt as a lot of other kernel dimensions will change too.
Thanks. Then I won't be able to run make world any faster by moving
/usr/obj into a ramdisk, but I can live with that.
I have added a small patch for the md.4 manpage below so other users are
forewarned. If you agree with it, I hope you can commit it. Or should I
open a new PR for it?
Thanks,
Sec
--
Hiroshima '45 Tsjernobyl '86 Windows '95
--- /usr/export/src/share/man/man4/md.4 Sun Dec 31 03:11:56 2000
+++ md.4 Thu May 24 00:56:57 2001
@@ -59,6 +59,11 @@
with the kernel option
.Dv MD_NSECT .
.Pp
+Be warned that due to kernel constraints such a
+.Nm
+disk cannot be bigger than a certain maximum size.
+This size can be found in the 'Limit' column of 'vmstat -m'.
+.Pp
At boot time the
.Nm
driver will search for pre-loaded modules of type
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