Date: Tue, 23 Aug 2011 00:57:05 +0400 (MSD) From: Dmitry Morozovsky <marck@rinet.ru> To: Kostik Belousov <kostikbel@gmail.com> Cc: freebsd-scsi@freebsd.org, mav@freebsd.org, re@freebsd.org Subject: Re: Documentating patch for defaults/loader.conf Message-ID: <alpine.BSF.2.00.1108230055350.26004@woozle.rinet.ru> In-Reply-To: <alpine.BSF.2.00.1108230006530.26004@woozle.rinet.ru> References: <alpine.BSF.2.00.1108222151140.8634@woozle.rinet.ru> <20110822194031.GR17489@deviant.kiev.zoral.com.ua> <alpine.BSF.2.00.1108230006530.26004@woozle.rinet.ru>
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On Tue, 23 Aug 2011, Dmitry Morozovsky wrote:
> On Mon, 22 Aug 2011, Kostik Belousov wrote:
>
> > > any objections for this simple patch?
> > >
> > > (we stumped into this yesterday, and no easy founded answers even on Google
> > > except the single FreeBSD Forums thread was found)
> >
> > I do not think that the wording in right, but I am not CAM expert by any
> > measure. From my reading of the code, it is a hook to delay the root mount,
> > not to delay CAM bus registration. It would be better if you get the scsi@
> > or mav@ (author of the tunable) review.
>
> I based the comment on existing comment to the tunable in cam_xpt.c:
>
> cam_xpt.c:TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay);
> cam_xpt.c:SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
> cam_xpt.c: &xsoftc.boot_delay, 0, "Bus registration wait time");
>
>
> Alexander, colleagues, your thought on the following patch?
[reply by mav@ viewed on web archives, but lost somewhere]
Well, what about the following wording then?
marck@woozle:~/FreeBSD/svn/head/sys> svn diff
Index: boot/forth/loader.conf
===================================================================
--- boot/forth/loader.conf (revision 224542)
+++ boot/forth/loader.conf (working copy)
@@ -109,6 +109,8 @@
#kern.ncallout="" # Set the maximum # of timer events
#kern.ngroups="1023" # Set the maximum # of supplemental groups
#kern.sgrowsiz="" # Set the amount to grow stack
+#kern.cam.boot_delay="10000" # Delay (in ms) for CAM bus registration,
+ # useful for USB sticks as root
#kern.cam.scsi_delay="2000" # Delay (in ms) before probing SCSI
#kern.ipc.maxsockets="" # Set the maximum number of sockets avaliable
#kern.ipc.nmbclusters="" # Set the number of mbuf clusters
--
Sincerely,
D.Marck [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer: marck@FreeBSD.org ]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru ***
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