Date: Tue, 23 Aug 2011 00:10:17 +0400 (MSD) From: Dmitry Morozovsky <marck@FreeBSD.org> 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.2.00.1108230006530.26004@woozle.rinet.ru> In-Reply-To: <20110822194031.GR17489@deviant.kiev.zoral.com.ua> References: <alpine.BSF.2.00.1108222151140.8634@woozle.rinet.ru> <20110822194031.GR17489@deviant.kiev.zoral.com.ua>
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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?
-- 8< --
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" # CAM bus registration delay (in ms),
+ # 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
-- 8< --
--
Sincerely,
D.Marck [DM5020, MCK-RIPE, DM3-RIPN]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@FreeBSD.org ***
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