Date: Thu, 25 Oct 2012 17:37:48 GMT From: Harald von Fellenberg <productnews@hvf.ch> To: freebsd-gnats-submit@FreeBSD.org Subject: amd64/173078: Followup to amd64/170677: FreeBSD 9.x does not boot if 2 hard disks are on system Message-ID: <201210251737.q9PHbmEs025957@red.freebsd.org> Resent-Message-ID: <201210251740.q9PHe02Q088018@freefall.freebsd.org>
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>Number: 173078
>Category: amd64
>Synopsis: Followup to amd64/170677: FreeBSD 9.x does not boot if 2 hard disks are on system
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-amd64
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Oct 25 17:40:00 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Harald von Fellenberg
>Release: FreeBSD 9.1-RC1
>Organization:
>Environment:
FreeBSD orion-freebsd91.von-fellenberg.ch 9.1-RC1 FreeBSD 9.1-RC1 #0: Tue Aug 14 04:25:06 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
>Description:
Followup to my earlies bug report amd64/170677.
I instrumented the loader code (in /usr/src/sys/boot) with various printf's to see where the delay occurs. Here are my findings:
1. in /usr/src/sys/boot/common/devopen.c around line 47:
/* point to device-specific data so that device open can use it */
f->f_devdata = dev;
result = dev->d_dev->dv_open(f, dev);
if (result != 0) {
the call to dev->d_dev->dv_open(f, dev) always blocks for around 15 seconds, both for existing and non-existing files. Why is that?
2. the loader opens about 19 existing files (among them the kernel at /boot/kernel/kernel five times!) and tries to open about 18 non-existing files (among them /boot/kernel/linker.hints twice). Each open adds about 15 seconds, so the complete time to get to the loader menu is around 10 to 11 minutes.
I do not know why this delay occurs, why it only occurs when 2 HDs are present, and how it can be avoided. every help to solve this riddle is appreciated!
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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