From: Scott Anderson <scott_anderson@mvista.com>
To: jim <jduey@ccc-dcs.com>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: Delay on starting init
Date: Tue, 24 Sep 2002 22:33:07 -0700 [thread overview]
Message-ID: <3D914A93.E02456F4@mvista.com> (raw)
In-Reply-To: 3D6E4A4A0000123A@charlotte.ccc-dcs.com
jim wrote:
> If anyone finds the cause of the delay on starting init with NFS root file
> systems, please post to the list.
I don't know the cause of the delay, but as I was debugging another
kernel problem, I remembered this and hit ^C in gdb a few times to see what
was going on. In both cases, it was handling mm faults. I attached
the output from my gdb macros just in case it jogs anyone's brain cells.
To really figure out what is going on, we may have to compare old vs.
new.
Scott
(gdb) ps
Address PID State User NIP Kernel NIP device comm
0xC013DFD0 0<Running 0xC00060E4 swapper
0xC0344000 1 Disksleep 0x30003578 0xC0006FD8 init
0xC03DA000 2 Sleeping 0xC0006FD8 keventd
0xC03D6000 3 Sleeping 0xC0006FD8 ksoftirqd_CPU0
0xC03D4000 4 Sleeping 0xC0006FD8 kswapd
0xC03D2000 5 Sleeping 0xC0006FD8 bdflush
0xC03D0000 6 Sleeping 0xC0006FD8 kupdated
0xC7DD4000 7 Sleeping 0xC0006FD8 rpciod
(gdb) kbt 1
Task "init":
0xC0345D40: 0xc0006fd8 <_switch_to+96>: stw r3,0(r30)
0xC0345D60: 0xc0010f30 <schedule+1368>: lwz r9,8(r31)
0xC0345D90: 0xc0028cd4 <__lock_page+192>: lwarx r0,r0,r28
0xC0345DC0: 0xc0028d48 <lock_page+52>: lwz r0,20(r1)
0xC0345DD0: 0xc002a528 <filemap_nopage+376>: lwz r0,8(r31)
0xC0345E00: 0xc0025b08 <do_no_page+116>: mr. r31,r3
0xC0345E30: 0xc0025ce0 <handle_mm_fault+112>:
b 0xc0025d58 <handle_mm_fault+232>
0xC0345E60: 0xc000ea74 <do_page_fault+652>: cmpwi r3,1
0xC0345F20: 0xc0004854 <ret_from_except>: lwz r3,148(r1)
(gdb) cont
Continuing.
Program received signal SIGSTOP, Stopped (signal).
idled () at idle.c:110
110 if (current->need_resched) {
(gdb) ps
Address PID State User NIP Kernel NIP device comm
0xC013DFD0 0<Running 0xC00060E4 swapper
0xC0344000 1 Disksleep 0x30003578 0xC0006FD8 init
0xC03DA000 2 Sleeping 0xC0006FD8 keventd
0xC03D6000 3 Sleeping 0xC0006FD8 ksoftirqd_CPU0
0xC03D4000 4 Sleeping 0xC0006FD8 kswapd
0xC03D2000 5 Sleeping 0xC0006FD8 bdflush
0xC03D0000 6 Sleeping 0xC0006FD8 kupdated
0xC7DD4000 7 Sleeping 0xC0006FD8 rpciod
(gdb) kbt 1
Task "init":
0xC0345D40: 0xc0006fd8 <_switch_to+96>: stw r3,0(r30)
0xC0345D60: 0xc0010f30 <schedule+1368>: lwz r9,8(r31)
0xC0345D90: 0xc0028cd4 <__lock_page+192>: lwarx r0,r0,r28
0xC0345DC0: 0xc0028d48 <lock_page+52>: lwz r0,20(r1)
0xC0345DD0: 0xc002a528 <filemap_nopage+376>: lwz r0,8(r31)
0xC0345E00: 0xc0025b08 <do_no_page+116>: mr. r31,r3
0xC0345E30: 0xc0025ce0 <handle_mm_fault+112>:
b 0xc0025d58 <handle_mm_fault+232>
0xC0345E60: 0xc000ea74 <do_page_fault+652>: cmpwi r3,1
0xC0345F20: 0xc0004854 <ret_from_except>: lwz r3,148(r1)
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2002-09-25 5:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-11 12:34 Delay on starting init jim
2002-09-12 1:24 ` David Gibson
2002-09-12 1:32 ` Jin Cheng
2002-09-12 10:27 ` jim
2002-09-25 5:33 ` Scott Anderson [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3D914A93.E02456F4@mvista.com \
--to=scott_anderson@mvista.com \
--cc=jduey@ccc-dcs.com \
--cc=linuxppc-embedded@lists.linuxppc.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).