Date: Thu, 1 May 2008 02:00:10 GMT From: Bob Frazier <bobf@mrp3.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/123140: [smp] SMP boot causes slow KB, ATA drives not detected Message-ID: <200805010200.m4120AWV017526@freefall.freebsd.org>
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The following reply was made to PR kern/123140; it has been noted by GNATS.
From: Bob Frazier <bobf@mrp3.com>
To: bug-followup@FreeBSD.org
Cc: gavin@FreeBSD.org
Subject: Re: kern/123140: [smp] SMP boot causes slow KB, ATA drives not detected
Date: Wed, 30 Apr 2008 19:52:41 -0700
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re-compiled kernel with latest (7-RELEASE) source, and added debugging
to kernel to troubleshoot locks. Here's a snapshot of the requested
information.
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filename="log4.txt"
ata2: SATA connect time=0ms
ata2: reset tp1 mask=01 ostat0=58 ostat1=00
ata2: stat0=0x50 err=0x01 lsb=0x00 msb=0x00
ata2: reset tp2 stat0=50 stat1=00 devices=0x1<ATA_MASTER>
ata2: reinit done ..
KDB: enter: manual escape to debugger
[thread pid 22 tid 100021 ]
Stopped at kdb_enter_why+0x3a: movl $0,kdb_why
db> show alllocks
Process 22 (swi6: Giant taskq) thread 0xc522e220 (100021)
exclusive sleep mutex Giant r = 0 (0xc0bcc3f0) locked @ /usr/src/sys/kern/kern_intr.c:1035
db> show lock 0xc0bcc3f0
class: sleep mutex
name: Giant
flags: {DEF, RECURSE}
state: {OWNED, CONTESTED}
owner: 0xc522e220 (tid 100021, pid 22, "swi6: Giant taskq")
db> show locktree
db> show allchains
chain 1:
thread 100007 (pid 16, swi4: clock sio) blocked on lock 0xc0bcc3f0 (sleep mutex) "Giant"
thread 100021 (pid 22, swi6: Giant taskq) running on CPU 0
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