Date: Wed, 14 Jul 2004 13:30:56 -0400 From: Sven Willenberger <sven@dmv.com> To: Mark Santcroos <marks@ripe.net> Cc: current@freebsd.org Subject: Re: Stack backtrace: how can I help? Message-ID: <1089826256.21709.14.camel@lanshark.dmv.com> In-Reply-To: <20040630233031.GA12942@laptop.6bone.nl> References: <1088624045.1179.25.camel@lanshark.dmv.com> <20040630233031.GA12942@laptop.6bone.nl>
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On Thu, 2004-07-01 at 01:30 +0200, Mark Santcroos wrote:
> Hi,
>
> On Wed, Jun 30, 2004 at 03:34:05PM -0400, Sven Willenberger wrote:
> > Under heavy loads, on 5.2.1-P8 systems, I get a Stack backtrace relating
> > to flushing dirty buffers (ffs_fsync).
>
> Best would be if you first try to reproduce it on another machine.
>
> If you are able to reproduce it on another machine using the same freebsd
> version, next what you should do is upgrade that machine to the latest
> -current and try to reproduce it again.
>
> If you then still get the panic I will look at it on my own machine.
>
> Thanks
>
FreeBSD -current July 1, 2004 :00:00:00 (prior to the whole preemption
deal)
Stack backtrace:
backtrace(c4155300,1,f2b01c14,f2b01c00,c05f0dec) at backtrace+0x12
getdirtybuf(f2b01bf0,0,1,e18437b0,1) at getdirtybuf+0x2c
flush_deplist(c41559cc,1,f2b01c14) at flush_deplist+0x30
flush_inodedep_deps(c26a6000,5c0a1,c06d1bf8,f2b01c60,c050238c) at
flush_inodedep_deps+0x82
softdep_sync_metadata(f2b01cb0) at softdep_sync_metadata+0x76
ffs_fsync(f2b01cb0) at ffs_fsync+0x332
fsync(c2d0ab00,f2b01d14,1,1b1,286) at fsync+0x10b
syscall(2f,282d002f,bfbf002f,0,80e6440) at syscall+0x217
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (95), eip = 0x282726bb, esp = 0xbfbf9dcc, ebp = 0xbfbfb768
---
Again this occured during an onslaught of email and the machine did not
recover. It did backtrace after backtrace until it exhausted memory and
swap space. Latest perl (5.8.4) with all modules rebuilt against it.
Spamassassin/spamd and running spa
Top part of kernel config file:
# $FreeBSD: src/sys/i386/conf/GENERIC,v 1.405 2004/05/28 00:22:59
tackerman Exp $
machine i386
cpu I486_CPU
cpu I586_CPU
cpu I686_CPU
ident GENERIC
# To statically compile in device wiring instead of /boot/device.hints
#hints "GENERIC.hints" # Default places to look for
devices.
makeoptions DEBUG=-g # Build kernel with gdb(1) debug
symbols
options SCHED_ULE # ULE scheduler
options INET # InterNETworking
options INET6 # IPv6 communications protocols
options FFS # Berkeley Fast Filesystem
options SOFTUPDATES # Enable FFS soft updates
support
options UFS_ACL # Support for access control
lists
options UFS_DIRHASH # Improve performance on big
directories
options MD_ROOT # MD is a potential root device
options NFSCLIENT # Network Filesystem Client
options NFSSERVER # Network Filesystem Server
options NFS_ROOT # NFS usable as /, requires
NFSCLIENT
options MSDOSFS # MSDOS Filesystem
options CD9660 # ISO 9660 Filesystem
options PROCFS # Process filesystem (requires
PSEUDOFS)
options PSEUDOFS # Pseudo-filesystem framework
options GEOM_GPT # GUID Partition Tables.
options COMPAT_43 # Compatible with BSD 4.3 [KEEP
THIS!]
options COMPAT_FREEBSD4 # Compatible with FreeBSD4
options SCSI_DELAY=5000 # Delay (in ms) before probing
SCSI
options KTRACE # ktrace(1) support
options SYSVSHM # SYSV-style shared memory
options SYSVMSG # SYSV-style message queues
options SYSVSEM # SYSV-style semaphores
options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time
extensions
options KBD_INSTALL_CDEV # install a CDEV entry in /dev
options AHC_REG_PRETTY_PRINT # Print register bitfields in
debug
# output. Adds ~128k to driver.
options AHD_REG_PRETTY_PRINT # Print register bitfields in
debug
# output. Adds ~215k to driver.
options PFIL_HOOKS # pfil(9) framework
# KVM
options VM_KMEM_SIZE_SCALE="2"
options VM_KMEM_SIZE_MAX="(512*1024*1024)"
#options KVA_PAGES=512
# Debugging for use in -current
options DDB # Enable the kernel debugger
options DDB_UNATTENDED
options INVARIANTS # Enable calls of extra sanity
checking
options INVARIANT_SUPPORT # Extra sanity checks of
internal structures, required by INVARIANTS
options WITNESS # Enable checks to detect
deadlocks and cycles
options WITNESS_SKIPSPIN # Don't run witness on spinlocks
for speed
# To make an SMP kernel, the next two are needed
options SMP # Symmetric MultiProcessor Kernel
device apic # I/O APIC
Sven
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