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SubjectRe: [SCSI BUG 2.6.15-rc3-mm1] scheduling while atomic on boot time
On Fri, Dec 02, 2005 at 11:31:47AM -0800, Andrew Morton wrote:
> Wu Fengguang <wfg@mail.ustc.edu.cn> wrote:
> >
> > My server occasionally crashes on boot time, this has been happening in many
> > recent kernel versions(at least from 2.6.14-rcx). It is rare enough, I setup
> > netconsole and rebooted numerous times, but still failed to catch it. Luckily
> > it happened again this time, and does not panic. Here is the logs.
> >
> > Thanks,
> > Wu
> >
> > Error messages:
> > [4294676.927000] scheduling while atomic: ksoftirqd/0/0x00000200/3
>
> Which device driver are you using?
>
> This is just a warning - it won't necessarily cause a crash and in this
> case it didn't appear to do so.

I'm compiling in

CONFIG_MEGARAID_NEWGEN=y
CONFIG_MEGARAID_MM=y
CONFIG_MEGARAID_MAILBOX=y

Here is the boot message, notice that the error message appears immediately after the megaraid messages:

[4294674.139000] megaraid cmm: 2.20.2.6 (Release Date: Mon Mar 7 00:01:03 EST 2005)
[4294674.139000] megaraid: 2.20.4.6 (Release Date: Mon Mar 07 12:27:22 EST 2005)
[4294674.139000] megaraid: probe new device 0x1028:0x000f:0x1028:0x014a: bus 4:slot 3:func 0
[4294674.140000] ACPI: PCI Interrupt 0000:04:03.0[A] -> GSI 18 (level, low) -> IRQ 193
[4294674.144000] megaraid: fw version:[412W] bios version:[H406]
[4294674.145000] scsi0 : LSI Logic MegaRAID driver
[4294674.145000] scsi[0]: scanning scsi channel 0 [Phy 0] for non-raid devices
[4294674.914000] Vendor: PE/PV Model: 1x3 SCSI BP Rev: 1.1
[4294674.915000] Type: Processor ANSI SCSI revision: 02
[4294676.927000] scheduling while atomic: ksoftirqd/0/0x00000200/3

# lsmod
Module Size Used by
nfsd 234180 8
exportfs 6688 1 nfsd
lockd 65192 2 nfsd
nfs_acl 4224 1 nfsd
sunrpc 154460 3 nfsd,lockd,nfs_acl
ipx 32292 0
p8023 2272 1 ipx
af_packet 23528 4
ipt_TOS 2688 4
iptable_mangle 3136 1
iptable_nat 8004 0
iptable_filter 3296 0
ip_tables 23092 4 ipt_TOS,iptable_mangle,iptable_nat,iptable_filter
ip_nat_tftp 2112 0
ip_conntrack_tftp 4504 1 ip_nat_tftp
ip_nat_ftp 3552 0
ip_nat 19820 3 iptable_nat,ip_nat_tftp,ip_nat_ftp
ip_conntrack_ftp 7824 1 ip_nat_ftp
ip_conntrack 51192 6 iptable_nat,ip_nat_tftp,ip_conntrack_tftp,ip_nat_ftp,ip_nat,ip_conntrack_ftp
serverworks 9192 0 [permanent]
generic 4900 0 [permanent]
reiserfs 232560 7
ipv6 270144 46
tun 12160 0
rtc 13876 0
floppy 63204 0
pcspkr 2436 0
i2c_piix4 9360 0
i2c_core 22144 1 i2c_piix4
sworks_agp 9568 0
agpgart 35224 1 sworks_agp
ohci_hcd 21348 0
usbcore 129860 2 ohci_hcd
tsdev 8000 0
dm_mod 61208 8
ipmi_devintf 8872 0
ipmi_watchdog 19296 0
ipmi_si 35972 1
ipmi_msghandler 31712 3 ipmi_devintf,ipmi_watchdog,ipmi_si
psmouse 41444 0
loop 17352 0
sr_mod 17156 0
evdev 10016 0
mousedev 12112 1
unix 29648 43

> I seem to recall diagnosing this exact locking problem a month or so ago,
> and cc'ing linux-scsi on that analysis.

I find it, thank you.
http://marc.theaimsgroup.com/?l=linux-scsi&m=112737270900397&w=2

Wu
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