2.6.16-rc[12] weirdness

["Ben Castricum" <lk@bencastricum.nl>]

I just want to report a couple of things I think are kernel related (since 
they only occur when I run 2.6.16-rc*) but are too weird to be sure.

The most annoying is that my PPP connection to my ADSL modem randomly seems 
to stop functioning. No messages are other signs of problems. It just hangs. 
Killing the pppd and restarting it fixes this.

My /dev/null device gets replaced by a file. Some of my cronjobs have a 
>/dev/null and can see the ouput of the scripts in /dev/null. Deleting the 
file and recreating the device again is fixes this. And again.. this seems 
to happen randomly.

When comparing the bootmessages from 2.6.15 and 2.6.16-rc2:

------------------------------------------------------------------------------------------------------------------
root@gateway:/var/log# diff -u bootmessages-2.6.15 bootmessages-2.6.16-rc2
--- bootmessages-2.6.15 2006-02-03 20:57:40.000000000 +0100
+++ bootmessages-2.6.16-rc2     2006-02-03 19:29:53.000000000 +0100
@@ -1,4 +1,4 @@
-Linux version 2.6.15 (root@gateway) (gcc version 3.4.4) #34 Tue Jan 3 
08:37:04 CET 2006
+Linux version 2.6.16-rc2 (root@gateway) (gcc version 3.4.4) #37 Fri Feb 3 
08:54:42 CET 2006
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
@@ -20,20 +20,22 @@
ACPI: PM-Timer IO Port: 0x4008
Allocating PCI resources starting at 20000000 (gap: 13800000:ec7f0000)
Built 1 zonelists
-Kernel command line: auto BOOT_IMAGE=2.6.15 ro root=301 init=/sbin/there 
nmi_watchdog=2 mce lapic
+Kernel command line: BOOT_IMAGE=Linux-2.6 ro root=301 init=/sbin/there 
nmi_watchdog=2 mce lapic
Local APIC disabled by BIOS -- reenabling.
Found and enabled local APIC!
mapped APIC to ffffd000 (fee00000)
+Enabling fast FPU save and restore... done.
+Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
PID hash table entries: 2048 (order: 11, 32768 bytes)
-Detected 933.512 MHz processor.
+Detected 933.506 MHz processor.
Using pmtmr for high-res timesource
Console: colour VGA+ 132x43
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
-Memory: 314076k/319424k available (1395k kernel code, 4884k reserved, 300k 
data, 124k init, 0k highmem)
+Memory: 314048k/319424k available (1403k kernel code, 4912k reserved, 324k 
data, 124k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... 
Ok.
-Calibrating delay using timer specific routine.. 1869.02 BogoMIPS 
(lpj=3738054)
+Calibrating delay using timer specific routine.. 1869.76 BogoMIPS 
(lpj=3739526)
Mount-cache hash table entries: 512
CPU: After generic identify, caps: 0383fbff 00000000 00000000 00000000 
00000000 00000000 00000000
CPU: After vendor identify, caps: 0383fbff 00000000 00000000 00000000 
00000000 00000000 00000000
@@ -42,16 +44,13 @@
CPU: After all inits, caps: 0383fbff 00000000 00000000 00000040 00000000 
00000000 00000000
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
-mtrr: v2.0 (20020519)
CPU: Intel Pentium III (Coppermine) stepping 0a
-Enabling fast FPU save and restore... done.
-Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
ACPI: setting ELCR to 0020 (from 1c20)
NET: Registered protocol family 16
ACPI: bus type pci registered
PCI: Using configuration type 1
-ACPI: Subsystem revision 20050902
+ACPI: Subsystem revision 20060127
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (0000:00)
@@ -68,7 +67,7 @@
ACPI: PCI Interrupt Link [LNKD] (IRQs 1 3 4 5 6 7 *10 11 12 14 15)
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI init
-pnp: PnP ACPI: found 11 devices
+pnp: PnP ACPI: found 12 devices
PCI: Using ACPI for IRQ routing
PCI: If a device doesn't work, try "pci=routeirq".  If it helps, post a 
report
PCI: Bridge: 0000:00:01.0
@@ -80,7 +79,7 @@
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
Initializing Cryptographic API
io scheduler noop registered
-io scheduler anticipatory registered
+io scheduler anticipatory registered (default)
PNP: PS/2 Controller [PNP0303:PS2K] at 0x60,0x64 irq 1
PNP: PS/2 controller doesn't have AUX irq; using default 12
serio: i8042 AUX port at 0x60,0x64 irq 12
@@ -104,7 +103,7 @@
ide1 at 0x170-0x177,0x376 on irq 15
hda: max request size: 128KiB
hda: 58633344 sectors (30020 MB) w/2048KiB Cache, CHS=58168/16/63, UDMA(66)
-hda: cache flushes not supported
+hda: cache flushes notsupported
 hda: hda1
hdb: max request size: 128KiB
hdb: 156355584 sectors (80054 MB) w/1819KiB Cache, CHS=65535/16/63, 
UDMA(66)
@@ -135,8 +134,9 @@
EXT3-fs warning: maximal mount count reached, running e2fsck is recommended
EXT3 FS on hdb3, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
-Real Time Clock Driver v1.12
+Real Time Clock Driver v1.12ac
Software Watchdog Timer: 0.07 initialized. soft_noboot=0 soft_margin=60 sec 
(nowayout= 0)
+Driver 'via686a' needs updating - please use bus_type methods
i2c_adapter i2c-9191: forcing ISA address 0x6000
usbcore: registered new driver usbfs
usbcore: registered new driver hub
@@ -147,12 +147,14 @@
uhci_hcd 0000:00:04.2: UHCI Host Controller
uhci_hcd 0000:00:04.2: new USB bus registered, assigned bus number 1
uhci_hcd 0000:00:04.2: irq 10, io base 0x0000d400
+usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
usb 1-2: new full speed USB device using uhci_hcd and address 2
+usb 1-2: configuration #1 chosen from 1 choice
cdc_acm 1-2:1.0: ttyACM0: USB ACM device
usbcore: registered new driver cdc_acm
-drivers/usb/class/cdc-acm.c: v0.23:USB Abstract Control Model driver for 
USB modems and ISDN adapters
+drivers/usb/class/cdc-acm.c: v0.25:USB Abstract Control Model driver for 
USB modems and ISDN adapters
8139too Fast Ethernet driver 0.9.27
ACPI: PCI Interrupt 0000:00:05.0[A] -> Link [LNKD] -> GSI 10 (level, 
low) -> IRQ 10
eth0: RealTek RTL8139 at 0xd4078000, 00:50:fc:85:89:e0, IRQ 10
@@ -169,8 +171,7 @@
PPP BSD Compression module registered
PPP Deflate Compression module registered
ip_conntrack version 2.4 (2495 buckets, 19960 max) - 212 bytes per 
conntrack
-ip_tables: (C) 2000-2002 Netfilter core team
+ip_tables: (C) 2000-2006 Netfilter Core Team
process `sockd' is using obsolete setsockopt SO_BSDCOMPAT
process `named' is using obsolete setsockopt SO_BSDCOMPAT
-process `sockd' is using obsolete setsockopt SO_BSDCOMPAT
NET: Registered protocol family 17
------------------------------------------------------------------------------------------------------------------

I seem to have lost my MTRR (although I am not sure if I really have them 
and are properly detected) and gained a PnP ACPI device. (And there is a new 
typo in the hda cache flush detection).

I know this is a useless bug report, but I'll gladly supply more information 
if somebody has a clue on what's going on. I've placed a copy of my .config 
at http://www.bencastricum.nl/.config

Thanks,
Ben 

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