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Message-ID: <48BB2116.1060904@lwfinger.net>
Date: Sun, 31 Aug 2008 17:54:14 -0500
From: Larry Finger <Larry.Finger@...inger.net>
To: LKML <linux-kernel@...r.kernel.org>,
"Rafael J. Wysocki" <rjw@...k.pl>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Alok Kataria <akataria@...are.com>
CC: Michael Buesch <mb@...sch.de>
Subject: Regression in 2.6.27 caused by commit bfc0f59
An ancient laptop of mine started throwing errors from b43legacy when
I started using 2.6.27 on it. This has been bisected to commit bfc0f59
"x86: merge tsc calibration". Incidentally, I was appalled at the
number of build errors that were found while bisecting in this region.
Every commit from 2.6.26-rc9-00715 to at least -00719 had include
errors that had to be fixed before it would compile. Those fixes are
the only reason that the builds below are "dirty".
The CPU in this computer is an AMD-K6 at stepping 0c and running at
450 MHz.
The critical differences in the dmesg output between the "good" and
"bad" results indicate a factor of 2 difference in the clock speed,
and are shown below:
============================================================
finger@...rylap:/ide1/mtech/wireless-testing> diff -u /ide1/dmesg.good
/ide1/dmesg.bad
--- /ide1/dmesg.good 2008-08-31 16:23:32.000000000 -0500
+++ /ide1/dmesg.bad 2008-08-31 16:26:25.000000000 -0500
@@ -1,4 +1,4 @@
-Linux version 2.6.26-rc9-test-00715-g0ef9553-dirty (finger@...rylap)
(gcc version 4.3.1 20080507 (prerelease) [gcc-4_3-branch revision
135036] (SUSE Linux) ) #29 Sun Aug 31 15:37:05 ACT 2008
+Linux version 2.6.26-rc9-test-00716-gbfc0f59-dirty (finger@...rylap)
(gcc version 4.3.1 20080507 (prerelease) [gcc-4_3-branch revision
135036] (SUSE Linux) ) #31 Sun Aug 31 16:52:23 ACT 2008
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
@@ -54,7 +54,8 @@
Kernel command line: root=/dev/sda3 vga=0x314 resume=/dev/sda2
splash=silent
Initializing CPU#0
PID hash table entries: 1024 (order: 10, 4096 bytes)
-Detected 428.846 MHz processor.
+TSC calibrated against PM_TIMER
+Detected 214.401 MHz processor.
Console: colour dummy device 80x25
console [tty0] enabled
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
@@ -69,7 +70,7 @@
.text : 0xc0100000 - 0xc02638ac (1422 kB)
Checking if this processor honours the WP bit even in supervisor
mode...Ok.
CPA: page pool initialized 1 of 1 pages preallocated
-Calibrating delay loop (skipped), value calculated using timer
frequency.. <6>857.69 BogoMIPS (lpj=1715384)
+Calibrating delay loop (skipped), value calculated using timer
frequency.. <6>428.80 BogoMIPS (lpj=857604)
Security Framework initialized
Capability LSM initialized
Mount-cache hash table entries: 512
@@ -140,6 +141,7 @@
TCP reno registered
NET: Registered protocol family 1
checking if image is initramfs... it is
+Clocksource tsc unstable (delta = 500037272 ns)
Freeing initrd memory: 4071k freed
ACPI: EC: non-query interrupt received, switching to interrupt mode
ACPI: EC: GPE storm detected, disabling EC GPE
@@ -174,11 +176,10 @@
TCP cubic registered
Using IPI Shortcut mode
Freeing unused kernel memory: 184k freed
-Clocksource tsc unstable (delta = 83950402 ns)
ACPI: ACPI0007:00 is registered as cooling_device0
ACPI: Processor [CPU0] (supports 8 throttling states)
ACPI: LNXTHERM:01 is registered as thermal_zone0
-ACPI: Thermal Zone [THRM] (50 C)
+ACPI: Thermal Zone [THRM] (51 C)
No dock devices found.
SCSI subsystem initialized
libata version 3.00 loaded.
@@ -306,7 +307,10 @@
b43legacy-phy0: Loading firmware version 0x127, patch level 14
(2005-04-18 02:36:27)
b43legacy-phy0 debug: Chip initialized
b43legacy-phy0 debug: 30-bit DMA initialized
+b43legacy-phy0 ERROR: PHY transmission error
b43legacy-phy0 debug: Wireless interface started
+b43legacy-phy0 ERROR: PHY transmission error
+b43legacy-phy0 ERROR: PHY transmission error
b43legacy-phy0 debug: Adding Interface type 2
NET: Registered protocol family 17
eth1: Initial auth_alg=0
=======================================================
I am eager to test trial patches.
Thanks,
Larry
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