The scheduler on Andreas Friedrich's hyperthreading system stopped
working properly: the scheduler would never move tasks to another CPU!
The lask known working kernel was 2.6.8.
After a couple of attempts to corner the bug, the following smoking gun
was found:
BIOS reported wrong ACPI idfor the processor
CPU#1: set_cpus_allowed(), swapper:1, 3 -> 2
[<c0103bbe>] show_trace_log_lvl+0x34/0x4a
[<c0103ceb>] show_trace+0x2c/0x2e
[<c01045f8>] dump_stack+0x2b/0x2d
[<c0116a77>] set_cpus_allowed+0x52/0xec
[<c0101d86>] cpu_idle_wait+0x2e/0x100
[<c0259c57>] acpi_processor_power_exit+0x45/0x58
[<c0259752>] acpi_processor_remove+0x46/0xea
[<c025c6fb>] acpi_start_single_object+0x47/0x54
[<c025cee5>] acpi_bus_register_driver+0xa4/0xd3
[<c04ab2d7>] acpi_processor_init+0x57/0x77
[<c01004d7>] init+0x146/0x2fd
[<c0103a87>] kernel_thread_helper+0x7/0x10
a quick look at cpu_idle_wait() shows how broken that code is
on i386: it changes the init task's affinity map but never
restores it ...
and because all userspace tasks get forked by init, they all
inherited that single-CPU affinity mask. x86_64 cloned this
bug too.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Andreas Friedrich <andreas.friedrich@fujitsu-siemens.com>
Cc: Wolfgang Erig <Wolfgang.Erig@fujitsu-siemens.com>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
the new dwarf2 unwinder crashes while trying to dump the stack:
Leftover inexact backtrace:
Unable to handle kernel paging request at ffffffff82800000 RIP:
[<ffffffff8026cf26>] dump_trace+0x35b/0x3d2
PGD 203027 PUD 205027 PMD 0
Oops: 0000 [2] PREEMPT SMP
CPU 0
Modules linked in:
Pid: 30, comm: khelper Not tainted 2.6.19-rc6-rt1 #11
RIP: 0010:[<ffffffff8026cf26>] [<ffffffff8026cf26>] dump_trace+0x35b/0x3d2
RSP: 0000:ffff81003fb9d848 EFLAGS: 00010006
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff805b3520 RDI: 0000000000000000
RBP: ffffffff827ffff9 R08: ffffffff80aad000 R09: 0000000000000005
R10: ffffffff80aae000 R11: ffffffff8037961b R12: ffff81003fb9d858
R13: 0000000000000000 R14: ffffffff80598460 R15: ffffffff80ab1fc0
FS: 0000000000000000(0000) GS:ffffffff806c4200(0000) knlGS:0000000000000000
CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: ffffffff82800000 CR3: 0000000000201000 CR4: 00000000000006e0
this crash happened because it did not sanitize the dwarf2 data it
got, and got an unaligned stack pointer - which happily walked past
the process stack (and eventually reached the end of kernel memory
and pagefaulted there) due to this naive iteration condition:
HANDLE_STACK (((long) stack & (THREAD_SIZE-1)) != 0);
note that i386 is alot more conservative when it comes to trusting
stack pointers:
static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
{
return p > (void *)tinfo &&
p < (void *)tinfo + THREAD_SIZE - 3;
}
but the x86_64 code did not take this bit of i386 code.
The fix is to align the stack pointer.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Cc: Jan Beulich <jbeulich@novell.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Benh points out that the msgs[0].flags entry never got initialized, and
since it's an automatic stack allocation, it could have any random
value, which is bad.
Rewrite the initializer to explicitly initialize all fields of the small
i2c_msg structure array we generate. Just to keep it all obvious, let's
handle msgs[1].buf in the same initializer while we're at it, instead of
initializing that one separately later.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
When radeonfb was changed to use the new "generic" ddc, a bit of
code initializing the GPIO lines was lost, causing it to not work
if the firmware didn't configure them properly, which seems to
happen on some cards.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6:
aoe: Add forgotten NULL at end of attribute list in aoeblk.c
debugfs: check return value correctly
W1: ioremap balanced with iounmap
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6:
USB: auerswald possible memleak fix
USB: ipaq: Add HTC Modem Support
USB: Fixed outdated usb_get_device_descriptor() documentation
usb-storage: Remove duplicated unusual_devs.h entries for Sony Ericsson P990i
USB: hid-core: Add quirk for new Apple keyboard/trackpad
USB Storage: unusual_devs.h entry for Sony Ericsson P990i
USB: correct keymapping on Powerbook built-in USB ISO keyboards
USB: OHCI: fix root-hub resume bug
USB: Fix UCR-61S2B unusual_dev entry
USB: ftdi driver pid for dmx-interfaces
USB: ftdi_sio: adds vendor/product id for a RFID construction kit
OHCI: disallow autostop when wakeup is not available
This caused the system to stall when the aoe module was loaded. The
error was introduced in commit 4ca5224f3e
Signed-off-by: Dennis Stosberg <dennis@stosberg.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The return value is stored in "*dentry", not in "dentry".
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
ioremap must be balanced with iounmap in error path.
Please consider for 2.6.19.
Signed-off-by: Amol Lad <amol@verismonetworks.com>
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Adds support for HTC Smart Phones in modem mode (as opposed to sync
mode). Loads and works with pppd on my T-Mobile SDA.
Signed-off-by: Alex Sanks <alex@sanks.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
usb_get_device_descriptor() used to convert several descriptor fields to host
CPU's byte order. Now that it doesn't convert them anymore, update the
documentation to reflect this.
Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
For some reason the unusual_devs.h entry for Sony Ericsson P990i had
three identical copies in a wrong place in the file in addition to the
correct entry.
Signed-off-by: Sergey Vlasov <vsu@altlinux.ru>
Signed-off-by: Phil Dibowitz <phil@ipom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The new Core2 Duo MacBook Pro have a new keyboard+trackpad device.
The following patch adds the needed HID quirk for the Fn key.
Signed-off-by: Julien BLACHE <jb@jblache.org>
Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
USB Storage: this patch adds support for Sony Ericsson P990i
Signed-off-by: Jan Mate <mate@fiit.stuba.sk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
similar to the version in adbhid_input_register(): The '<>' key and the
'^°' key on a german keyboard is swapped. Provide correct keys to
userland, external USB keyboards will not work correctly when the
'badmap'/'goodmap' workarounds from xkeyboard-config are used.
It is expected that distributions drop the badmap/goodmap part from
keycodes/macintosh in the xkeyboard-config package.
This is probably 2.6.18.x material, if major distros settle on 2.6.18.
Signed-off-by: Olaf Hering <olh@suse.de>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
When a suspended OHCI controller sees a port's status change, it sets
both the Root-Hub-Status-Change and the Resume-Detect bits in the
Interrupt Status register. Processing both these bits, the driver
tries to resume the root hub twice!
This patch (as807) fixes the bug by ignoring RD if RHSC is set. It
also prints a slightly more informative log message when a
remote-wakeup event occurs.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Recently this entry's bcd scope was narrowed so as not to falsly apply
to bcd's other than 0x0110. But while it breaks those of a larger bcd,
it is still needed for those of a smaller bcd - so this changes the
lower bcd limit to 0x0000.
Signed-off-by: Phil Dibowitz <phil@ipom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Please add a usb pid to the ftdi_sio driver. The pid is used by dmx4all
dmx-interfaces (for stage lighting).
The interfaces are using the usb-id 0403:c850. I added the id to the driver
and it works perfectly. I added a patch for linux 2.6.18.1, too.
From: Frank Sievertsen <frank@sievertsen.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Adds the vendor and prodcut id for a RFID construction kit from the
Elektor Electronics magazine, september 2006.
From: Kjell Myksvoll <kmyksvo@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as822) prevents the OHCI autostop mechanism from kicking in
if the root hub is not able or not allowed to issue wakeup requests.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
on x86_64, the CONFIG_CC_STACKPROTECTOR build fails if used in a
distcc setup that has "CC" defined to "distcc gcc":
gcc: gcc: linker input file unused because linking not done
gcc: gcc: linker input file unused because linking not done
gcc: gcc: linker input file unused because linking not done
this is because the gcc-x86_64-has-stack-protector.sh script
has a 2-parameters assumption. Fix this by passing $(CC) as
a single parameter.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Please-Use-Me-More: make randconfig
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Ingo Molnar
Linus Torvalds
Benjamin Herrenschmidt
Dennis Stosberg
Akinobu Mita
Amol Lad
Mariusz Kozlowski
Alex Sanks
Laurent Pinchart
Sergey Vlasov
Julien BLACHE
Jan Mate
Olaf Hering
Alan Stern
Phil Dibowitz
Frank Sievertsen
Kjell Myksvoll
Andi Kleen