- 10 Jan, 2006 28 commits
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Vivek Goyal authored
- Saving the cpu registers of all cpus before booting in to the crash kernel. - crash_setup_regs will save the registers of the cpu on which panic has occured. One of the concerns ppc64 folks raised is that after capturing the register states, one should not pop the current call frame and push new one. Hence it has been inlined. More call frames later get pushed on to stack (machine_crash_shutdown() and machine_kexec()), but one will not want to backtrace those. - Not very sure about the CFI annotations. With this patch I am getting decent backtrace with gdb. Assuming, compiler has generated enough debugging information for crash_kexec(). Coding crash_setup_regs() in pure assembly makes it tricky because then it can not be inlined and we don't want to return back after capturing register states we don't want to pop this call frame. - Saving the non-panicing cpus registers will be done in the NMI handler while shooting down them in machine_crash_shutdown. - Introducing CRASH_DUMP option in Kconfig for x86_64. Signed-off-by:
Murali M Chakravarthy <muralim@in.ibm.com> Signed-off-by:
Vivek Goyal <vgoyal@in.ibm.com> Cc: Andi Kleen <ak@muc.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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akpm@osdl.org authored
) From: Vivek Goyal <vgoyal@in.ibm.com> - Implementing the machine_crash_shutdown for x86_64 which will be called by crash_kexec (called in case of a panic, sysrq etc.). Here we do things similar to i386. Disable the interrupts, shootdown the cpus and shutdown LAPIC and IOAPIC. Changes in this version: - As the Eric's APIC initialization patches are reverted back, reintroducing LAPIC and IOAPIC shutdown. - Added some comments on CPU hotplug, modified code as suggested by Andi kleen. Signed-off-by:
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Vivek Goyal authored
- elfcorehdr= specifies the location of elf core header stored by the crashed kernel. This command line option will be passed by the kexec-tools to capture kernel. Changes in this version : - Added more comments in kernel-parameters.txt and in code. Signed-off-by:
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akpm@osdl.org authored
) From: Vivek Goyal <vgoyal@in.ibm.com> - This patch introduces the memmap option for x86_64 similar to i386. - memmap=exactmap enables setting of an exact E820 memory map, as specified by the user. Changes in this version: - Used e820_end_of_ram() to find the max_pfn as suggested by Andi kleen. - removed PFN_UP & PFN_DOWN macros - Printing the user defined map also. Signed-off-by:
Hariprasad Nellitheertha <nharipra@gmail.com> Signed-off-by:
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akpm@osdl.org authored
) From: Vivek Goyal <vgoyal@in.ibm.com> crash_setup_regs() is an architecture dependent function which is called in architecture independent section. So every architecture supporting kexec should at least provide a dummy definition of crash_setup_regs() even if crash dumping is not implemented yet, to avoid build failures. Signed-off-by:
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Vivek Goyal authored
Fixes a compilation warning message in i386 Signed-off-by:
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Vivek Goyal authored
- If system panics then cpu register states are captured through funciton crash_get_current_regs(). This is not a inline function hence a stack frame is pushed on to the stack and then cpu register state is captured. Later this frame is popped and new frames are pushed (machine_kexec). - In theory this is not very right as we are capturing register states for a frame and that frame is no more valid. This seems to have created back trace problems for ppc64. - This patch fixes it up. The very first thing it does after entering crash_kexec() is to capture the register states. Anyway we don't want the back trace beyond crash_kexec(). crash_get_current_regs() has been made inline - crash_setup_regs() is the top architecture dependent function which should be responsible for capturing the register states as well as to do some architecture dependent tricks. For ex. fixing up ss and esp for i386. crash_setup_regs() has also been made inline to ensure no new call frame is pushed onto stack. Signed-off-by:
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Vivek Goyal authored
Removes the call to get_cpu() and put_cpu() as it is not required. Signed-off-by:
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Vivek Goyal authored
- Kexec on panic functionality allocates memory for saving cpu registers in case of system crash event. Address of this allocated memory needs to be exported to user space, which is used by kexec-tools. - Previously, a single /sys/kernel/crash_notes entry was being exported as memory allocated was a single continuous array. Now memory allocation being dyanmic and per cpu based, address of per cpu buffer is exported through "/sys/devices/system/cpu/cpuX/crash_notes" Signed-off-by:
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Vivek Goyal authored
- In case of system crash, current state of cpu registers is saved in memory in elf note format. So far memory for storing elf notes was being allocated statically for NR_CPUS. - This patch introduces dynamic allocation of memory for storing elf notes. It uses alloc_percpu() interface. This should lead to better memory usage. - Introduced based on Andi Kleen's and Eric W. Biederman's suggestions. - This patch also moves memory allocation for elf notes from architecture dependent portion to architecture independent portion. Now crash_notes is architecture independent. The whole idea is that size of memory to be allocated per cpu (MAX_NOTE_BYTES) can be architecture dependent and allocation of this memory can be architecture independent. Signed-off-by:
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akpm@osdl.org authored
) From: Vivek Goyal <vgoyal@in.ibm.com> This patch fixes a minor bug based on Andi Kleen's suggestion. asm's can't be broken in this particular case, hence merging them. Signed-off-by:
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Alexey Dobriyan authored
Do it via Kconfig rather than via #error. Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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akpm@osdl.org authored
) From: Brian Gerst <bgerst@didntduck.org> Call sched_setscheduler() directly instead. Signed-off-by:
Brian Gerst <bgerst@didntduck.org> Signed-off-by:
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akpm@osdl.org authored
) From: Adrian Bunk <bunk@stusta.de> - create one common dump_thread() prototype in kernel.h - dump_thread() is only used in fs/binfmt_aout.c and can therefore be removed on all architectures where CONFIG_BINFMT_AOUT is not available Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Adrian Bunk authored
... CC [M] drivers/char/ipmi/ipmi_msghandler.o drivers/char/ipmi/ipmi_msghandler.c:3301: `proc_ipmi_root' undeclared here (not in a function) drivers/char/ipmi/ipmi_msghandler.c:3301: initializer element is not constant drivers/char/ipmi/ipmi_msghandler.c:3301: (near initialization for `__ksymtab_proc_ipmi_root.value') drivers/char/ipmi/ipmi_msghandler.c:1535: warning: `ipmb_file_read_proc' defined but not used drivers/char/ipmi/ipmi_msghandler.c:1551: warning: `version_file_read_proc' defined but not used drivers/char/ipmi/ipmi_msghandler.c:1561: warning: `stat_file_read_proc' defined but not used ... CC [M] drivers/char/ipmi/ipmi_poweroff.o drivers/char/ipmi/ipmi_poweroff.c: In function `ipmi_poweroff_init': drivers/char/ipmi/ipmi_poweroff.c:616: warning: implicit declaration of function `unregister_sysctl_table' drivers/char/ipmi/ipmi_poweroff.c:616: `ipmi_table_header' undeclared (first use in this function) drivers/char/ipmi/ipmi_poweroff.c:616: (Each undeclared identifier is reported only once drivers/char/ipmi/ipmi_poweroff.c:616: for each function it appears in.) Signed-off-by:
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Dave Jones authored
Especially useful when users have booted with 'quiet'. In the regular 'oops' path, we set the console_loglevel before we start spewing debug info, but we can call the backtrace code from other places now too, such as the spinlock debugging code. Signed-off-by:
Dave Jones <davej@redhat.com> Signed-off-by:
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Dave Jones authored
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David Howells authored
Add list_for_each_entry_safe_reverse() to linux/list.h This is needed by unmerged cachefs and be an as-yet-unreviewed device_shutdown() fix. Signed-off-by:
David Howells <dhowells@redhat.com> Cc: Patrick Mochel <mochel@digitalimplant.org> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Ben Gardner authored
A simple driver for the CS5535 and CS5536 that allows a user-space program to manipulate GPIO pins. The CS5535/CS5536 chips are Geode processor companion devices. Signed-off-by:
Ben Gardner <bgardner@wabtec.com> Signed-off-by:
Richard Knutsson <ricknu-0@student.ltu.se> Signed-off-by:
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Andrey Borzenkov authored
dev->get_wireless_stats is deprecated but removing it also removes wireless subdirectory in sysfs. This patch puts it back. akpm: I don't know what's happening here. This might be appropriate as a 2.6.15.x compatibility backport. Waiting to hear from Jeff. Signed-off-by:
Andrey Borzenkov <arvidjaar@mail.ru> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: <stable@kernel.org> Signed-off-by:
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Benjamin Herrenschmidt authored
Recent X "nv" driver was fixed for various issues with modern 6xxx and 7xxx cards. This patch ports those fixes to nvidiafb. This makes it work fine on the 6600 bundled with the newest G5 macs. I've verified it still works on the 5200FX of the iMacG5. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by:
"Antonino A. Daplas" <adaplas@pol.net> Signed-off-by:
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Adrian Bunk authored
It seems the "make UID16 support optional" patch was checked when it edited the -tiny tree some time ago, but it wasn't checked whether it still matches the current situation when it was submitted for inclusion in -mm. This patch fixes the following bugs: - ARCH_S390X does no longer exist, nowadays this has to be expressed through (S390 && 64BIT) - in five architecture specific Kconfig files the UID16 options weren't removed Additionally, it changes the fragile negative dependencies of UID16 to positive dependencies (new architectures are more likely to not require UID16 support). Signed-off-by:
Matt Mackall <mpm@selenic.com> Signed-off-by:
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Andrew Morton authored
Not all architectures implement asm/serial.h, and the driver doesn't appear to need it anyway. Cc: Paul Fulghum <paulkf@microgate.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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Andrew Morton authored
Cc: Eric Dumazet <dada1@cosmosbay.com> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
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Linus Torvalds authored
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Linus Torvalds authored
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Oleg Nesterov authored
I think it is better to set ->next_pending in the caller, when it is needed. This saves one parameter, and this coincides with cpu_quiet() beahaviour, which sets ->completed = ->cur itself. Signed-off-by:
Oleg Nesterov <oleg@tv-sign.ru> Acked-by:
Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by:
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- 09 Jan, 2006 12 commits
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Ingo Molnar authored
convert the block loop device from semaphores to completions. Signed-off-by:Ingo Molnar <mingo@elte.hu>
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Aleksey Makarov authored
The patch changes semaphores that are initialized as locked to complete(). Source: MontaVista Software, Inc. Modified-by:
Steven Rostedt <rostedt@goodmis.org> The following patch is from Montavista. I modified it slightly. Semaphores are currently being used where it makes more sense for completions. This patch corrects that. Signed-off-by:
Aleksey Makarov <amakarov@ru.mvista.com> Signed-off-by:
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Steven Rostedt authored
change CPU3WDT semaphores to completions. Signed-off-by: -
Steven Rostedt authored
change SX8 semaphores to completions. Signed-off-by: -
Ingo Molnar authored
This patch converts the superblock-lock semaphore to a mutex, affecting lock_super()/unlock_super(). Tested on ext3 and XFS. Signed-off-by: -
Jes Sorensen authored
This patch converts the inode semaphore to a mutex. I have tested it on XFS and compiled as much as one can consider on an ia64. Anyway your luck with it might be different. Modified-by:
Jes Sorensen <jes@sgi.com> Signed-off-by:
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Jes Sorensen authored
This patch switches XFS over to use the new mutex code directly as opposed to the previous workaround patch I posted earlier that avoided the namespace clash by forcing it back to semaphores. This falls in the 'works for me<tm>' category. Signed-off-by:
Jes Sorensen <jes@trained-monkey.org> Signed-off-by:
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Ingo Molnar authored
more mutex debugging: check for held locks during memory freeing, task exit, enable sysrq printouts, etc. Signed-off-by:
Arjan van de Ven <arjan@infradead.org>
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Ingo Molnar authored
mutex implementation - add debugging code. Signed-off-by:
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Ingo Molnar authored
Add mutex design related documentation. Signed-off-by:
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Ingo Molnar authored
mutex implementation, core files: just the basic subsystem, no users of it. Signed-off-by:
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Arjan van de Ven authored
add the per-arch mutex.h files for the remaining architectures. We default to asm-generic/mutex-dec.h, because that performs quite well on most arches. Arches that do not have atomic decrement/increment instructions should switch to mutex-xchg.h instead. Arches can also provide their own implementation for the mutex fastpath primitives. Signed-off-by:
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