- 12 Jan, 2006 40 commits
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Tejun Heo authored
If ordered tag isn't supported, request ordering for barrier sequencing is performed by queue draining, which basically hangs the request queue until elv_completed_request() reports completion of all previous fs requests. The condition check in elv_completed_request() was only performed for fs requests. If a special request is queued between the last to-be-drained request and the barrier sequence, draining is never completed and the queue is stalled forever. This patch moves the end-of-draining condition check such that it's performed for all requests. Signed-off-by:
Tejun Heo <htejun@gmail.com> Signed-off-by:
Jens Axboe <axboe@suse.de> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Linus Torvalds authored
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Vivek Goyal authored
o This fix was posted for i386 long back. Posting it for x86_64. http://marc.theaimsgroup.com/?l=linux-kernel&m=110380103229830&w=2 o This patch fixes the problem of secondary cpus boot up. This situation is faced when kernel is built for default locations like 16MB and onwards. In this configuration, only primary cpu (BP) comes and secondary cpus don't boot. o Problem occurs because in trampoline code, lgdt is not able to load the GDT as it happens to be situated beyond 16MB. This is due to the fact that cpu is still in real mode and default operand size is 16bit. o This patch uses lgdtl instead of lgdt to force operand size to 32 instead of 16. Signed-off-by:
Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Andi Kleen authored
Handling common prefixes is tricky. Signed-off-by:
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Jan Beulich authored
... reducing the amount of changes Xen has to do. Signed-Off-By:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
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Jan Beulich authored
The explicit and implicit calls to setup_early_printk() were passing inconsistent arguments. Signed-Off-By:
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Andi Kleen authored
It has no business being elsewhere and x86-64 doesn't need/want it. Signed-off-by:
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Andi Kleen authored
Previously they would be only allocated before the kernel text at 1MB. This limited the maximum supported memory to 128GB. Now allow the e820 allocator to put them everywhere. Try to put them beyond any DMA zones to avoid filling them up. This should free some GFP_DMA memory compared to earlier kernels. Signed-off-by:
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Andi Kleen authored
hard_smp_processor_id would return the local APIC id instead of the Linux processor id. On big systems they are often not identical. safe_smp_processor_id is just a wrapper around it that does the necessary conversions. Signed-off-by:
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Andi Kleen authored
Remove support for obsolete hardware and cleanup. - Remove checks for non integrated APICs - Replace apic_write_around with apic_write. - Remove apic_read_around - Remove APIC version reads used by old workarounds - Remove old workaround for Simics - Fix indentation Signed-off-by:
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Jan Beulich authored
When building in a separate objtree, file names produced by BUG() & Co. can get fairly long; printing only the first 50 characters may thus result in (almost) no useful information. The following change makes it so that rather the last 50 characters of the filename get printed. Signed-Off-By:
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Jan Beulich authored
Especially under Xen, where the console cannot be adjusted to more than 25 lines, it is fairly important that the information displayed during a panic is as compact as possible. Below adjustments work towards that. Signed-Off-By:
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Jan Beulich authored
Due to a broken condition, the body of the loop that is intended to wait for the Update-In-Progress bit to get set and then cleared again was never entered; in fact, the entire loop was optimized out by the compiler. Here is a change to fix the condition (and to also move the initialization of locals out of the spin lock protected region). Signed-Off-By:
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Andi Kleen authored
It was only needed for APM Pointed out by Jan Beulich Cc: jbeulich@novell.com Signed-off-by:
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Andi Kleen authored
X86_FEATURE_K8_C was a synthetic Linux CPUID flag that was used for some code optimizations in Opteron C stepping or later. But support for pre C stepping optimizations has been removed, so this isn't needed anymore. Signed-off-by:
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Andi Kleen authored
early_cpu_detect only runs on the BP, but this code needs to run on all CPUs. Looks like a mismerge somewhere. Also add a warning comment. Signed-off-by:
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Stephen Hemminger authored
Fix some trivial sparse warnings in x86_64 code. Signed-off-by:
Stephen Hemminger <shemminger@osdl.org> Signed-off-by:
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Andi Kleen authored
Saves about ~18K .text in defconfig There would be more optimization potential, but that's for later. Suggestion originally from Bill Irwin. Fix from Andy Whitcroft. Signed-off-by:
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Andi Kleen authored
They used to be used by the reboot code, but not anymore. Noticed by Jan Beulich Cc: JBeulich@novell.com Signed-off-by:
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Vivek Goyal authored
o Currently, during kexec reboot, IOAPIC is re-programmed back to virtual wire mode if there was an i8259 connected to it. This enables getting timer interrupts in second kernel in legacy mode. o After putting into virtual wire mode, IOAPIC delivers the i8259 interrupts to CPU0. This works well for kexec but not for kdump as we might crash on a different CPU and second kernel will not see timer interrupts. o This patch modifies the redirection table entry to deliver the timer interrupts to the cpu we are rebooting (instead of hardcoding to zero). This ensures that second kernel receives timer interrupts even on a non-boot cpu. Signed-off-by:
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Ravikiran G Thirumalai authored
Introduce vSMP arch to the kernel. This patch: 1. Adds CONFIG_X86_VSMP 2. Adds machine specific macros for local_irq_disabled, local_irq_enabled and irqs_disabled 3. Writes to the vSMP CTL device to indicate kernel compiled with CONFIG_VSMP Signed-off-by:
Ravikiran Thirumalai <kiran@scalemp.com> Signed-off-by:
Shai Fultheim <shai@scalemp.com> Signed-off-by:
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Ravikiran G Thirumalai authored
vSMP specific alignment patch to 1. Define INTERNODE_CACHE_SHIFT for vSMP 2. Use this for alignment of critical structures 3. Use INTERNODE_CACHE_SHIFT for ARCH_MIN_TASKALIGN, and let the slab align task_struct allocations to the internode cacheline size 4. Introduce and use ARCH_MIN_MMSTRUCT_ALIGN for mm_struct slab allocations. Signed-off-by:
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Andi Kleen authored
Fixes CC fs/nfsctl.o In file included from include2/asm/atomic.h:427, from /home/lsrc/quilt/linux/include/linux/file.h:8, from /home/lsrc/quilt/linux/fs/nfsctl.c:8: /home/lsrc/quilt/linux/include/asm-generic/atomic.h:20:5: warning: "BITS_PER_LONG" is not defined Signed-off-by: -
Brian Gerst authored
Move the #ifdef into the function body. Signed-off-by:
Brian Gerst <bgerst@didntduck.org> Signed-off-by:
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Eric W. Biederman authored
Currently we attempt to restore virtual wire mode on reboot, which only works if we can figure out where the i8259 is connected. This is very useful when we are kexec another kernel and likely helpful to an peculiar BIOS that make assumptions about how the system is setup. Since the acpi MADT table does not provide the location where the i8259 is connected we have to look at the hardware to figure it out. Most systems have the i8259 connected the local apic of the cpu so won't be affected but people running Opteron and some serverworks chipsets should be able to use kexec now. In addition this patch removes the hard coded assumption that the io_apic that delivers isa interrups is always known to the kernel as io_apic 0. There does not appear to be anything to guarantee that assumption is true. And From: Vivek Goyal <vgoyal@in.ibm.com> A minor fix to the patch which remembers the location of where i8259 is connected. Now counter i has been replaced by apic. counter i is having some junk value which was leading to non-detection of i8259 connected to IOAPIC. Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Signed-off-by:
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Chuck Ebbert authored
Setting RF (resume flag) allows a debugger to resume execution after a code breakpoint without tripping the breakpoint again. It is reset by the CPU after executing one instruction. Signed-off-by:
Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by:
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Chuck Ebbert authored
The manual says Int 6 is "invalid opcode", not "invalid operand". Signed-off-by:
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Luiz Fernando Capitulino authored
Fixes the following sparse warnings: arch/x86_64/kernel/mce_amd.c:321:29: warning: Using plain integer as NULL pointer arch/x86_64/kernel/mce_amd.c:410:41: warning: Using plain integer as NULL pointer Signed-off-by:
Luiz Capitulino <lcapitulino@mandriva.com.br> Signed-off-by:
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Andi Kleen authored
It was set as an NMI, but the NMI bit always forces an interrupt to end up at vector 2. So it was never used. Remove. Signed-off-by:
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Jason Uhlenkott authored
It looks like the new scalable TLB flush code for x86_64 is claiming one more IRQ vector than it actually uses. Signed-off-by:
Jason Uhlenkott <jasonuhl@sgi.com> Signed-off-by:
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Andi Kleen authored
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Andi Kleen authored
Fix CC arch/x86_64/kernel/nmi.o linux/arch/x86_64/kernel/nmi.c: In function ???check_nmi_watchdog???: linux/arch/x86_64/kernel/nmi.c:155: warning: statement with no effect on Uniprocessor builds. Signed-off-by:
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Ravikiran G Thirumalai authored
Patch uses a static PDA array early at boot and reallocates processor PDA with node local memory when kmalloc is ready, just before pda_init. The boot_cpu_pda is needed since the cpu_pda is used even before pda_init for that cpu is called (to set the static per-cpu areas offset table etc) Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
Shai Fultheim <shai@scalex86.org> Signed-off-by:
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Ravikiran G Thirumalai authored
Helper patch to change cpu_pda users to use macros to access cpu_pda instead of the cpu_pda[] array. Signed-off-by:
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Ravikiran Thirumalai authored
Patch enables early intialization of cpu_to_node. apicid_to_node is built by reading the SRAT table, from acpi_numa_init with ACPI_NUMA and k8_scan_nodes with K8_NUMA. x86_cpu_to_apicid is built by parsing the ACPI MADT table, from acpi_boot_init. We combine these two tables and setup cpu_to_node. Early intialization helps the static per_cpu_areas in getting pages from correct node. Change since last release: Do not initialize early init_cpu_to_node for faking node cases. Patch tested on TYAN dual core 4P board with K8 only, ACPI_NUMA. Tested on EM64T NUMA. Also tested with numa=off, numa=fake, and running a kernel compiled with NUMA on a regular EM64 2 way SMP. Signed-off-by:
Alok N Kataria <alokk@calsoftinc.com> Signed-off-by:
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Andi Kleen authored
No functional changes. And remove one redundant prototype. Signed-off-by:
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Andi Kleen authored
Replacing the old home brewn __force_inline. Signed-off-by:
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Andi Kleen authored
Passing random input values in eax to cpuid is not a good idea because the CPU will GPF for unknown ones. Use the correct x86-64 version that exists for a longer time too. This also adds a memory barrier to prevent the optimizer from reordering. Cc: tigran@veritas.com Signed-off-by:
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Andi Kleen authored
RDTSC serialization using cpuid is not needed for Intel platforms. This increases gettimeofday performance. Cc: vojtech@suse.cz Cc: rohit.seth@intel.com Signed-off-by:
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Andi Kleen authored
The real vsyscall .text addresses are not mapped when the alternative() replacement runs early, so use some black magic to access them using the direct mapping. Signed-off-by:
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