aboutsummaryrefslogtreecommitdiffstats
path: root/arch
Commit message (Collapse)AuthorAge
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-lguestLinus Torvalds2009-06-12
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-lguest: (31 commits) lguest: add support for indirect ring entries lguest: suppress notifications in example Launcher lguest: try to batch interrupts on network receive lguest: avoid sending interrupts to Guest when no activity occurs. lguest: implement deferred interrupts in example Launcher lguest: remove obsolete LHREQ_BREAK call lguest: have example Launcher service all devices in separate threads lguest: use eventfds for device notification eventfd: export eventfd_signal and eventfd_fget for lguest lguest: allow any process to send interrupts lguest: PAE fixes lguest: PAE support lguest: Add support for kvm_hypercall4() lguest: replace hypercall name LHCALL_SET_PMD with LHCALL_SET_PGD lguest: use native_set_* macros, which properly handle 64-bit entries when PAE is activated lguest: map switcher with executable page table entries lguest: fix writev returning short on console output lguest: clean up length-used value in example launcher lguest: Segment selectors are 16-bit long. Fix lg_cpu.ss1 definition. lguest: beyond ARRAY_SIZE of cpu->arch.gdt ...
| * lguest: PAE supportMatias Zabaljauregui2009-06-12
| | | | | | | | | | | | | | | | This version requires that host and guest have the same PAE status. NX cap is not offered to the guest, yet. Signed-off-by: Matias Zabaljauregui <zabaljauregui@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * lguest: Add support for kvm_hypercall4()Matias Zabaljauregui2009-06-12
| | | | | | | | | | | | | | Add support for kvm_hypercall4(); PAE wants it. Signed-off-by: Matias Zabaljauregui <zabaljauregui at gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * lguest: replace hypercall name LHCALL_SET_PMD with LHCALL_SET_PGDMatias Zabaljauregui2009-06-12
| | | | | | | | | | | | | | | | | | replace LHCALL_SET_PMD with LHCALL_SET_PGD hypercall name (That's really what it is, and the confusion gets worse with PAE support) Signed-off-by: Matias Zabaljauregui <zabaljauregui@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Reported-by: Jeremy Fitzhardinge <jeremy@goop.org>
| * lguest: use native_set_* macros, which properly handle 64-bit entries when ↵Matias Zabaljauregui2009-06-12
| | | | | | | | | | | | | | | | | | PAE is activated Some cleanups and replace direct assignment with native_set_* macros which properly handle 64-bit entries when PAE is activated Signed-off-by: Matias Zabaljauregui <zabaljauregui@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * lguest: optimize by coding restore_flags and irq_enable in assembler.Rusty Russell2009-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The downside of the last patch which made restore_flags and irq_enable check interrupts is that they are now too big to be patched directly into the callsites, so the C versions are always used. But the C versions go via PV_CALLEE_SAVE_REGS_THUNK which saves all the registers. In fact, we don't need any registers in the fast path, so we can do better than this if we actually code them in assembler. The results are in the noise, but since it's about the same amount of code, it's worth applying. 1GB Guest->Host: input(suppressed),output(suppressed) Before: Seconds: 0:16.53 Packets: 377268,753673 Interrupts: 22461,24297 Notifications: 1(5245),21303(732370) Net IRQs triggered: 377023(245),42578(711095) After: Seconds: 0:16.48 Packets: 377289,753673 Interrupts: 22281,24465 Notifications: 1(5245),21296(732377) Net IRQs triggered: 377060(229),42564(711109) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * lguest: improve interrupt handling, speed up stream networkingRusty Russell2009-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | lguest never checked for pending interrupts when enabling interrupts, and things still worked. However, it makes a significant difference to TCP performance, so it's time we fixed it by introducing a pending_irq flag and checking it on irq_restore and irq_enable. These two routines are now too big to patch into the 8/10 bytes patch space, so we drop that code. Note: The high latency on interrupt delivery had a very curious effect: once everything else was optimized, networking without GSO was faster than networking with GSO, since more interrupts were sent and hence a greater chance of one getting through to the Guest! Note2: (Almost) Closing the same loophole for iret doesn't have any measurable effect, so I'm leaving that patch for the moment. Before: 1GB tcpblast Guest->Host: 30.7 seconds 1GB tcpblast Guest->Host (no GSO): 76.0 seconds After: 1GB tcpblast Guest->Host: 6.8 seconds 1GB tcpblast Guest->Host (no GSO): 27.8 seconds Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * lguest: clean up lguest_init_IRQRusty Russell2009-06-12
| | | | | | | | | | | | | | Copy from arch/x86/kernel/irqinit_32.c: we don't use the vectors beyond LGUEST_IRQS (if any), but we might as well set them all. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | Merge ↵Linus Torvalds2009-06-12
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-module-and-param * git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-module-and-param: module: cleanup FIXME comments about trimming exception table entries. module: trim exception table on init free. module: merge module_alloc() finally uml module: fix uml build process due to this merge x86 module: merge the rest functions with macros x86 module: merge the same functions in module_32.c and module_64.c uvesafb: improve parameter handling. module_param: allow 'bool' module_params to be bool, not just int. module_param: add __same_type convenience wrapper for __builtin_types_compatible_p module_param: split perm field into flags and perm module_param: invbool should take a 'bool', not an 'int' cyber2000fb.c: use proper method for stopping unload if CONFIG_ARCH_SHARK
| * | module: cleanup FIXME comments about trimming exception table entries.Rusty Russell2009-06-12
| | | | | | | | | | | | | | | | | | | | | | | | Everyone cut and paste this comment from my original one. We now do it generically, so cut the comments. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Amerigo Wang <amwang@redhat.com>
| * | module: trim exception table on init free.Rusty Russell2009-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's theoretically possible that there are exception table entries which point into the (freed) init text of modules. These could cause future problems if other modules get loaded into that memory and cause an exception as we'd see the wrong fixup. The only case I know of is kvm-intel.ko (when CONFIG_CC_OPTIMIZE_FOR_SIZE=n). Amerigo fixed this long-standing FIXME in the x86 version, but this patch is more general. This implements trim_init_extable(); most archs are simple since they use the standard lib/extable.c sort code. Alpha and IA64 use relative addresses in their fixups, so thier trimming is a slight variation. Sparc32 is unique; it doesn't seem to define ARCH_HAS_SORT_EXTABLE, yet it defines its own sort_extable() which overrides the one in lib. It doesn't sort, so we have to mark deleted entries instead of actually trimming them. Inspired-by: Amerigo Wang <amwang@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: linux-alpha@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: linux-ia64@vger.kernel.org
| * | module: merge module_alloc() finallyAmerigo Wang2009-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As Christoph Hellwig suggested, module_alloc() actually can be unified for i386 and x86_64 (of course, also UML). Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: 'Ingo Molnar' <mingo@elte.hu> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * | uml module: fix uml build process due to this mergeAmerigo Wang2009-06-12
| | | | | | | | | | | | | | | | | | | | | | | | Due to the previous merge, uml needs to be fixed. Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * | x86 module: merge the rest functions with macrosAmerigo Wang2009-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | Merge the rest functions together, with proper preprocessing directives. Finally remove module_{32|64}.c. Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * | x86 module: merge the same functions in module_32.c and module_64.cAmerigo Wang2009-06-12
| |/ | | | | | | | | | | | | | | | | | | | | Merge the same functions both in module_32.c and module_64.c into module.c. This is the first step to merge both of them finally. Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2009-06-12
|\ \ | |/ |/| | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Provide _sdata in the vmlinux.lds.S file x86: handle initrd that extends into unusable memory
| * x86: Provide _sdata in the vmlinux.lds.S fileCatalin Marinas2009-06-12
| | | | | | | | | | | | | | | | | | | | | | | | _sdata is a common symbol defined by many architectures and made available to the kernel via asm-generic/sections.h. Kmemleak uses this symbol when scanning the data sections. [ Impact: add new global symbol ] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> LKML-Reference: <20090511122105.26556.96593.stgit@pc1117.cambridge.arm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: handle initrd that extends into unusable memoryYinghai Lu2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | On a system where system memory (according e820) is not covered by mtrr, mtrr_trim_memory converts a portion of memory to reserved, but bootloader has already put the initrd in that range. Thus, we need to have 64bit to use relocate_initrd too. [ Impact: fix using initrd when mtrr_trim_memory happen ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: stable@kernel.org
* | Merge branch 'for-linus' of ↵Linus Torvalds2009-06-11
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (87 commits) nilfs2: get rid of bd_mount_sem use from nilfs nilfs2: correct exclusion control in nilfs_remount function nilfs2: simplify remaining sget() use nilfs2: get rid of sget use for checking if current mount is present nilfs2: get rid of sget use for acquiring nilfs object nilfs2: remove meaningless EBUSY case from nilfs_get_sb function remove the call to ->write_super in __sync_filesystem nilfs2: call nilfs2_write_super from nilfs2_sync_fs jffs2: call jffs2_write_super from jffs2_sync_fs ufs: add ->sync_fs sysv: add ->sync_fs hfsplus: add ->sync_fs hfs: add ->sync_fs fat: add ->sync_fs ext2: add ->sync_fs exofs: add ->sync_fs bfs: add ->sync_fs affs: add ->sync_fs sanitize ->fsync() for affs repair bfs_write_inode(), switch bfs to simple_fsync() ...
| * | Push BKL into do_mount()Al Viro2009-06-11
| |/ | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'for-linus' of ↵Linus Torvalds2009-06-11
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68knommu: remove unecessary include of thread_info.h in entry.S m68knommu: enumerate INIT_THREAD fields properly headers_check fix: m68k, swab.h arch/m68knommu: Convert #ifdef DEBUG printk(KERN_DEBUG to pr_debug( m68knommu: remove obsolete reset code m68knommu: move CPU reset code for the 5272 ColdFire into its platform code m68knommu: move CPU reset code for the 528x ColdFire into its platform code m68knommu: move CPU reset code for the 527x ColdFire into its platform code m68knommu: move CPU reset code for the 523x ColdFire into its platform code m68knommu: move CPU reset code for the 520x ColdFire into its platform code m68knommu: add CPU reset code for the 532x ColdFire m68knommu: add CPU reset code for the 5249 ColdFire m68knommu: add CPU reset code for the 5206e ColdFire m68knommu: add CPU reset code for the 5206 ColdFire m68knommu: add CPU reset code for the 5407 ColdFire m68knommu: add CPU reset code for the 5307 ColdFire m68knommu: merge system reset for code ColdFire 523x family m68knommu: fix system reset for ColdFire 527x family
| * | m68knommu: remove unecessary include of thread_info.h in entry.SGreg Ungerer2009-06-11
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: enumerate INIT_THREAD fields properlyGreg Ungerer2009-06-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use proper field value setting init INIT_THREAD macro. Fixes this: arch/m68knommu/kernel/init_task.c:27: warning: excess elements in array initializer arch/m68knommu/kernel/init_task.c:27: warning: (near initialization for ‘init_task.thread.fpstate’) Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | headers_check fix: m68k, swab.hJaswinder Singh Rajput2009-06-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fix the following 'make headers_check' warnings: usr/include/asm-m68k/swab.h:4: include of <linux/types.h> is preferred over <asm/types.h> usr/include/asm-m68k/swab.h:10: found __[us]{8,16,32,64} type without #include <linux/types.h> Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | arch/m68knommu: Convert #ifdef DEBUG printk(KERN_DEBUG to pr_debug(Joe Perches2009-06-10
| | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: remove obsolete reset codeGreg Ungerer2009-06-10
| | | | | | | | | | | | | | | | | | | | | All ColdFire and non-MMU 68k code has custom reset routines. Remove the obsolete and now un-used reset macros. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: move CPU reset code for the 5272 ColdFire into its platform codeGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: move CPU reset code for the 528x ColdFire into its platform codeGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: move CPU reset code for the 527x ColdFire into its platform codeGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: move CPU reset code for the 523x ColdFire into its platform codeGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: move CPU reset code for the 520x ColdFire into its platform codeGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: add CPU reset code for the 532x ColdFireGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: add CPU reset code for the 5249 ColdFireGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: add CPU reset code for the 5206e ColdFireGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: add CPU reset code for the 5206 ColdFireGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: add CPU reset code for the 5407 ColdFireGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: add CPU reset code for the 5307 ColdFireGreg Ungerer2009-06-10
| | | | | | | | | | | | Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: merge system reset for code ColdFire 523x familyGreg Ungerer2009-06-10
| | | | | | | | | | | | | | | | | | | | | | | | The sofwtare reset control code for the 523x ColdFire family uses the same Reset unit hardware as the 527x and 528x ColdFire parts. So they should all use the same code. Merge them. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: fix system reset for ColdFire 527x familyGreg Ungerer2009-06-10
| | | | | | | | | | | | | | | | | | | | | | | | The sofwtare reset control for the 527x ColdFire family is based on the same Reset Control Unit as the 528x ColdFire family. So use the same reset code for both. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
* | | x86: use zalloc_cpumask_var in arch_early_irq_initYinghai Lu2009-06-11
| | | | | | | | | | | | | | | | | | | | | So we make sure MAXSMP gets a cleared cpumask Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | perfcounters: remove powerpc definitions of perf_counter_do_pendingStephen Rothwell2009-06-11
| |/ |/| | | | | | | | | | | | | | | | | Commit 925d519ab82b6dd7aca9420d809ee83819c08db2 ("perf_counter: unify and fix delayed counter wakeup") added global definitions. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Paul Mackerras <paulus@samba.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'perfcounters-for-linus' of ↵Linus Torvalds2009-06-11
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (574 commits) perf_counter: Turn off by default perf_counter: Add counter->id to the throttle event perf_counter: Better align code perf_counter: Rename L2 to LL cache perf_counter: Standardize event names perf_counter: Rename enums perf_counter tools: Clean up u64 usage perf_counter: Rename perf_counter_limit sysctl perf_counter: More paranoia settings perf_counter: powerpc: Implement generalized cache events for POWER processors perf_counters: powerpc: Add support for POWER7 processors perf_counter: Accurate period data perf_counter: Introduce struct for sample data perf_counter tools: Normalize data using per sample period data perf_counter: Annotate exit ctx recursion perf_counter tools: Propagate signals properly perf_counter tools: Small frequency related fixes perf_counter: More aggressive frequency adjustment perf_counter/x86: Fix the model number of Intel Core2 processors perf_counter, x86: Correct some event and umask values for Intel processors ...
| * \ Merge branch 'linus' into perfcounters/coreIngo Molnar2009-06-11
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/irqinit.c arch/x86/kernel/irqinit_64.c arch/x86/kernel/traps.c arch/x86/mm/fault.c include/linux/sched.h kernel/exit.c
| * | | perf_counter: Rename L2 to LL cachePeter Zijlstra2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The top (fastest) and last level (biggest) caches are the most interesting ones, performance wise. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> [ Fixed the Nehalem LL table to LLC Reference/Miss events ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf_counter: Standardize event namesPeter Zijlstra2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pure renames only, to PERF_COUNT_HW_* and PERF_COUNT_SW_*. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf_counter: powerpc: Implement generalized cache events for POWER processorsPaul Mackerras2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds tables of event codes for the generalized cache events for all the currently supported powerpc processors: POWER{4,5,5+,6,7} and PPC970*, plus powerpc-specific code to use these tables when a generalized cache event is requested. Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <18992.36430.933526.742969@drongo.ozlabs.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf_counters: powerpc: Add support for POWER7 processorsPaul Mackerras2009-06-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the back-end for the PMU on POWER7 processors. POWER7 has 4 fully-programmable counters and two fixed-function counters (which do respect the freeze conditions, can generate interrupts, and are writable, unlike PMC5/6 on POWER5+/6). Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <18992.36329.189378.17992@drongo.ozlabs.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf_counter: Accurate period dataPeter Zijlstra2009-06-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We currently log hw.sample_period for PERF_SAMPLE_PERIOD, however this is incorrect. When we adjust the period, it will only take effect the next cycle but report it for the current cycle. So when we adjust the period for every cycle, we're always wrong. Solve this by keeping track of the last_period. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf_counter: Introduce struct for sample dataPeter Zijlstra2009-06-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For easy extension of the sample data, put it in a structure. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf_counter: More aggressive frequency adjustmentPeter Zijlstra2009-06-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also employ the overflow handler to adjust the frequency, this results in a stable frequency in about 40~50 samples, instead of that many ticks. This also means we can start sampling at a sample period of 1 without running head-first into the throttle. It relies on sched_clock() to accurately measure the time difference between the overflow NMIs. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-15 13:33:45 -0500