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* [PATCH] scheduler cache-hot-autodetectakpm@osdl.org2006-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ) From: Ingo Molnar <mingo@elte.hu> This is the latest version of the scheduler cache-hot-auto-tune patch. The first problem was that detection time scaled with O(N^2), which is unacceptable on larger SMP and NUMA systems. To solve this: - I've added a 'domain distance' function, which is used to cache measurement results. Each distance is only measured once. This means that e.g. on NUMA distances of 0, 1 and 2 might be measured, on HT distances 0 and 1, and on SMP distance 0 is measured. The code walks the domain tree to determine the distance, so it automatically follows whatever hierarchy an architecture sets up. This cuts down on the boot time significantly and removes the O(N^2) limit. The only assumption is that migration costs can be expressed as a function of domain distance - this covers the overwhelming majority of existing systems, and is a good guess even for more assymetric systems. [ People hacking systems that have assymetries that break this assumption (e.g. different CPU speeds) should experiment a bit with the cpu_distance() function. Adding a ->migration_distance factor to the domain structure would be one possible solution - but lets first see the problem systems, if they exist at all. Lets not overdesign. ] Another problem was that only a single cache-size was used for measuring the cost of migration, and most architectures didnt set that variable up. Furthermore, a single cache-size does not fit NUMA hierarchies with L3 caches and does not fit HT setups, where different CPUs will often have different 'effective cache sizes'. To solve this problem: - Instead of relying on a single cache-size provided by the platform and sticking to it, the code now auto-detects the 'effective migration cost' between two measured CPUs, via iterating through a wide range of cachesizes. The code searches for the maximum migration cost, which occurs when the working set of the test-workload falls just below the 'effective cache size'. I.e. real-life optimized search is done for the maximum migration cost, between two real CPUs. This, amongst other things, has the positive effect hat if e.g. two CPUs share a L2/L3 cache, a different (and accurate) migration cost will be found than between two CPUs on the same system that dont share any caches. (The reliable measurement of migration costs is tricky - see the source for details.) Furthermore i've added various boot-time options to override/tune migration behavior. Firstly, there's a blanket override for autodetection: migration_cost=1000,2000,3000 will override the depth 0/1/2 values with 1msec/2msec/3msec values. Secondly, there's a global factor that can be used to increase (or decrease) the autodetected values: migration_factor=120 will increase the autodetected values by 20%. This option is useful to tune things in a workload-dependent way - e.g. if a workload is cache-insensitive then CPU utilization can be maximized by specifying migration_factor=0. I've tested the autodetection code quite extensively on x86, on 3 P3/Xeon/2MB, and the autodetected values look pretty good: Dual Celeron (128K L2 cache): --------------------- migration cost matrix (max_cache_size: 131072, cpu: 467 MHz): --------------------- [00] [01] [00]: - 1.7(1) [01]: 1.7(1) - --------------------- cacheflush times [2]: 0.0 (0) 1.7 (1784008) --------------------- Here the slow memory subsystem dominates system performance, and even though caches are small, the migration cost is 1.7 msecs. Dual HT P4 (512K L2 cache): --------------------- migration cost matrix (max_cache_size: 524288, cpu: 2379 MHz): --------------------- [00] [01] [02] [03] [00]: - 0.4(1) 0.0(0) 0.4(1) [01]: 0.4(1) - 0.4(1) 0.0(0) [02]: 0.0(0) 0.4(1) - 0.4(1) [03]: 0.4(1) 0.0(0) 0.4(1) - --------------------- cacheflush times [2]: 0.0 (33900) 0.4 (448514) --------------------- Here it can be seen that there is no migration cost between two HT siblings (CPU#0/2 and CPU#1/3 are separate physical CPUs). A fast memory system makes inter-physical-CPU migration pretty cheap: 0.4 msecs. 8-way P3/Xeon [2MB L2 cache]: --------------------- migration cost matrix (max_cache_size: 2097152, cpu: 700 MHz): --------------------- [00] [01] [02] [03] [04] [05] [06] [07] [00]: - 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) [01]: 19.2(1) - 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) [02]: 19.2(1) 19.2(1) - 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) [03]: 19.2(1) 19.2(1) 19.2(1) - 19.2(1) 19.2(1) 19.2(1) 19.2(1) [04]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) - 19.2(1) 19.2(1) 19.2(1) [05]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) - 19.2(1) 19.2(1) [06]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) - 19.2(1) [07]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) - --------------------- cacheflush times [2]: 0.0 (0) 19.2 (19281756) --------------------- This one has huge caches and a relatively slow memory subsystem - so the migration cost is 19 msecs. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Cc: <wilder@us.ibm.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sched: add cacheflush() asmIngo Molnar2006-01-12
| | | | | | | | | | Add per-arch sched_cacheflush() which is a write-back cacheflush used by the migration-cost calibration code at bootup time. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Implement ioctl emulation for the parport character deviceAndi Kleen2006-01-12
| | | | | | | | | | Fixes bugzilla.kernel.org bug 2903. Cc: <tim@cyberelk.net> Cc: <andrea@suse.de> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] memmap_init_zone(): remove uneccesary page++Greg Ungerer2006-01-12
| | | | | | | | Remove unecessary page++ from memmap_init_zone loop. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] md: remove slashes from disk names when creation dev names in sysfsNeil Brown2006-01-12
| | | | | | | | | | | | | | | e.g. The sx8 driver uses names like sx8/0. This would make a md component dev name like /sys/block/md0/md/dev-sx8/0 which is not allowed. So we change the '/' to '!' just like fs/partitions/check.c(register_disk) does. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] do_truncate() call fix in tiny-shmem.cCatalin Marinas2006-01-12
| | | | | | | | | | Adapt tiny-shmem.c to the new do_truncate() prototype. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Matt Mackall <mpm@selenic.com> Acked-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] migration: make sure there is no attempt to migrate reserved pages.Christoph Lameter2006-01-12
| | | | | | | | | This ensures that reserved pages are not migrated. Reserved pages currently cause the WARN_ON to trigger in migrate_page_add() Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fix queue stalling while barrier sequencingTejun Heo2006-01-12
| | | | | | | | | | | | | | | | | | | 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>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvbLinus Torvalds2006-01-11
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| * V4L/DVB (3354): VIDEO_SAA7134_ALSA shouldn't select SND_PCM_OSSAdrian Bunk2006-01-11
| | | | | | | | | | | | | | | | - There's no reason for an ALSA driver to select an OSS legacy userspace interface. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3352): Some fixes to compat_ioctl32Guy Martin2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Adds suppport or fix support for VIDIOC_ENUMSTD, VIDIOC_ENUMINPUT, VIDIOC_G_TUNER and VIDIOC_S_TUNER. - Fix the warnings at compile time and add checks for the pointer validity using access_ok(). - v4l_print_ioctl() has also be added to identify possible missing ioctls. - Has been tested on sparc64 and amd64. Other arches such as mips and hppa are expected to work as sparc, but not tested yet. Signed-off-by: Guy Martin <gmsoft@tuxicoman.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3351): adding support for knc1 Tv Star dvb-sRegis Prevot2006-01-11
| | | | | | | | | | | | | | | | - Added knc1 tv star dvb-s support with philips tuner sd1878. Signed-off-by: Regis Prevot <regis.prevot@anevia.com> Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3350): Added USB ID for DigitalNow DVB-T Dual USB, DViCO cloneMichael Krufky2006-01-11
| | | | | | | | | | | | | | | | - Added USB ID for DigitalNow DVB-T Dual USB, DViCO FusionHDTV DVB-T Dual USB clone Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3349): Add PCI ID for UltraView DVB-T Plus, rebranded DViCO ↵Michael Krufky2006-01-11
| | | | | | | | | | | | | | | | | | FusionHDTV DVB-T Plus - Add PCI ID for UltraView DVB-T Plus,rebranded DViCO FusionHDTV DVB-T Plus Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3348): debug renamed to cx25840_debugHans Verkuil2006-01-11
| | | | | | | | | | | | | | | | - Debug var renamed to cx25840 to avoid conflicts with other var with the same name at kernel Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3347): Fixes some bad global variablesHans Verkuil2006-01-11
| | | | | | | | | | | | | | | | - Debug global var is already used inside kernel, so renamed debug to tuner_debug for the tuner module Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3345): Fixes some bad global variablesMauro Carvalho Chehab2006-01-11
| | | | | | | | | | | | | | | | | | - Debug global var is already used inside kernel. - v4l_dbg now expects the debug var - global vars inside msp34xx renamed to msp_* Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3344f): Stradis Kconfig url changedJiri Slaby2006-01-11
| | | | | | | | | | | | | | | | http://www.stradis.com/decoder.html returns `No input file specified.' Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3344e): Stradis LindentJiri Slaby2006-01-11
| | | | | | | | | | | | | | | | Stradis Lindent + some handwork Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3344d): Stradis video little cleanupJiri Slaby2006-01-11
| | | | | | | | | | | | | | | | | | | | Unused function removed. Used container_of instead of for loop. Some small changes Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3344c): Pci probing for stradis driverJiri Slaby2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | - Pci probing functions added, some functions were rewritten. - Use PCI_DEVICE macro. - dev_ used for printing when pci_dev available. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3344b): don't ignore return from i2c_add_driver() for tuner-3036Arthur Othieno2006-01-11
| | | | | | | | | | | | | | | | | | | | | | The call to i2c_add_driver() may actually fail, but tuner-3036 ignores this and always returns 0, regardless. Fix it up so it returns what i2c_add_driver() does, instead. Signed-off-by: Arthur Othieno <a.othieno@bluewin.ch> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3344a): Conversions from kmalloc+memset to k(z|c)allocPanagiotis Issaris2006-01-11
| | | | | | | | | | | | | | | | Conversions from kmalloc+memset to k(z|c)alloc. Signed-off-by: Panagiotis Issaris <takis@issaris.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3344): Enable microtune for Pinnacle 300i boardsRicardo Cerqueira2006-01-11
| | | | | | | | | | | | | | | | - The Pinnacle 300i (like the PCTV Stereo) needs tda9887 port2 set to 1 for the tuner to work Signed-off-by: Ricardo Cerqueira <v4l@cerqueira.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3343): Add support for DViCO FusionHDTV DVB-T USB devicesMichael Krufky2006-01-11
| | | | | | | | | | | | | | | | - Add support for DViCO FusionHDTV DVB-T USB devices (Thomson dtt7579 and LG z201 based) Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3342): More whitespace cleanup in bttv-cards.cMichael Krufky2006-01-11
| | | | | | | | | | | | | | - More whitespace cleanup in bttv-cards.c Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3341): whitespace cleanup: insert missing space before curly bracketsMichael Krufky2006-01-11
| | | | | | | | | | | | | | - whitespace cleanup: insert missing space before curly brackets Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3340): Add bttv card MagicTV (rebranded MachTV)Julian Calaby2006-01-11
| | | | | | | | | | | | | | | | - Add bttv card MagicTV (rebranded MachTV) Signed-off-by: Julian Calaby <julian.calaby@gmail.com> Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (3339): Activate remote control on HVR1100Chris Pascoe2006-01-11
| | | | | | | | | | | | | | | | - Add a missing case which was preventing the operation of the HVR1100 remote. Signed-off-by: Chris Pascoe <c.pascoe@itee.uq.edu.au> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* | [PATCH] x86_64: Fix SMP bootup with CONFIG_KDUMP enabledVivek Goyal2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Don't confuse noapic with noapictimerAndi Kleen2006-01-11
| | | | | | | | | | | | | | Handling common prefixes is tricky. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: don't copy command line twiceJan Beulich2006-01-11
| | | | | | | | | | | | | | | | | | ... reducing the amount of changes Xen has to do. Signed-Off-By: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] i386/x86-64: make setup_early_printk() usage consistentJan Beulich2006-01-11
| | | | | | | | | | | | | | | | | | | | The explicit and implicit calls to setup_early_printk() were passing inconsistent arguments. Signed-Off-By: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] i386: Move DOUBLEFAULT config to arch/i386/KconfigAndi Kleen2006-01-11
| | | | | | | | | | | | | | It has no business being elsewhere and x86-64 doesn't need/want it. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Allow kernel page tables upto the end of memoryAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | | | | | 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: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Use safe_smp_processor_id in MCE handlerAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | | | 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: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Some housekeeping in local APIC codeAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Display meaningful part of filename during BUG()Jan Beulich2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | 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: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Reduce screen space needed by stack traceJan Beulich2006-01-11
| | | | | | | | | | | | | | | | | | | | | | 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: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Fix get_cmos_time()Jan Beulich2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | 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: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: No need to export get_cmos_time anymoreAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | | | | | It was only needed for APM Pointed out by Jan Beulich Cc: jbeulich@novell.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Remove unused AMD K8 C stepping flagAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | 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: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] i386: Move phys_proc_id/early intel workaround to correct function.Andi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | | | 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: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: sparse warning cleanupsStephen Hemminger2006-01-11
| | | | | | | | | | | | | | | | Fix some trivial sparse warnings in x86_64 code. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Move NUMA page_to_pfn/pfn_to_page functions out of lineAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | 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: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Remove unused segmentsAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | | | | | They used to be used by the reboot code, but not anymore. Noticed by Jan Beulich Cc: JBeulich@novell.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: ioapic virtual wire mode fixVivek Goyal2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Inclusion of ScaleMP vSMP architecture patches - vsmp_archRavikiran G Thirumalai2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Inclusion of ScaleMP vSMP architecture patches - vsmp_alignRavikiran G Thirumalai2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Ravikiran Thirumalai <kiran@scalemp.com> Signed-off-by: Shai Fultheim <shai@scalemp.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] x86_64: Make sure BITS_PER_ATOMIC is defined in asm-generic/atomic.hAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | 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: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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