- 17 May, 2005 40 commits
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Zhang, Yanmin authored
On my IA64 machine, after kernel 2.6.12-rc3 boots, an edge-triggered interrupt (IRQ 46) keeps triggered over and over again. There is no IRQ 46 interrupt action handler. It has lots of impact on performance. Kernel 2.6.10 and its prior versions have no the problem. Basically, kernel 2.6.10 will mask the spurious edge interrupt if the interrupt is triggered for the second time and its status includes IRQ_DISABLE|IRQ_PENDING. Originally, IA64 kernel has its own specific _irq_desc definitions in file arch/ia64/kernel/irq.c. The definition initiates _irq_desc[irq].status to IRQ_DISABLE. Since kernel 2.6.11, it was moved to architecture independent codes, i.e. kernel/irq/handle.c, but kernel/irq/handle.c initiates _irq_desc[irq].status to 0 instead of IRQ_DISABLE. Signed-off-by:
Zhang Yanmin <yanmin.zhang@intel.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Peter Osterlund authored
I found a bug in the packet writing driver that could cause data corruption. The problem arised if the driver got a write request for a sector in a "zone" it was already working on. In that case it was supposed to queue the write request until it was done processing earlier requests for the same zone, and instead work on some other zone in the mean time. However, if there was no other zone to work on, the driver would initiate two packet_data objects for the same zone, causing unpredictable things to happen. Signed-off-by:
Peter Osterlund <petero2@telia.com> Signed-off-by:
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Patrick McHardy authored
null_encrypt() needs to copy the data in case src and dst are disjunct, null_compress() needs to copy the data in any case as far as I can tell. I joined compress/decompress and encrypt/decrypt to avoid duplicating code. Without this patch ESP null_enc packets look like this: IP (tos 0x0, ttl 64, id 23130, offset 0, flags [DF], length: 128) 10.0.0.1 > 10.0.0.2: ESP(spi=0x0f9ca149,seq=0x4) 0x0000: 4500 0080 5a5a 4000 4032 cbef 0a00 0001 E...ZZ@.@2...... 0x0010: 0a00 0002 0f9c a149 0000 0004 0000 0000 .......I........ 0x0020: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0030: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0040: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0050: 0000 .. IP (tos 0x0, ttl 64, id 256, offset 0, flags [DF], length: 128) 10.0.0.2 > 10.0.0.1: ESP(spi=0x0e4f7b51,seq=0x2) 0x0000: 4500 0080 0100 4000 4032 254a 0a00 0002 E.....@.@2%J.... 0x0010: 0a00 0001 0e4f 7b51 0000 0002 a8a8 a8a8 .....O{Q........ 0x0020: a8a8 a8a8 a8a8 a8a8 a8a8 a8a8 a8a8 a8a8 ................ 0x0030: a8a8 a8a8 a8a8 a8a8 a8a8 a8a8 a8a8 a8a8 ................ 0x0040: a8a8 a8a8 a8a8 a8a8 a8a8 a8a8 a8a8 a8a8 ................ 0x0050: a8a8 .. Signed-off-by:Patrick McHardy <kaber@trash.net> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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McMullan, Jason authored
Fix OOPS when swapping on a device that doesn't have an unplug_io_fn defined (eg, ATA Over Ethernet) Signed-off-by:
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Horst Hummel authored
dasd driver changes: - The feature check in dasd_generic_online returns an error if the devmap entry for the device is not yet available. Check for the feature after the device has been created. - Do symmetric registration/deregistration of cdev->handler. Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Adrian Bunk authored
This patch fixes two possible off by one errors found by the Coverity checker (look at the period[i] and delay[j] in the two first unchanged lines). Signed-off-by:
Adrian Bunk <bunk@stusta.de> Cc: Vojtech Pavlik <vojtech@suse.cz> Cc: Dmitry Torokhov <dtor_core@ameritech.net> Signed-off-by:
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Adrian Bunk authored
Linus changed the second argument of __vmalloc from int to unsigned int breaking the compilation for CONFIG_MMU=n configurations (since he only changed vmalloc.c but not nommu.c). Signed-off-by:
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Andi Kleen authored
Update defconfig Signed-off-by:
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Andi Kleen authored
This patch removes the assumption that LAPIC entries contain the BSP as its first entry. This is a slight improvement to the temporary fix submitted by Suresh Siddha. - Removes assumption that LAPIC entries contain BSP first. - Builds x86_acpiid_to_apicid[] and bios_cpu_apicid[] properly with BSP as first entry. - Made maxcpus=1 boot on these systems. Since the parsing earlier in arch/x86_64/kernel/mpparse.c stopped after maxcpus entries, other entries were not processed, this causes kernel not to boot on these systems. TBD: x86_acpiid_to_apicid and bios_cpu_apicid[] seem to be exactly the same. This could be removed, but might need more work to cleanup. Signed-off-by:Ashok Raj <ashok.raj@intel.com> Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Andi Kleen authored
Collected NMI watchdog fixes. - Fix call of check_nmi_watchdog - Remove earlier move of check_nmi_watchdog to later. It does not fix the race it was supposed to fix fully. - Remove unused P6 definitions - Add support for performance counter based watchdog on P4 systems. This allows to run it only once per second, which saves some CPU time. Previously it would run at 1000Hz, which was too much. Code ported from i386 Make this the default on Intel systems. - Use check_nmi_watchdog with local APIC based nmi - Fix race in touch_nmi_watchdog - Fix bug that caused incorrect performance counters to be programmed in a few cases on K8. - Remove useless check for local APIC - Use local_t and per_cpu variables for per CPU data. - Keep other CPUs busy during check_nmi_watchdog to make sure they really tick when in lapic mode. - Only check CPUs that are actually online. - Various other fixes. - Fix fallback path when MSRs are unimplemented Signed-off-by:
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Andi Kleen authored
Originally from Matt Tolentino Signed-off-by:
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Suresh Siddha authored
Use bitmap_zero instead of bitmap_empty to initialise cpu mask This makes it actually run reliable instead of relying on stack state. Signed-off-by:
Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by:
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Andi Kleen authored
The PTEs can point to ioremap mappings too, and these are often outside mem_map. The NUMA hash page lookup functions cannot handle out of bounds accesses properly. Signed-off-by:
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Andi Kleen authored
Allowed user programs to set a non canonical segment base, which would cause oopses in the kernel later. Credit-to: Alexander Nyberg <alexn@dsv.su.se> For identifying and reporting this bug. Signed-off-by:
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Andi Kleen authored
This works around an AMD Erratum. Signed-off-by:
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Andi Kleen authored
There are unfortunately more and more multi processor Opteron systems which don't have HPET timer support in the southbridge. This covers in particular Nvidia and VIA chipsets. They also don't guarantee that the TSCs are synchronized between CPUs; and especially with MP powernow the systems are nearly unusable because the time gets very inconsistent between CPUs. The timer code for x86-64 was originally written under the assumption that we could fall back to the HPET timer on such systems. But this doesn't work there. Another alternative is to use the ACPI PM timer as primary time source. This patch does that. The kernel only uses PM timer when there is no other choice because it has some disadvantages. Ported over from i386. It should be faster than the i386 version because I dropped the "read three times" workaround, but is still considerable slower than HPET and also does not work together with vsyscalls which have to be disabled. Cc: <mark.langsdorf@amd.com> Signed-off-by:
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Andi Kleen authored
It is unnecessary on modern Intel or AMD systems, and that is all we support on x86-64 Also causes problems on various systems Signed-off-by:
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Andi Kleen authored
It is not very useful to the user and more an kernel internal implementation detail. So hide it. Signed-off-by:
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Andi Kleen authored
Remove x86_apicid field Signed-off-by:
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Andi Kleen authored
The new TSC sync algorithm recently submitted did not work too well. The result was that some MP machines where the TSC came up of the BIOS very unsynchronized and that did not have HPET support were nearly unusable because the time would jump forwards and backwards between CPUs. After a lot of research ;-) and some more prototypes I ended up with just using the one from IA64 which looks best. It has some internal self tuning that should adapt to changing interconnect latencies. It holds up in my tests so far. I believe it was originally written by David Mosberger, I just ported it over to x86-64. See the inline comment for a description. This cleans up the code because it uses smp_call_function for syncing instead of having custom hooks in SMP bootup. Please note that the cycle numbers it outputs are too optimistic because they do not take into account the latency of WRMSR and RDTSC, which can be hundreds of cycles. It seems to be able to sync a dual Opteron to 200-300 cycles, which is probably good enough. There is a timing window during AP bootup where interrupts can see inconsistent time before the TSC is synced. It is hard to avoid unfortunately because we can only do the TSC sync after some setup, and we need to enable interrupts before that. I just ignored it for now. Signed-off-by:
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Andi Kleen authored
It could be in a memory hole not mapped in mem_map and that causes the hash lookup to go off to nirvana. Signed-off-by:
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Andi Kleen authored
Needed by big systems and only costs a few K of memory. Signed-off-by:
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Andi Kleen authored
Last round hopefully of cpu_core_id changes hopefully fow now: - Always initialize cpu_core_id for all CPUs, even when no dual core setup is detected. This prevents funny /proc/cpuinfo output - Do the same with phys_proc_id[] even when no HyperThreading - dito. - Use the CPU APIC-ID from CPUID 1 instead of the linux virtual CPU number to identify the core for AMD dual core setups. Patch for i386/x86-64. Signed-off-by:
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Andi Kleen authored
This works around a bug in the AMD K8 CPUs. Signed-off-by:
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Andi Kleen authored
Cleans up the system exit call slightly and synchronizes with my tree again. Signed-off-by:
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Andi Kleen authored
NR_CPUs can be quite big these days. kmalloc the per CPU array instead of putting it onto the stack Signed-off-by:
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Kirill Korotaev authored
This patch fixes mm->total_vm and mm->locked_vm acctounting in case when move_page_tables() fails inside move_vma(). Signed-Off-By:
Kirill Korotaev <dev@sw.ru> Signed-off-by:
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Bjorn Steinbrink authored
This patch fixes a bug introduced by the "mm counter operations through macros" patch, which replaced a decrement operation in with an increment macro in try_to_unmap_one(). Signed-off-by:
Björn Steinbrink <B.Steinbrink@gmx.de> Signed-off-by:
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NeilBrown authored
We we set the too early, they may still be in place and possibly get called even though the array didn't get set up properly. Signed-off-by:
Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by:
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NeilBrown authored
When a request crosses a boundary between devices, it needs to be split. But where we should calculate the amount of the request before the boundary to find the split-point, we care currently calculating the amount that is *after* the boundary !!! Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
Replace one memcpy() call with overlapping source and dest arguments with one call to memmove(), to avoid data corruption. Signed-off-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
Actually remove elf.h in the tree. The previous patch, due to a quilt bug/misuse, left it in the tree as a 0-length file, preventing the build to see it as missing and to generate a symlink in its place. Signed-off-by:
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Peter Lundkvist authored
Additional i8xx_tco device support. Cc: David Hardeman <david@2gen.com> Cc: <wim@iguana.be> Signed-off-by:
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Zhang, Yanmin authored
Kernel 2.6 has an ide proc destroy error. Run #modprobe ide-core and #rmmod ide-core, then kernel will dump stack information like below. **********Log****************** Badness in remove_proc_entry at fs/proc/generic.c:693 Call Trace: [<a0000001000117e0>] show_stack+0x80/0xa0 sp=3De0000003e05dfbe0 = bsp=3De0000003e05d0ea8 [<a0000001000120b0>] dump_stack+0x30/0x60 sp=3De0000003e05dfdb0 = bsp=3De0000003e05d0e90 [<a000000100183090>] remove_proc_entry+0x530/0x540 sp=3De0000003e05dfdb0 = bsp=3De0000003e05d0e20 [<a000000221cbd280>] proc_ide_destroy+0x120/0x140 [ide_core] sp=3De0000003e05dfdc0 = bsp=3De0000003e05d0df0 [<a000000221ca65f0>] cleanup_module+0x50/0xa0 [ide_core] sp=3De0000003e05dfdc0 = bsp=3De0000003e05d0dd0 [<a0000001000a9e10>] sys_delete_module+0x390/0x580 sp=3De0000003e05dfdc0 = bsp=3De0000003e05d0d50 [<a00000010000af40>] ia64_ret_from_syscall+0x0/0x20 sp=3De0000003e05dfe30 = bsp=3De0000003e05d0d50 [<a000000000010640>] _stext+0xffffffff00010640/0x400 sp=3De0000003e05e0000 = bsp=3De0000003e05d0d50 Signed-off-by: -
Hugh Dickins authored
VmallocTotal: 34359738367 kB VmallocUsed: 266288 kB VmallocChunk: 18014366299193295 kB is unsettling - x86_64 and some other architectures keep a separate address range for modules in vmalloc's vmlist, which /proc/meminfo should pass over. Signed-off-by:
Hugh Dickins <hugh@veritas.com> Signed-off-by:
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Dmitry Torokhov authored
move serio port's id attributes into separate subdirectory: ..devices/serioX/id_type -> ..devices/serioX/id/type ..devices/serioX/id_proto -> ..devices/serioX/id/proto Signed-off-by:Dmitry Torokhov <dtor@mail.ru> Cc: Vojtech Pavlik <vojtech@suse.cz> Signed-off-by:
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Dmitry Torokhov authored
serport - avoid calling serio_interrupt or serio_write_wakeup on unregistered port. Also fix memory leak which could happen if serport was left unused by moving serio allocation down to serport_ldisc_read. Signed-off-by:
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Dmitry Torokhov authored
ALPS needs to be reset for detection to work reliably when reconnecting. Signed-off-by:
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Andrew Morton authored
Make the alps printk output look consistent. Cc: Vojtech Pavlik <vojtech@suse.cz> Signed-off-by:
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Dmitry Torokhov authored
serio - do not attempt to immediately disconnect port if resume failed, let kseriod take care of it. Otherwise we may attempt to unregister associated input devices which will generate hotplug events which are not handled well during swsusp. Signed-off-by:
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