- 16 Nov, 2005 3 commits
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Steve French authored
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Steve French authored
(and a ppc64 compiler warning) Signed-off-by:
Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by:
Steve French <sfrench@us.ibm.com>
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Steve French authored
created by SFU (part 1 of 2). Signed-off-by:
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- 15 Nov, 2005 37 commits
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Chen, Kenneth W authored
Our performance validation on 2.6.15-rc1 caught a disastrous performance regression on ia64 with netperf (-98%) and volanomark (-58%) compares to previous kernel version 2.6.14-git7. See the following chart (result group 1 & 2). http://kernel-perf.sourceforge.net/results.machine_id=26.html We have root caused it to commit 64c7c8f8 This changeset broke the ia64 task resched notification. In sched.c:resched_task(), a reschedule IPI is conditioned upon TIF_POLLING_NRFLAG. However, the above changeset unconditionally set the polling thread flag for idle tasks regardless whether pal_halt_light is in use or not. As a result, resched IPI is not sent from resched_task(). And since the default behavior on ia64 is to use pal_halt_light, we end up delaying the rescheduling task until next timer tick, and thus cause the performance regression. This fixes the performance bug. I'm glad our performance suite is turning up bad performance bug like this in time. Signed-off-by:
Ken Chen <kenneth.w.chen@intel.com> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Linus Torvalds authored
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Linus Torvalds authored
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Russell King authored
This avoids a BUG_ON with kref.c when SA1111 tries to register a driver with an unregistered bus type. Signed-off-by:Russell King <rmk+kernel@arm.linux.org.uk>
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Jeff Garzik authored
- Fix a regression in command completion, which prevented the restart of the DMA engine after the device throws an error. - Pack more hardware info into the port-reset error message. - Promote "welcome to our timeout" message from debug msg to normal printk.
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Dave Jones authored
Something I've found handy countless times when users do this.. Signed-off-by:
Dave Jones <davej@redhat.com> Acked-by:
Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Ben Collins authored
Picked from the ubuntu-2.6 tree The change in location for ll_rw_blk.c from drivers/block/ to block/ caused failure to generate documentation. Signed-off-by:
Ben Collins <bcollins@ubuntu.com> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: Jens Axboe <axboe@suse.de> Signed-off-by:
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Grant Coady authored
drivers/block/cciss_scsi.c:264: warning: `print_bytes' defined but not used drivers/block/cciss_scsi.c:298: warning: `print_cmd' defined but not used Signed-off-by:
Grant Coady <gcoady@gmail.com> Acked-by:
Mike Miller <mike.miller@hp.com> Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
Christoph Hellwig <hch@lst.de> Acked-by:
Miles Bader <miles@gnu.org> Signed-off-by:
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Miles Bader authored
Signed-off-by:
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Miles Bader authored
A variable was being used in multiple conflicting ways. I also restructured the code a bit for clarity. Signed-off-by:
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Toni Mueller authored
gcc4 doesn't allow typecasted lvals. Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by:
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Andrew Morton authored
We need to use the USB_DEVICE macro here, else the modinfo aliases go all wrong. Also, correctly terminate the table, as noted by Dave Jones <davej@redhat.com> Cc: Greg KH <greg@kroah.com> Signed-off-by:
Karsten Keil <kkeil@suse.de> Signed-off-by:
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NeilBrown authored
Despite the fact that md threads don't need to be signalled, and won't respond to signals anyway, we need to have an 'interruptible' wait, else they stay in 'D' state and add to the load average. (akpm: the signal_pending() test is unneeded - we'll fix that up in the next round. For now, leave it there because that's how the code used to be). Signed-off-by:
Neil Brown <neilb@suse.de> Signed-off-by:
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NeilBrown authored
This was marked deprecated "after 2.6" back in the 2.5 days. But now it seems there isn't going to be any "after 2.6", and we deprecate by date now. So set a date. Signed-off-by:
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NeilBrown authored
Being kernel-threads, nfsd servers don't get pre-empted (depending on CONFIG). If there is a steady stream of NFS requests that can be served from cache, an nfsd thread may hold on to a cpu indefinitely, which isn't very friendly. So it is good to have a cond_resched in there (just before looking for a new request to serve), to make sure we play nice. Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Ben Collins authored
These exported symbols are in arch/ppc/ but missing from arch/powerpc/ for ppc32 builds. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
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Corey Minyard authored
Lots of good changes to the driver lately that userspace will care about the version of the driver. Bump the version from 36.0 to 38.0 to be higher than 37 that the 2.4 driver came out with a few weeks ago which doesn't have all the same changes. Signed-off-by:
Matt Domsch <Matt_Domsch@dell.com> Signed-off-by:
Corey Minyard <minyard@acm.org> Signed-off-by:
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Harald Welte authored
Make sysctl.h (again) useable from userspace Signed-off-by:
Harald Welte <laforge@netfilter.org> Signed-off-by:
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Vivek Goyal authored
A patch by Eric was merged (f2b36db6) and later on reverted back (1e4c85f9). Along with above patch, another patch was posted and has been merged (3d1675b4). That patch was dependent on the above patch and now it should also be reverted. Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Russell King authored
Rather than defining our own PM option, use kernel/power/Kconfig. This fixes build errors introduced by bca73e4bSigned-off-by:
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Linus Torvalds authored
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Bob Picco authored
Fix up booting with sparse mem enabled. Otherwise it would just cause an early PANIC at boot. Signed-off-by:
Bob Picco <bob.picco@hp.com> Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Andi Kleen authored
This is needed for large multinode IBM systems which have a sparse APIC space in clustered mode, fully covering the available 8 bits. The previous kernels would limit the local APIC number to 127, which caused it to reject some of the CPUs at boot. I increased the maximum and shrunk the apic_version array a bit to make up for that (the version is only 8 bit, so don't need an full int to store) Cc: Chris McDermott <lcm@us.ibm.com> Signed-off-by:
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Andi Kleen authored
CONFIG_CHECKING covered some debugging code used in the early times of the port. But it wasn't even SMP safe for quite some time and the bugs it checked for seem to be gone. This patch removes all the code to verify GS at kernel entry. There haven't been any new bugs in this area for a long time. Previously it also covered the sysctl for the page fault tracing. That didn't make much sense because that code was unconditionally compiled in. I made that a boot option now because it is typically only useful at boot. Signed-off-by:
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Magnus Damm authored
The current x86_64 NUMA memory code is inconsequent when it comes to node memory ranges. The exact behaviour varies depending on which config option that is used. setup_node_bootmem() has start and end as arguments and these are used to calculate the size of the node like this: (end - start). This is all fine if end is pointing to the first non-available byte. The problem is that the current x86_64 code sometimes treats it as the last present byte and sometimes as the first non-available byte. The result is that some configurations might lose a page at the end of the range. This patch tries to fix CONFIG_ACPI_NUMA, CONFIG_K8_NUMA and CONFIG_NUMA_EMU so they all treat the end variable as the first non-available byte. This is the same way as the single node code. The patch is boot tested on dual x86_64 hardware with the above configurations, but maybe the removed code is needed as some workaround? Signed-off-by:
Magnus Damm <magnus@valinux.co.jp> Signed-off-by:
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Andi Kleen authored
The logging for boot errors was turned off because it was broken on some AMD systems. But give Intel EM64T systems a chance because they are supposed to be correct there. The advantage is that there is a chance to actually log uncorrected machine checks after the reset. Signed-off-by:
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Ravikiran G Thirumalai authored
On x86_64 arches, there is no way to choose ACPI_NUMA without having to choose K8_NUMA. CONFIG_K8_NUMA is not needed for Intel EM64T NUMA boxes. It also looks odd if you have to select ACPI_NUMA from the power management menu. This patch fixes those oddities. Patch does the following: 1. Makes NUMA a config option like other arches 2. Makes topology detection options like K8_NUMA dependent on NUMA 3. Choosing ACPI NUMA detection can be done from the standard "Processor type and features" menu AK: I fixed up the dependencies and changed the help texts a bit on top of Kiran's patch. Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
Shai Fultheim <shai@scalex86.org> Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
Keeping this function does not makes sense because it's a copied (and buggy) copy of sys_time. The only difference is that now.tv_sec (which is a time_t, i.e. a 64-bit long) is copied (and truncated) into a int (32-bit). The prototype is the same (they both take a long __user *), so let's drop this and redirect it to sys_time (and make sure it exists by defining __ARCH_WANT_SYS_TIME). Only disadvantage is that the sys_stime definition is also compiled (may be fixed if needed by adding a separate __ARCH_WANT_SYS_STIME macro, and defining it for all arch's defining __ARCH_WANT_SYS_TIME except x86_64). Acked-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
The current value was correct before the introduction of Intel EM64T support - but now L1_CACHE_SHIFT_MAX can be less than L1_CACHE_SHIFT, which _is_ funny! Between the few users of ____cacheline_maxaligned_in_smp, we also have (for example) rcu_ctrlblk, and struct zone, with zone->{lru_,}lock. I.e. we have a lot of excess cacheline bouncing on them. No correctness issues, obviously. So this could even be merged for 2.6.14 (I'm not a fan of this idea, though). CC: Andi Kleen <ak@suse.de> Signed-off-by: -
Andi Kleen authored
Not needed since x86-64 always uses the spinlock based rwsems. Signed-off-by:
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Andi Kleen authored
B stepping were the first shipping Opterons. memcpy/memset/copy_page/ clear_page had special optimized version for them. These are really old and in the minority now and the difference to the generic versions (using rep microcode) is not that big anyways. So just remove them. TODO: figure out optimized versions for Intel Netburst based EM64T Signed-off-by:
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Andi Kleen authored
Old code could retry for 10 seconds worst time. Only try it for one second now. Suggested by Yinghai Lu Cc: Yinghai.Lu@amd.com Signed-off-by:
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Siddha, Suresh B authored
Fix the Intel cache detection code assumption that number of threads sharing the cache will either be equal to number of HT or core siblings. This also cleans up the code in general a bit. Signed-off-by:
Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by:
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Siddha, Suresh B authored
Fields obtained through cpuid vector 0x1(ebx[16:23]) and vector 0x4(eax[14:25], eax[26:31]) indicate the maximum values and might not always be the same as what is available and what OS sees. So make sure "siblings" and "cpu cores" values in /proc/cpuinfo reflect the values as seen by OS instead of what cpuid instruction says. This will also fix the buggy BIOS cases (for example where cpuid on a single core cpu says there are "2" siblings, even when HT is disabled in the BIOS. http://bugzilla.kernel.org/show_bug.cgi?id=4359) Signed-off-by:
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Andi Kleen authored
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Andi Kleen authored
When they were disabled before (e.g. after a panic) it's better to keep them off, otherwise followon panics can happen from timer interrupt handlers etc. Drawback is that pageup in the console won't work anymore though. Signed-off-by:
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