- 19 Oct, 2004 11 commits
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Russell King authored
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Russell King authored
This provides a number of helper functions and data structures for RTC implementations to make use of, including a standard implemention for /proc/driver/rtc and the rtc miscdevice. It supports runtime registration of RTC timekeeping sources.
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Russell King authored
Footbridge was suffering from a little lack of care and attention; it still had the nasty arch.c file with all the associated #ifdef gross-ness that entailed. Re-jig footbridge support so that each machine type contains all the necessary support code, with a separate common implementation which they all share.
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Ben Dooks authored
Patch from Ben Dooks Timer suspend code fails to check for NULL before calling the timer implementor's suspend or resume hooks. Signed-off-by: Ben Dooks
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Russell King authored
into flint.arm.linux.org.uk:/usr/src/bk/linux-2.6-rmk
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Russell King authored
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Russell King authored
Move machine specific boot variables out of arch/arm/boot/Makefile into arch/arm/mach-*/Makefile.boot.
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Russell King authored
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Russell King authored
In the near future, VFP will want to save state onto the user stack. Therefore, separate out the iwmmxt specific parts, and implement a generic "safe copy to user space using random CPU instructions". This is necessary because iwmmxt and VFP both use special CPU instructions to load and/or save their state.
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Russell King authored
This allows us to eliminate a multiplication when we have a constant delay value, as per x86.
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Russell King authored
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- 18 Oct, 2004 29 commits
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Ingo Molnar authored
This patch fixes all the preempt-after-task->state-is-TASK_DEAD problems we had. Right now, the moment procfs does a down() that sleeps in proc_pid_flush() [it could] our TASK_DEAD state is zapped and we might be back to TASK_RUNNING to and we trigger this assert: schedule(); BUG(); /* Avoid "noreturn function does return". */ for (;;) ; I have split out TASK_ZOMBIE and TASK_DEAD into a separate p->exit_state field, to allow the detaching of exit-signal/parent/wait-handling from descheduling a dead task. Dead-task freeing is done via PF_DEAD. Tested the patch on x86 SMP and UP, but all architectures should work fine. Signed-off-by:Ingo Molnar <mingo@elte.hu> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Ingo Molnar authored
This patch fixes an interaction between the numa=fake=<domains> feature, the domain setup code and cpu_siblings_map[]. The bug leads to a bootup crash when using numa=fake=2 on a 2-way/4-way SMP+HT box. When SCHED_SMT is turned on the domains-setup code relies on siblings not spanning multiple domains (which makes perfect sense). But numa=fake=2 creates an assymetric 1101/0010 splitup between CPUs, which results in two siblings being on different nodes. The patch adds a check_siblings_map() function that checks the sibling maps and fixes them up if they violate this rule. (it also prints a warning in that case.) The patch also turns SCHED_DOMAIN_DEBUG back on - had this been enabled we'd have noticed this bug much earlier. From: Badari Pulavarty <pbadari@us.ibm.com> arch/x86_64/mm/numa.c: In function `numa_setup': arch/x86_64/mm/numa.c:332: error: `numa_fake' undeclared (first use in this function) arch/x86_64/mm/numa.c:332: error: (Each undeclared identifier is reported only once arch/x86_64/mm/numa.c:332: error: for each function it appears in.) Signed-off-by:
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Matthew Dobson authored
NODE_BALANCE_RATE is defined all over the place, but used nowhere. Let's remove it. Signed-off-by:
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Matthew Dobson authored
Here's yet another version of a patch to implement per-arch SD_*_INITs. This follows the same basic idea of my last patch, but 1) defines an arch-specific SD_NODE_INIT for the 4 NUMA arches (i386, x86_64, IA64 & PPC64), 2) defines *default* SD_CPU_INIT & SD_SIBLING_INIT for *all* arches, with the possibility of them being overridden by simply defining an arch-specific version in include/asm/topology.h. The motivation behind the third version of this patch is that Martin feels that there should be no "default" NUMA initializer because NUMA characteristics are *very* arch/platform specific, and hence a "default" NUMA initializer can only lead to confusion. I agree with most of that, but don't quite see as much harm in having a default as he does. Nevertheless, to keep him quiet, I've run up this version of the patch. Martin, please run this through your magic test suite and make sure I didn't break anything trivial. Signed-off-by:
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Peter Williams authored
Problem: In the function try_to_wake_up(), when the runqueue's nr_uninterruptible field is decremented it's possible (on SMP systems) that the pointer no longer points to the runqueue that the task being woken was on when it went to sleep. This would cause the wrong runqueue's field to be decremented and the correct one tp remain unchanged. Fix: Save a pointer to the old runqueue at the beginning of the function and use it when decrementing nr_uninterruptible. Signed-off-by:
Peter Williams <pwil3058@bigpond.net.au> Signed-off-by:
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Andrew Morton authored
Better debugging output when the CPU scheduler detects atomicity errors. Signed-off-by:
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Nick Piggin authored
Still having some trouble with ia64 domain setup on the Altixes. Jesse hasn't had much time to look into it, and I'm lacking an Altix, so I'm not sure if this is right or not... Anyway, it again does the right thing on the NUMAQ, and fixes some real bugs, so can you include it please? * Increase SD_NODES_PER_DOMAIN to 6 from 4 to better match Altix's topology. A setting of 4 will include this node, the other one in the brick, and the 2 nodes in the next closest brick, while 6 will catch 2 other bricks. Probably it could be increased even more. * Work correctly with sparse and not completely full node maps. * Nasty typo fixed in find_next_best_node: - val = node_distance(node, i); + val = node_distance(node, n); * Ensure all nodes are themselves a member of their numa balancing domain. This is more a precaution against creative implementations of node_distance.. but it makes the setup easier to verify without having to look at a table of node_distance's, which is possibly generated at runtime. So again, I'm not too sure if this will fix the Altix setup or not. But if you do a release, it will surely be less broken than it was before. Signed-off-by:
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Nick Piggin authored
Use CPU_DOWN_FAILED notifier in the sched-domains hotplug code. This goes with 4/8 "integrate cpu hotplug and sched domains" Signed-off-by:
Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by:
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Nick Piggin authored
Introduce CPU_DOWN_FAILED notifier, so we can cope with a failure after a CPU_DOWN_PREPARE notice. This fixes 3/8 "add CPU_DOWN_PREPARE notifier" to be useful Signed-off-by:
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Nick Piggin authored
Actually turn on SD_LOAD_BALANCE for the regular domains. Introduced by 5/8 "sched add load balance flag". Signed-off-by:
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Nick Piggin authored
Fix an oops in the domain debug code when isolated CPUs are specified. Introduced by 5/8 "sched add load balance flag" Signed-off-by:
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Nick Piggin authored
Implement disjoint NUMA domain setup for IA64 architecture. Most of the code was what was ripped out of kernel/sched.c, which was written by Jesse Barnes <jbarnes@sgi.com>. I fixed up the tricky NUMA groups initialistion. Signed-off-by:
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Nick Piggin authored
Allow sched domain setup to be overridden by arch code. This functionality is needed again. From: Paul Jackson <pj@sgi.com> Builds of 2.6.9-rc1-mm5 ia64 NUMA configs fail, with many complaints that SD_NODE_INIT is defined twice, in asm/processor.h and linux/sched.h. I guess that the preprocessor conditionals were wrong when Nick added the per-arch override ability again of SD_NODE_INIT were wrong. At least this change lets me rebuild ia64 again. Signed-off-by:
Paul Jackson <pj@sgi.com> Signed-off-by:
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Nick Piggin authored
Remove the disjoint NUMA domains setup code. It was broken. Signed-off-by:
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Nick Piggin authored
Introduce SD_LOAD_BALANCE flag for domains where we don't want to do load balancing (so we don't have to set up meaningless spans and groups). Use this for the initial dummy domain, and just leave isolated CPUs on the dummy domain. Signed-off-by:
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Andrew Morton authored
kernel/sched.c:4114: warning: `arch_destroy_sched_domains' defined but not used Signed-off-by:
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Nick Piggin authored
Register a cpu hotplug notifier which reinitializes the scheduler domains hierarchy. The notifier temporarily attaches all running cpus to a "dummy" domain (like we currently do during boot) to avoid balancing. It then calls arch_init_sched_domains which rebuilds the "real" domains and reattaches the cpus to them. Also change __init attributes to __devinit where necessary. Signed-off-by:
Nathan Lynch <nathanl@austin.ibm.com> Alterations from Nick Piggin: * Detach all domains in CPU_UP|DOWN_PREPARE notifiers. Reinitialise and reattach in CPU_ONLINE|DEAD|UP_CANCELED. This ensures the domains as seen from the scheduler won't become out of synch with the cpu_online_map. * This allows us to remove runtime cpu_online verifications. Do that. * Dummy domains are __devinitdata. * Remove the hackery in arch_init_sched_domains to work around the fact that the domains used to work with cpu_possible maps, but node_to_cpumask returned a cpu_online map. Signed-off-by:
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Nick Piggin authored
Add a CPU_DOWN_PREPARE hotplug CPU notifier. This is needed so we can dettach all sched-domains before a CPU goes down, thus we can build domains from online cpumasks, and not have to check for the possibility of a CPU coming up or going down. Signed-off-by:
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Nick Piggin authored
The following patches properly intergrate sched domains and cpu hotplug (using Nathan's code), by having sched-domains *always* only represent online CPUs, and having hotplug notifier to keep them up to date. Then tackle Jesse's domain setup problem: the disjoint top-level domains were completely broken. The group-list builder thingy simply can't handle distinct sets of groups containing the same CPUs. The code is ugly and specific enough that I'm re-introducing the arch overridable domains. I doubt we'll get a proliferation of implementations, because the current generic code can do the job for everyone but SGI. I'd rather take a look at it again down the track if we need to rather than try to shoehorn this into the generic code. Nathan and I have tested the hotplug work. He's happy with it. I've tested the disjoint domain stuff (copied it to i386 for the test), and it does the right thing on the NUMAQ. I've asked Jesse to test it as well, but it should be fine - maybe just help me out and run a test compile on ia64 ;) This really gets sched domains into much better shape. Without further ado, the patches. This patch: Make a definition static and slightly sanitize ifdefs. Signed-off-by:
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Vladimir Grouzdev authored
The xtime value may become incorrect when the update_wall_time(ticks) function is called with "ticks" > 1. In such a case, the xtime variable is updated multiple times inside the loop but it is normalized only once outside of the loop. This bug was reported at: http://bugme.osdl.org/show_bug.cgi?id=3403Signed-off-by:
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Jeff Mahoney authored
This patch fixes several missing reiserfs_write_unlock() calls on error paths not introduced by reiserfs-io-error-handling.diff Signed-off-by:
Jeff Mahoney <jeffm@novell.com> Signed-off-by:
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Jeff Mahoney authored
This patch allows ReiserFS to handle I/O errors in the journal (or journal flush) where it would have previously panicked. The new behavior is to mark the filesystem read-only, disallow new transactions to be started, and to allow existing transactions to complete (though not to commit). The resultant filesystem can be safely umounted, and checked via normal mechanisms. As it is a journaling filesystem, the filesystem itself will be in a similar state to the power being cut to the machine, once umounted. Signed-off-by:
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Jeff Mahoney authored
This patch cleans up fs/reiserfs/journal.c such that repeated uses of SB_JOURNAL(p_s_sb) are removed in favor of a local journal variable. The compiler won't care, and it makes the code much easier to read. Signed-off-by:
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Jeff Mahoney authored
This patch cleans up ReiserFS's use of buffer head flags. All direct access of BH_* are made into macro calls, and all reiserfs-specific BH_* macro implementations have been removed and replaced with the BUFFER_FNS implementations found in linux/buffer_head.h Signed-off-by:
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Gerald Schaefer authored
Add support to read z/VM monitor records. Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Eric Rossman authored
crypto driver changes: - Add support for zero-pad and crypto express II (CEX2C). Signed-off-by:
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Stefan Weinhuber authored
Add an interface to read from the z/VM recording system services. Signed-off-by:
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Arnd Bergmann authored
Add support for z/VM watchdog timer. Signed-off-by:
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Martin Schwidefsky authored
From: Frank Pavlic <pavlic@de.ibm.com> From: Thomas Spatzier <tspat@de.ibm.com> qeth network driver changes: - Add Layer 2 support for OSA-Express. Signed-off-by:
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