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* sched: mark CONFIG_FAIR_GROUP_SCHED as !EXPERIMENTALIngo Molnar2007-10-24
| | | | | | | mark CONFIG_FAIR_GROUP_SCHED as !EXPERIMENTAL. All bugs have been fixed and it's perfect ;-) Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: isolate SMP balancing code a bit morePeter Williams2007-10-24
| | | | | | | | | | | | | | | At the moment, a lot of load balancing code that is irrelevant to non SMP systems gets included during non SMP builds. This patch addresses this issue and reduces the binary size on non SMP systems: text data bss dec hex filename 10983 28 1192 12203 2fab sched.o.before 10739 28 1192 11959 2eb7 sched.o.after Signed-off-by: Peter Williams <pwil3058@bigpond.net.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: reduce balance-tasks overheadPeter Williams2007-10-24
| | | | | | | | | | | | | | | At the moment, balance_tasks() provides low level functionality for both move_tasks() and move_one_task() (indirectly) via the load_balance() function (in the sched_class interface) which also provides dual functionality. This dual functionality complicates the interfaces and internal mechanisms and makes the run time overhead of operations that are called with two run queue locks held. This patch addresses this issue and reduces the overhead of these operations. Signed-off-by: Peter Williams <pwil3058@bigpond.net.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: make cpu_shares_{show,store}() staticAdrian Bunk2007-10-24
| | | | | | | cpu_shares_{show,store}() can become static. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: clean up some control group codePaul Menage2007-10-24
| | | | | | | | | - replace "cont" with "cgrp" in a few places in the CFS cgroup code, - use write_uint rather than write for cpu.shares write function Signed-off-by: Paul Menage <menage@google.com> Acked-by : Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: constify sched.hJoe Perches2007-10-24
| | | | | | | Add const to some struct task_struct * uses Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: document profile=sleep requiring CONFIG_SCHEDSTATSMel Gorman2007-10-24
| | | | | | | | | profile=sleep only works if CONFIG_SCHEDSTATS is set. This patch notes the limitation in Documentation/kernel-parameters.txt and prints a warning at boot-time if profile=sleep is used without CONFIG_SCHEDSTAT. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: use show_regs() to improve __schedule_bug() outputSatyam Sharma2007-10-24
| | | | | | | | | | | | | | | A full register dump along with stack backtrace would make the "scheduling while atomic" message more helpful. Use show_regs() instead of dump_stack() for this. We already know we're atomic in here (that is why this function was called) so show_regs()'s atomicity expectations are guaranteed. Also, modify the output of the "BUG: scheduling while atomic:" header a bit to keep task->comm and task->pid together and preempt_count() after them. Signed-off-by: Satyam Sharma <satyam@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: clean up sched_domain_debug()Ingo Molnar2007-10-24
| | | | | | | | | | | | clean up sched_domain_debug(). this also shrinks the code a bit: text data bss dec hex filename 50474 4306 480 55260 d7dc sched.o.before 50404 4306 480 55190 d796 sched.o.after Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: fix fastcall mismatch in completion APIsIngo Molnar2007-10-24
| | | | | | | | | | Jeff Dike noticed that wait_for_completion_interruptible()'s prototype had a mismatched fastcall. Fix this by removing the fastcall attributes from all the completion APIs. Found-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* sched: fix sched_domain sysctl registration againMilton Miller2007-10-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 029190c515f15f512ac85de8fc686d4dbd0ae731 (cpuset sched_load_balance flag) was not tested SCHED_DEBUG enabled as committed as it dereferences NULL when used and it reordered the sysctl registration to cause it to never show any domains or their tunables. Fixes: 1) restore arch_init_sched_domains ordering we can't walk the domains before we build them presently we register cpus with empty directories (no domain directories or files). 2) make unregister_sched_domain_sysctl do nothing when already unregistered detach_destroy_domains is now called one set of cpus at a time unregister_syctl dereferences NULL if called with a null. While the the function would always dereference null if called twice, in the previous code it was always called once and then was followed a register. So only the hidden bug of the sysctl_root_table not being allocated followed by an attempt to free it would have shown the error. 3) always call unregister and register in partition_sched_domains The code is "smart" about unregistering only needed domains. Since we aren't guaranteed any calls to unregister, always unregister. Without calling register on the way out we will not have a table or any sysctl tree. 4) warn if register is called without unregistering The previous table memory is lost, leaving pointers to the later freed memory in sysctl and leaking the memory of the tables. Before this patch on a 2-core 4-thread box compiled for SMT and NUMA, the domains appear empty (there are actually 3 levels per cpu). And as soon as two domains a null pointer is dereferenced (unreliable in this case is stack garbage): bu19a:~# ls -R /proc/sys/kernel/sched_domain/ /proc/sys/kernel/sched_domain/: cpu0 cpu1 cpu2 cpu3 /proc/sys/kernel/sched_domain/cpu0: /proc/sys/kernel/sched_domain/cpu1: /proc/sys/kernel/sched_domain/cpu2: /proc/sys/kernel/sched_domain/cpu3: bu19a:~# mkdir /dev/cpuset bu19a:~# mount -tcpuset cpuset /dev/cpuset/ bu19a:~# cd /dev/cpuset/ bu19a:/dev/cpuset# echo 0 > sched_load_balance bu19a:/dev/cpuset# mkdir one bu19a:/dev/cpuset# echo 1 > one/cpus bu19a:/dev/cpuset# echo 0 > one/sched_load_balance Unable to handle kernel paging request for data at address 0x00000018 Faulting instruction address: 0xc00000000006b608 NIP: c00000000006b608 LR: c00000000006b604 CTR: 0000000000000000 REGS: c000000018d973f0 TRAP: 0300 Not tainted (2.6.23-bml) MSR: 9000000000009032 <EE,ME,IR,DR> CR: 28242442 XER: 00000000 DAR: 0000000000000018, DSISR: 0000000040000000 TASK = c00000001912e340[1987] 'bash' THREAD: c000000018d94000 CPU: 2 .. NIP [c00000000006b608] .unregister_sysctl_table+0x38/0x110 LR [c00000000006b604] .unregister_sysctl_table+0x34/0x110 Call Trace: [c000000018d97670] [c000000007017270] 0xc000000007017270 (unreliable) [c000000018d97720] [c000000000058710] .detach_destroy_domains+0x30/0xb0 [c000000018d977b0] [c00000000005cf1c] .partition_sched_domains+0x1bc/0x230 [c000000018d97870] [c00000000009fdc4] .rebuild_sched_domains+0xb4/0x4c0 [c000000018d97970] [c0000000000a02e8] .update_flag+0x118/0x170 [c000000018d97a80] [c0000000000a1768] .cpuset_common_file_write+0x568/0x820 [c000000018d97c00] [c00000000009d95c] .cgroup_file_write+0x7c/0x180 [c000000018d97cf0] [c0000000000e76b8] .vfs_write+0xe8/0x1b0 [c000000018d97d90] [c0000000000e810c] .sys_write+0x4c/0x90 [c000000018d97e30] [c00000000000852c] syscall_exit+0x0/0x40 Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Linux 2.6.24-rc1v2.6.24-rc1Linus Torvalds2007-10-23
| | | | | | | | | | | The patch is big. Really big. You just won't believe how vastly hugely mindbogglingly big it is. I mean you may think it's a long way down the road to the chemist, but that's just peanuts to how big the patch from 2.6.23 is. But it's all good. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* add port definition for mcf UART driverGreg Ungerer2007-10-23
| | | | | | | Add a port type definition for the Freescale UART driver ports (mcf.c). Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: remove unused machdep variable definitionsGreg Ungerer2007-10-23
| | | | | | | | Remove old definitions of the timer function pointers. Add definitions of the common hardware timer functions. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: define DMA channels for ColdFire 532xGreg Ungerer2007-10-23
| | | | | | | Create definition for DMA channels on the ColdFire 532x family. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: add platform struct for ColdFire UART driverGreg Ungerer2007-10-23
| | | | | | | Add platform support structure for use with new ColdFire UART driver. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: mark mem init functions as __initGreg Ungerer2007-10-23
| | | | | | | Mark the m68knommu memory init functions as __init. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: mark setup_arch() as __initGreg Ungerer2007-10-23
| | | | | | | Mark the m68knommu setup_arch() function as __init. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: cleanup 68VZ328 init codeGreg Ungerer2007-10-23
| | | | | | | | Removed header includes not needed. Remove use of old m68knommu timer function pointers. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: cleanup 68EZ328 init codeGreg Ungerer2007-10-23
| | | | | | | | Clean up 68EZ328 timer support code. Removed header includes not needed. Remove use of old m68knommu timer function pointers. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: cleanup 68360 startup codeGreg Ungerer2007-10-23
| | | | | | | | | Clean up 68360 timer support code. Removed header includes not needed. Remove use of old m68knommu timer function pointers. Use common function naming for 68328 timer functions. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: cleanup 68328 timer codeGreg Ungerer2007-10-23
| | | | | | | | Use common function naming for 68328 timer functions to make them consistent with the various other hardware m68knommu timers. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: cleanup 68328 init codeGreg Ungerer2007-10-23
| | | | | | | | Clean up 68328 timer support code. Removed header includes not needed. Remove use of old m68knommu timer function pointers. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68knommu: remove unused variables in setup.cGreg Ungerer2007-10-23
| | | | | | | Remove unused variables from setup.c code. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'irq-upstream' of ↵Linus Torvalds2007-10-23
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6 * 'irq-upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6: [SPARC, XEN, NET/CXGB3] use irq_handler_t where appropriate drivers/char/riscom8: clean up irq handling isdn/sc: irq handler clean isdn/act2000: fix major bug. clean irq handler. char/pcmcia/synclink_cs: trim trailing whitespace drivers/char/ip2: separate polling and irq-driven work entry points drivers/char/ip2: split out irq core logic into separate function [NETDRVR] lib82596, netxen: delete pointless tests from irq handler Eliminate pointless casts from void* in a few driver irq handlers. [PARPORT] Remove unused 'irq' argument from parport irq functions [PARPORT] Kill useful 'irq' arg from parport_{generic_irq,ieee1284_interrupt} [PARPORT] Consolidate code copies into a single generic irq handler
| * [SPARC, XEN, NET/CXGB3] use irq_handler_t where appropriateJeff Garzik2007-10-23
| | | | | | | | | | | | | | Rather than hand-rolling our own prototype, make the code more future-proof by using the standard irq_handler_t typedef. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * drivers/char/riscom8: clean up irq handlingJeff Garzik2007-10-23
| | | | | | | | | | | | | | | | | | | | Make irq handling more efficient, by passing board pointer via request_irq() to our irq handler's dev_id argument. This eliminates a table lookup upon each interrupt, and eliminates an associated global variable (the table). Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * isdn/sc: irq handler cleanJeff Garzik2007-10-23
| | | | | | | | | | | | | | | | * pass card number to irq handler * use card number in irq handler to avoid looping through each adapter Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * isdn/act2000: fix major bug. clean irq handler.Jeff Garzik2007-10-23
| | | | | | | | | | | | | | | | | | * invert sense of request_irq() test. otherwise we will always fail, when IRQ is available. * no need to use 'irq' function arg, its stored in a data struct already Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * char/pcmcia/synclink_cs: trim trailing whitespaceJeff Garzik2007-10-23
| | | | | | | | Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * drivers/char/ip2: separate polling and irq-driven work entry pointsJeff Garzik2007-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Polling currently calls the irq handler, which loops through all the boards, calling the work function for all polling boards with work. irq handling loops through all the boards, finding the specific board that applies to us, and calling the work just for that one board. The two logics are sufficiently different to warrant different functions, rather than being slack and calling the same function in two different ways. This serves to make the interrupt handler a -lot- more efficient. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * drivers/char/ip2: split out irq core logic into separate functionJeff Garzik2007-10-23
| | | | | | | | | | | | No changes besides code movement and glue. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * [NETDRVR] lib82596, netxen: delete pointless tests from irq handlerJeff Garzik2007-10-23
| | | | | | | | | | | | | | | | Remove always-false tests in irq handler. Also a few other minor cleanups. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * Eliminate pointless casts from void* in a few driver irq handlers.Jeff Garzik2007-10-23
| | | | | | | | Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * [PARPORT] Remove unused 'irq' argument from parport irq functionsJeff Garzik2007-10-23
| | | | | | | | | | | | | | None of the drivers with a struct pardevice's ->irq_func() hook ever used the 'irq' argument passed to it, so remove it. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * [PARPORT] Kill useful 'irq' arg from parport_{generic_irq,ieee1284_interrupt}Jeff Garzik2007-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | parport_ieee1284_interrupt() was not using its first arg at all. Delete. parport_generic_irq()'s second arg makes its first arg completely redundant. Delete, and use port->irq in the one place where we actually need it. Also, s/__inline__/inline/ to make the code look nicer. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * [PARPORT] Consolidate code copies into a single generic irq handlerJeff Garzik2007-10-23
| | | | | | | | | | | | | | | | | | Several arches used the exact same code for their parport irq handling. Make that code generic, in parport_irq_handler(). Also, s/__inline__/inline/ in include/linux/parport.h. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* | Merge branch 'warnings' of ↵Linus Torvalds2007-10-23
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6 * 'warnings' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6: ni5010: kill unused variable eexpress: fix !SMP unused-var warning cgroup: kill unused variable
| * | ni5010: kill unused variableJeff Garzik2007-10-23
| | | | | | | | | | | | Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * | eexpress: fix !SMP unused-var warningJeff Garzik2007-10-23
| | | | | | | | | | | | Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * | cgroup: kill unused variableJeff Garzik2007-10-23
| |/ | | | | | | Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* | Merge branch 'upstream-linus' of ↵Linus Torvalds2007-10-23
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 * 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (39 commits) Remove Andrew Morton from list of net driver maintainers. bonding: Acquire correct locks in alb for promisc change bonding: Convert more locks to _bh, acquire rtnl, for new locking bonding: Convert locks to _bh, rework alb locking for new locking bonding: Convert miimon to new locking bonding: Convert balance-rr transmit to new locking Convert bonding timers to workqueues Update MAINTAINERS to reflect my (jgarzik's) current efforts. pasemi_mac: fix typo defxx.c: dfx_bus_init() is __devexit not __devinit s390 MAINTAINERS remove header_ops bug in qeth driver sky2: crash on remove MIPSnet: Delete all the useless debugging printks. AR7 ethernet: small post-merge cleanups and fixes mv643xx_eth: Hook up mv643xx_get_sset_count mv643xx_eth: Remove obsolete checksum offload comment mv643xx_eth: Merge drivers/net/mv643xx_eth.h into mv643xx_eth.c mv643xx_eth: Remove unused register defines mv643xx_eth: Clean up mv643xx_eth.h ...
| * | Remove Andrew Morton from list of net driver maintainers.Jeff Garzik2007-10-23
| | | | | | | | | | | | | | | | | | | | | He now rules the world, not just this tiny tract of land. Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Acked-by: Andrew Morton
| * | bonding: Acquire correct locks in alb for promisc changeJay Vosburgh2007-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | Update ALB mode monitor to hold correct locks (RTNL and nothing else) when calling dev_set_promiscuity. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | bonding: Convert more locks to _bh, acquire rtnl, for new lockingJay Vosburgh2007-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert more lock acquisitions to _bh flavor to avoid deadlock with workqueue activity and add acquisition of RTNL in appropriate places. Affects ALB mode, as well as core bonding functions and sysfs. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | bonding: Convert locks to _bh, rework alb locking for new lockingJay Vosburgh2007-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert locking-related activity to new & improved system. Convert some lock acquisitions to _bh and rework parts of ALB mode, both to avoid deadlocks with workqueue activity. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | bonding: Convert miimon to new lockingJay Vosburgh2007-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert mii (link state) monitor to acquire correct locks for failover events. In particular, failovers generally require RTNL at a low level (when manipulating device MAC addresses, for example) and no other locks. The high level monitor is responsible for acquiring a known set of locks, RTNL, the bond->lock for read and the slave_lock for write, and the low level failover processing can then release appropriate locks as needed. This patch provides the high level portion. As it is undesirable to acquire RTNL for every monitor pass (which may occur as often as every 10 ms), the miimon has been converted to do conditional locking. A first pass inspects all slaves to determine if any action is required, and if so, a second pass (after acquring RTNL) is done to perform any actions (doing a complete rescan, as the situation may have changed when all locks were released). Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | bonding: Convert balance-rr transmit to new lockingJay Vosburgh2007-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change locking in balance-rr transmit processing to use a free running counter to determine which slave to transmit on. Instead, a free-running counter is maintained, and modulo arithmetic used to select a slave for transmit. This removes lock operations from the TX path, and eliminates a deadlock introduced by the conversion to work queues. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | Convert bonding timers to workqueuesJay Vosburgh2007-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert bonding timers to workqueues. This converts the various monitor functions to run in periodic work queues instead of timers. This patch introduces the framework and convers the calls, but does not resolve various locking issues, and does not stand alone. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | Update MAINTAINERS to reflect my (jgarzik's) current efforts.Jeff Garzik2007-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove net driver entries (they fall under the more general 'net driver maintainer') umbrella. Remove entries for older drivers that either no longer exist, are about to be removed, or I no longer care about. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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