- 24 Oct, 2007 40 commits
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Peter Williams authored
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>
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Peter Williams authored
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:
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Adrian Bunk authored
cpu_shares_{show,store}() can become static. Signed-off-by:Adrian Bunk <bunk@kernel.org> Signed-off-by:
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Paul Menage authored
- 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:
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Joe Perches authored
Add const to some struct task_struct * uses Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
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Mel Gorman authored
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:
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Satyam Sharma authored
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:
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Ingo Molnar authored
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 authored
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:
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Milton Miller authored
commit 029190c5 (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:
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Linus Torvalds authored
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>
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Greg Ungerer authored
Add a port type definition for the Freescale UART driver ports (mcf.c). Signed-off-by:
Greg Ungerer <gerg@uclinux.org> Signed-off-by:
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Greg Ungerer authored
Remove old definitions of the timer function pointers. Add definitions of the common hardware timer functions. Signed-off-by:
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Greg Ungerer authored
Create definition for DMA channels on the ColdFire 532x family. Signed-off-by:
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Greg Ungerer authored
Add platform support structure for use with new ColdFire UART driver. Signed-off-by:
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Greg Ungerer authored
Mark the m68knommu memory init functions as __init. Signed-off-by:
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Greg Ungerer authored
Mark the m68knommu setup_arch() function as __init. Signed-off-by:
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Greg Ungerer authored
Removed header includes not needed. Remove use of old m68knommu timer function pointers. Signed-off-by:
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Greg Ungerer authored
Clean up 68EZ328 timer support code. Removed header includes not needed. Remove use of old m68knommu timer function pointers. Signed-off-by:
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Greg Ungerer authored
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:
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Greg Ungerer authored
Use common function naming for 68328 timer functions to make them consistent with the various other hardware m68knommu timers. Signed-off-by:
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Greg Ungerer authored
Clean up 68328 timer support code. Removed header includes not needed. Remove use of old m68knommu timer function pointers. Signed-off-by:
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Greg Ungerer authored
Remove unused variables from setup.c code. Signed-off-by:
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Linus Torvalds authored
* '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 -
Linus Torvalds authored
* '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
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Linus Torvalds authored
* '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 ...
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Linus Torvalds authored
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev: jmicron: update quirk for JMB361/3/5/6 libata: add HTS542525K9SA00 to NCQ blacklist libata-core: auditting chk_status v check_status [libata] checkpatch-inspired cleanups
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Jeff Garzik authored
Signed-off-by:Jeff Garzik <jgarzik@redhat.com>
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Jeff Garzik authored
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Jeff Garzik authored
Signed-off-by: -
Tejun Heo authored
Set bits 0, 4, 5 and 7 of PCI configuration register 0x40 in the quirk. This has the following effects and is recommended by the vendor. * Force enable of IDE channels (used to be left alone as BIOS configured) * Change initial phase behavior of PIO cycle such that the host pulls down the bus instead of tristating it. Vendor recommends this setting. The above settings are better for the current generation of controllers and needed for the upcoming next generation. Tested on JMB363. Signed-off-by:
Tejun Heo <htejun@gmail.com> Cc: Ethan Hsiao <ethanhsiao@jmicron.com> Signed-off-by:
Jeff Garzik <jeff@garzik.org>
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Tejun Heo authored
Another one doing spurious NCQ completions. Blacklist it. Signed-off-by:
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Alan Cox authored
Did a complete audit of these and found we have another error case. ata_bus_softreset calls ata_check_status which means that it tries to do an ioread8 on the port blindly and check versus 0xFF for an error. It should of course be using the ap->ops method for this via chk_status, and this bug causes a wrog status call on the NS87415 at least. Signed-off-by:
Alan Cox <alan@redhat.com> Signed-off-by:
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Jeff Garzik authored
Tackle the relatively sane complaints of checkpatch --file. The vast majority is indentation and whitespace changes, the rest are * #include fixes * printk KERN_xxx prefix addition * BSS/initializer cleanups Signed-off-by: -
Jeff Garzik authored
He now rules the world, not just this tiny tract of land. Signed-off-by: -
Jay Vosburgh authored
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:
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Jay Vosburgh authored
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:
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Jay Vosburgh authored
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:
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Jay Vosburgh authored
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:
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Jay Vosburgh authored
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:
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