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2007-07-09cmd64x: init. code cleanupSergei Shtylyov
Fix two minor issues with PCI0646 chip reporting in the init_chipset() method: "IRQ workaround enabled" message printed out not only for revision 0x01 and "CMD646: chipset revision" printed twice (by IDE core and the driver itself). Also, remove empty/pointless switch cases for the chips other than PCI0646, duplicate write to the MRDMODE register when enabling interrupts and MEMORY READ LINE cycles, and needless/misplaced initialization of the timing registers in this method. Switch to reading only the PCI revision ID register itself, not the whole 32 bits at its address in init_chipset() and init_hwif() methods; in addition, get rid of the useless clearing of hwif->autodma and perform some cosmetic style changes in the latter method. Refactor ata66_cmd64x() by moving all the code into the 'switch' statement, renaming/adding variables, and fixing the coding style. While at it, finally get rid of the meaningless aliasing register #define's... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-07-09hpt366: simplify UltraDMA filtering (take 4)Sergei Shtylyov
Simplify UltraDMA mode filtering in the driver: - make use of the newly introduced 'udma_mask' field of 'ide_pci_device_t' to set the correct hwif->ultra_mask, modifying init_setup_hpt366() to select the correct mask based on the chip revision; - replace 'max_mode' field of the 'struct hpt_info' with 'max_ultra' specifying the maximum UltraDMA mode allowed; - rewrite hpt3xx_udma_filter() to differ the filters based on the 'chip_type' field, and only use it for HPT366 and HPT370[A] where it's really necessary. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-07-09ide: use mutex instead of ide_cfg_sem semaphore in IDE driverMatthias Kaehlcke
The IDE driver uses a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-07-09ide: make void and rename ide_dma_timeout() methodSergei Shtylyov
Since ide_dma_timeout() method's result is discarded, make it return 'void'. While at it, drop 'ide_' from the method's name, drop the '__' prefix from the default method's name, and do some cleanups in this method driver-wise: - in ide-dma.c, au1xxx-ide.c, and pdc202xx_old.c, define/use 'hwif' variable; - in au1xxx-ide.c, get rid of commented out printk(); - in sl82c105.c, get rid of unnecessary variables. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-07-09ide: make void and rename ide_dma_lostirq() methodSergei Shtylyov
Since ide_dma_lostirq() method's result is discarded, make it return 'void'. While at it, rename the method to dma_lost_irq(), drop the '__' prefix from the default method's name, and do some cleanups in this method driver-wise: - in aec62xx.c, rename the method in accordance with other drivers, and get rid of unnecessary variables there; - in pdc202xx_old.c, define/use 'hwif' variable; - in sgiioc4.c, rearrange the code to call the resetproc() method directly. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-07-09serverworks: always tune CSB6Bartlomiej Zolnierkiewicz
Switch the driver to always program DMA/PIO timings and set device transfer mode instead of trusting BIOS on CSB6 controllers (libata pata_serverworks.c driver is also doing things this way and there were no problems reported so far). While doing conversion I noticed that the old code had many issues: * the code was assuming that hwif->dma_status is always valid (which obviously isn't true if hwif->dma_base == NULL) * value of "(ultra_timing >> (4*unit)) & ~(0xF0)" expression wasn't checked to fit into udma_modes[5] * code validating DMA timings didn't validate corresponding PIO timings * extra CSB5 PIO register wasn't validated et all * hwif->ide_dma_off_quietly() is always called before ide_set_dma() (which in turn calls hwif->speedproc() method - svwks_tune_chipset() in this case) so the code depending on DMA capable bit of DMA status to be set was never executed (=> the code was never validating DMA timings despite actually enabling DMA if the PIO timings were OK!) * on resume driver dependend entirely on BIOS to restore timings and set transfer mode on the device While at it: There is no need to read PIO/MWDMA timings now so don't do it. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
2007-07-09Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6: JFS: Update print_hex_dump() syntax JFS: use print_hex_dump() rather than private dump_mem() function JFS: Whitespace cleanup and remove some dead code
2007-07-09sched: add CFS creditsIngo Molnar
add credits for recent major scheduler contributions: Con Kolivas, for pioneering the fair-scheduling approach Peter Williams, for smpnice Mike Galbraith, for interactivity tuning of CFS Srivatsa Vaddagiri, for group scheduling enhancements Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: micro-optimize mmdrop()Ingo Molnar
micro-optimize mmdrop(). Improves schedule()'s assembly a bit. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: more agressive idle balancingIngo Molnar
the Linux scheduler is starving a number of workloads. So default to more agressive idle-balancing. This hurts lmbench context-switching numbers (which was the main reason we sucked at idle-balancing for such a long time) but the lmbench numbers are fine once the system is minimally utilized. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: clean up sleep_on() APIsIngo Molnar
clean up the sleep_on() APIs: - do not use fastcall - replace fragile macro magic with proper inline functions Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: style cleanupsIngo Molnar
4 small style cleanups to sched.c: checkpatch.pl is now happy about the totality of sched.c [ignoring false positives] - yay! ;-) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: do not set softirqs to nice +19Ingo Molnar
do not set softirqs to nice +19. _If_ for whatever reason we missed to process some high-prio softirq and woke up ksoftirqd, we should give it a fair chance to actually get some work done, even if the system is under load. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: simplify sched_find_first_bit()Mike Galbraith
simplify sched_rt.c's sched_find_first_bit() function: there are only 100 RT priority levels left. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add CFS documentationIngo Molnar
add Documentation/sched-design-CFS.txt Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: scheduler debugging, enable in KconfigIngo Molnar
enable CONFIG_SCHED_DEBUG in lib/Kconfig.debug. the runtime overhead of this option is very small. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: scheduler debugging, coreIngo Molnar
scheduler debugging core: implement /proc/sched_debug and /proc/<PID>/sched files for scheduler debugging. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add CFS debug sysctlsIngo Molnar
add CFS debug sysctls: only tweakable if SCHED_DEBUG is enabled. This allows for faster debugging of scheduler problems. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove old cpu accounting fieldIngo Molnar
remove the old cpu-accounting field from signal_struct, now that the code is using CFS's stats. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove unused rq types from sched.cIngo Molnar
remove unused rq types from sched.c, now that we switched over to CFS. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove batch_task()Ingo Molnar
batch_task() in sched.h is now unused - remove it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove interactivity types from sched.hIngo Molnar
remove now-unused types/fields used by the old scheduler. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove interactivity typesIngo Molnar
remove now unused interactivity-heuristics related defined and types of the old scheduler. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: clean up include files in sched.cIngo Molnar
clean up include files in sched.c, they were still old-style <asm/>. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: clean up fastcall uses of sched_fork()/sched_exit()Ingo Molnar
sched_fork()/sched_exit() does not need to specify fastcall anymore, as the x86 kernel defaults to regparm3, and no assembly code calls these functions. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: update delay-accounting to use CFS's precise statsBalbir Singh
update delay-accounting to use CFS's precise stats. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: make use of precise accounting for /proc task statsIngo Molnar
make use of CFS's precise accounting to drive /proc/<pid>/stat statistics. this code was co-authored by: Balbir Singh <balbir@linux.vnet.ibm.com> Dmitry Adamushko <dmitry.adamushko@gmail.com> Ingo Molnar <mingo@elte.hu> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
2007-07-09sched: turn on the use of unstable eventsIngo Molnar
make use of sched-clock-unstable events. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: x86, track TSC-unstable eventsIngo Molnar
track TSC-unstable events and propagate it to the scheduler code. Also allow sched_clock() to be used when the TSC is unstable, the rq_clock() wrapper creates a reliable clock out of it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs core codeIngo Molnar
apply the CFS core code. this change switches over the scheduler core to CFS's modular design and makes use of kernel/sched_fair/rt/idletask.c to implement Linux's scheduling policies. thanks to Andrew Morton and Thomas Gleixner for lots of detailed review feedback and for fixlets. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com> Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
2007-07-09sched: remove the sleep-bonus interactivity codeIngo Molnar
remove the sleep-bonus interactivity code from the core scheduler. scheduling policy is implemented in the policy modules, and CFS does not need such type of heuristics. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove expired_starving()Ingo Molnar
remove the expired_starving() heuristics from the core scheduler. CFS does not need it, and this did not really work well in practice anyway, due to the rq->nr_running multiplier to STARVATION_LIMIT. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove sleep_typeIngo Molnar
remove the sleep_type heuristics from the core scheduler - scheduling policy is implemented in the scheduling-policy modules. (and CFS does not use this type of sleep-type heuristics) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs, add load-calculation methodsIngo Molnar
add the new load-calculation methods of CFS. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: clean up __normal_prio() positionIngo Molnar
clean up: move __normal_prio() in head of normal_prio(). no code changed. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cleanup: move dequeue/enqueue_task()Ingo Molnar
cleanup: move dequeue/enqueue_task() to a more logical place, to not split up __normal_prio()/normal_prio(). Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: move around resched_task()Ingo Molnar
move resched_task()/resched_cpu() into the 'public interfaces' section of sched.c, for use by kernel/sched_fair/rt/idletask.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: remove the SleepAVG fieldIngo Molnar
remove the SleepAVG field from /proc/<pid>/status, as with the removal of the sleep-average code this value no longer makes sense. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: clean up the rt priority macrosIngo Molnar
clean up the rt priority macros, pointed out by Andrew Morton. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add cfs_rq opsIngo Molnar
add the set_task_cfs_rq() abstraction needed by CONFIG_FAIR_GROUP_SCHED. (not activated yet) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: make posix-cpu-timers use CFS's accounting informationIngo Molnar
update the posix-cpu-timers code to use CFS's CPU accounting information. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add rq_clock()/__rq_clock()Ingo Molnar
add rq_clock()/__rq_clock(), a robust wrapper around sched_clock(), used by CFS. It protects against common type of sched_clock() problems (caused by hardware): time warps forwards and backwards. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs rq data typesIngo Molnar
add the CFS rq data types to sched.c. (the old scheduler fields are still intact, they are removed by a later patch) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs, core data typesIngo Molnar
add the CFS data types to sched.h. (the old scheduler is still fully intact.) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs core, kernel/sched_idletask.cIngo Molnar
add kernel/sched_idletask.c - which implements the idle thread scheduling class. This further simplifies sched.c (under CFS), for example a number of 'if (p == rq->idle)' type of special-cases can be removed from sched.c, and schedule() gets simpler too. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs core, kernel/sched_rt.cIngo Molnar
add kernel/sched_rt.c: SCHED_FIFO/SCHED_RR support. The behavior and semantics of SCHED_FIFO/SCHED_RR tasks is unchanged. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: cfs core, kernel/sched_fair.cIngo Molnar
add kernel/sched_fair.c - which implements the bulk of CFS's behavioral changes for SCHED_OTHER tasks. see Documentation/sched-design-CFS.txt about details. Authors: Ingo Molnar <mingo@elte.hu> Dmitry Adamushko <dmitry.adamushko@gmail.com> Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Mike Galbraith <efault@gmx.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com> Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
2007-07-09sched: increase the resolution of smpniceIngo Molnar
increase SMP-nice's resolution. This is needed by CFS to implement SCHED_IDLE and cleaned up nice level support. no behavioral changes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: move code into kernel/sched_stats.hIngo Molnar
create sched_stats.h and move sched.c schedstats code into it. This cleans up sched.c a bit. no code changes are caused by this patch. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-09sched: add init_idle_bootup_task()Ingo Molnar
add the init_idle_bootup_task() callback to the bootup thread, unused at the moment. (CFS will use it to switch the scheduling class of the boot thread to the idle class) Signed-off-by: Ingo Molnar <mingo@elte.hu>
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