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2007-04-30cfq-iosched: speedup cic rb lookupJens Axboe1-2/+18
We often lookup the same queue many times in succession, so cache the last looked up queue to avoid browsing the rbtree. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30ll_rw_blk: add io_context private pointerJens Axboe2-0/+2
To be used by as/cfq as they see fit. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: get rid of cfqq hashVasily Tarasov1-100/+67
cfq hash is no more necessary. We always can get cfqq from io context. cfq_get_io_context_noalloc() function is introduced, because we don't want to allocate cic on merging and checking may_queue. In order to identify sync queue we've used hash key = CFQ_KEY_ASYNC. Since hash is eliminated we need to use other criterion: sync flag for queue is added. In all places where we dig in rb_tree we're in current context, so no additional locking is required. Advantages of this patch: no additional memory for hash, no seeking in hash, code is cleaner. But it is necessary now to seek cic in per-ioc rbtree, but it is faster: - most processes work only with few devices - most systems have only few block devices - it is a rb-tree Signed-off-by: Vasily Tarasov <vtaras@openvz.org> Changes by me: - Merge into CFQ devel branch - Get rid of cfq_get_io_context_noalloc() - Fix various bugs with dereferencing cic->cfqq[] with offset other than 0 or 1. - Fix bug in cfqq setup, is_sync condition was reversed. - Fix bug where only bio_sync() is used, we need to check for a READ too Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: tighten queue request overlap conditionJens Axboe1-1/+2
For tagged devices, allow overlap of requests if the idle window isn't enabled on the current active queue. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: improve sync vs async workloadsJens Axboe1-13/+18
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: never allow an async queue idlingJens Axboe1-1/+6
We don't enable it by default, don't let it get enabled during runtime. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: get rid of ->dispatch_sliceJens Axboe1-5/+1
We can track it fairly accurately locally, let the slice handling take care of the rest. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: don't pass unused preemption variable aroundJens Axboe1-15/+13
We don't use it anymore in the slice expiry handling. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: get rid of ->cur_rr and ->cfq_listJens Axboe1-55/+32
It's only used for preemption now that the IDLE and RT queues also use the rbtree. If we pass an 'add_front' variable to cfq_service_tree_add(), we can set ->rb_key to 0 to force insertion at the front of the tree. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: slice offset should take ioprio into accountJens Axboe1-1/+2
Use the max_slice-cur_slice as the multipler for the insertion offset. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30[PATCH] cfq-iosched: style cleanups and commentsJens Axboe1-16/+50
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: sort IDLE queues into the rbtreeJens Axboe1-36/+31
Same treatment as the RT conversion, just put the sorted idle branch at the end of the tree. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: sort RT queues into the rbtreeJens Axboe1-15/+12
Currently CFQ does a linked insert into the current list for RT queues. We can just factor the class into the rb insertion, and then we don't have to treat RT queues in a special way. It's faster, too. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30[PATCH] cfq-iosched: speed up rbtree handlingJens Axboe1-14/+48
For cases where the rbtree is mainly used for sorting and min retrieval, a nice speedup of the rbtree code is to maintain a cache of the leftmost node in the tree. Also spotted in the CFS CPU scheduler code. Improved by Alan D. Brunelle <Alan.Brunelle@hp.com> by updating the leftmost hint in cfq_rb_first() if it isn't set, instead of only updating it on insert. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: rework the whole round-robin list conceptJens Axboe1-238/+123
Drawing on some inspiration from the CFS CPU scheduler design, overhaul the pending cfq_queue concept list management. Currently CFQ uses a doubly linked list per priority level for sorting and service uses. Kill those lists and maintain an rbtree of cfq_queue's, sorted by when to service them. This unfortunately means that the ionice levels aren't as strong anymore, will work on improving those later. We only scale the slice time now, not the number of times we service. This means that latency is better (for all priority levels), but that the distinction between the highest and lower levels aren't as big. The diffstat speaks for itself. cfq-iosched.c | 363 +++++++++++++++++--------------------------------- 1 file changed, 125 insertions(+), 238 deletions(-) Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: minor updatesJens Axboe1-63/+18
- Move the queue_new flag clear to when the queue is selected - Only select the non-first queue in cfq_get_best_queue(), if there's a substantial difference between the best and first. - Get rid of ->busy_rr - Only select a close cooperator, if the current queue is known to take a while to "think". Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: development updateJens Axboe1-120/+261
- Implement logic for detecting cooperating processes, so we choose the best available queue whenever possible. - Improve residual slice time accounting. - Remove dead code: we no longer see async requests coming in on sync queues. That part was removed a long time ago. That means that we can also remove the difference between cfq_cfqq_sync() and cfq_cfqq_class_sync(), they are now indentical. And we can kill the on_dispatch array, just make it a counter. - Allow a process to go into the current list, if it hasn't been serviced in this scheduler tick yet. Possible future improvements including caching the cfqq lookup in cfq_close_cooperator(), so we don't have to look it up twice. cfq_get_best_queue() should just use that last decision instead of doing it again. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30cfq-iosched: improve preemption for cooperating tasksJens Axboe1-6/+20
When testing the syslet async io approach, I discovered that CFQ sometimes didn't perform as well as expected. cfq_should_preempt() needs to better check for cooperating tasks, so fix that by allowing preemption of an equal priority queue if the recently queued request is as good a candidate for IO as the one we are currently waiting for. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-04-30[POWERPC] Remove dev_dbg redefinition in drivers/ps3/vuart.cPaul Mackerras1-8/+0
Commit 404d5b185b4eb56d6fa2f7bd27833f8df1c38ce4 changed the definition of dev_dbg in the !DEBUG case from being a #define to being a static inline. There was code in drivers/ps3/vuart.c to do exactly that, which fails to compile now. This fixes it by removing the redefinition, as the redefinition is now superfluous. Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30Merge branch 'linux-2.6' into for-2.6.22Paul Mackerras1949-76186/+101007
2007-04-30[POWERPC] remove kernel module option for booke wdtDave Jiang1-1/+1
Remove option of making booke_wdt into a kernel module. This watchdog cannot be disabled. No point being a kernel module. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Avoid putting cpu node twiceJohn Rigby1-2/+4
Call of_find_node_by_type with NULL instead of np so the cpu node does not get put twice. This was causing kref_put warnings. Signed-off-by: John Rigby <jrigby@freescale.com> Acked-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Spinlock initializer cleanupThomas Gleixner4-4/+4
Use DEFINE_SPINLOCK instead of initializing spinlocks to SPIN_LOCK_UNLOCKED, since DEFINE_SPINLOCK is better for lockdep. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] ppc4xx_sgdma needs dma-mapping.hAndrew Morton1-0/+1
For dma_alloc_*() Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] arch/powerpc/sysdev/timer.c build fixSrinivasa Ds1-0/+1
arch/powerpc/sysdev/timer.c:51: error: variable `timer_sysclass' has initializer but incomplete type arch/powerpc/sysdev/timer.c:52: error: unknown field `resume' specified in initializer <etc> Signed-off-by: Srinivasa Ds <srinivasa@in.ibm.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] get_property cleanupsStephen Rothwell4-14/+15
Just another pass through arch/powerpc for old usages. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Remove the unused HTDMSOUND driverAdrian Bunk8-3054/+1
Recently, someone fixed a syntax error in the HTDMSOUND driver introduced 4 years ago. Unfortunately not by trying to compile this driver for his hardware but by code inspection - which seems to be a strong indication that there are no users left for this OSS sound driver. This patch therefore removes it. Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Dan Malek <dan@embeddedalley.com> Acked-by: Marcelo Tosatti <marcelo@kvack.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] cell: cbe_cpufreq cleanup and crash fixOlof Johansson1-10/+14
cbe_cpufreq cleanups: * comment format * whitespace * don't init on non-cell platforms Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Christian Krafft <krafft@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Declare enable_kernel_spe in a headerJohannes Berg1-0/+1
This patch puts enable_kernel_spe into <asm-powerpc/system.h> along with enable_kernel_altivec etc. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Add dt_xlate_addr() to bootwrapperMark A. Greer2-16/+35
dt_xlate_reg() looks up the 'reg' property in the specified node to get the address and size to translate. Add dt_xlate_addr() which is passed in the address and size to translate. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] bootwrapper: CONFIG_ -> CONFIG_DEVICE_TREEScott Wood1-1/+1
A usage of CONFIG_DEVICE_TREE got accidentally truncated; this fix allows out-of-tree dts files to work. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Don't define a custom bd_t for Xilixn Virtex based boards.Grant Likely1-14/+1
Why create a platform specific board_info structure that is hacked together, ugly, and dangerous, when we've got a perfectly fine common board_info structure that is hacked-together, ugly and dangerous. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Add sane defaults for Xilinx EDK generated xparameters filesGrant Likely1-0/+60
Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Add uartlite boot console driver for the zImage wrapperGrant Likely3-5/+48
Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Stop using ppc_sys for Xilinx Virtex boardsGrant Likely7-187/+11
The arch/ppc/syslib/ppc_sys.c infrastructure does not work well for the virtex ports. Move the ml300 and ml403 board ports over to use the new virtex_devices infrastructure. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] New registration for common Xilinx Virtex ppc405 platform devicesGrant Likely2-0/+260
Currently virtex support in mainline make use of the infrastructure in arch/ppc/syslib/ppc_sys.c for registering common devices on virtex ppc405 platforms. The ppc_sys.c code is not well suited to the dynamic nature of FPGA designs and makes adding new board ports more complex. This patch adds a new listing of common devices which does not depend on the ppc_sys.c infrastructure. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Merge common virtex header filesGrant Likely6-111/+33
The header files for the ml403 and ml300 are virtually identical, merge them into a single file. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Rework Kconfig dependancies for Xilinx Virtex ppc405 platformGrant Likely1-8/+7
Reverse dependency order for Xilinx Virtex parts. For these parts, It makes more sense for boards/chips to specify which features they provide instead of the features listing the parts they are implemented in. I think it also makes adding new board ports simpler. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30[POWERPC] Clean up cpufreq Kconfig dependenciesOlof Johansson1-6/+6
Shuffle Kconfig order, making the platform drivers menu depend on the global option instead of each driver being dependent on it. Also fix dependency of PPC_PMAC on the G5 one. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-30Revert "[POWERPC] Autodetect serial console on efika"Paul Mackerras1-26/+0
This reverts commit 9414715a7bbb45450015e9bc2676d85d919d08d4, at Olaf Hering's request: > Paul, please discard this patch. The optional graphics card may have > also device_type 'serial' if it is in VGA mode. > I will send an updated patch later.
2007-04-30ieee1394: remove garbage from KconfigStefan Richter1-2/+0
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-30ieee1394: more help in KconfigStefan Richter1-8/+12
- s/Device Drivers/Controllers/ - clarify who needs pcilynx - don't recommend Y for raw1394; M is typically used Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-30ieee1394: ohci1394: Fix mistake in printk message.Simon Arlott1-1/+1
Fix the "attempting to setting" message in ohci1394. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-30ieee1394: ohci1394: remove unnecessary rcvPhyPkt bit flipping in LinkControl ↵Bernhard Kauer1-6/+2
register Remove the unneeded code that clears, sets and again clears the rcvPhyPkt bit in the ohci1394 LinkControl register in ohci_initialize(). Signed-off-by: Bernhard Kauer <kauer@os.inf.tu-dresden.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-30ieee1394: ohci1394: fix cosmetic problem in error loggingStefan Richter1-0/+1
If posted write failed, an "Unhandled interrupt(s) 0x00000100" message was logged by mistake. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-30ieee1394: eth1394: send async streams at S100 on 1394b busesStefan Richter1-5/+13
eth1394 did not work on buses consisting of S100B...S400B hardware because it attempted to send GASP packets at S800. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-30ieee1394: eth1394: fix error path in module_initAkinobu Mita1-3/+12
This patch fixes some error handlings in eth1394: - check return value of kmem_cache_create() - cleanup resources if hpsb_register_protocol() fails Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (whitespace)
2007-04-30ieee1394: eth1394: correct return codes in hard_start_xmitStefan Richter1-18/+16
This patch actually doesn't change anything because there was always 0 == NETDEV_TX_OK returned before. TODO: Return NETDEV_TX_BUSY in error case and test in different error conditions. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-30ieee1394: eth1394: hard_start_xmit is called in atomic contextStefan Richter1-3/+2
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-30ieee1394: eth1394: some conditions are unlikelyStefan Richter1-4/+4
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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