* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block:
[PATCH] elevator: elv_list_lock does not need irq disabling
[BLOCK] Don't pin lots of memory in mempools
cfq-iosched: speedup cic rb lookup
ll_rw_blk: add io_context private pointer
cfq-iosched: get rid of cfqq hash
cfq-iosched: tighten queue request overlap condition
cfq-iosched: improve sync vs async workloads
cfq-iosched: never allow an async queue idling
cfq-iosched: get rid of ->dispatch_slice
cfq-iosched: don't pass unused preemption variable around
cfq-iosched: get rid of ->cur_rr and ->cfq_list
cfq-iosched: slice offset should take ioprio into account
[PATCH] cfq-iosched: style cleanups and comments
cfq-iosched: sort IDLE queues into the rbtree
cfq-iosched: sort RT queues into the rbtree
[PATCH] cfq-iosched: speed up rbtree handling
cfq-iosched: rework the whole round-robin list concept
cfq-iosched: minor updates
cfq-iosched: development update
cfq-iosched: improve preemption for cooperating tasks
Currently we scale the mempool sizes depending on memory installed
in the machine, except for the bio pool itself which sits at a fixed
256 entry pre-allocation.
There's really no point in "optimizing" this OOM path, we just need
enough preallocated to make progress. A single unit is enough, lets
scale it down to 2 just to be on the safe side.
This patch saves ~150kb of pinned kernel memory on a 32-bit box.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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>
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>
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>
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>
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>
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>
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>
- 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>
- 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>
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>
Commit 404d5b185b 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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
This reverts commit 9414715a7b,
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.
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (107 commits)
smc911x: fix compilation breakage wjen debug is on
[netdrvr] eexpress: minor corrections
add NAPI support to sb1250-mac.c
ixgb: ROUND_UP macro cleanup in drivers/net/ixgb
e1000: ROUND_UP macro cleanup in drivers/net/e1000
Generic HDLC sparse annotations
e100: Optionally use I/O mode only to access register space
e100: allow bad MAC address when running with invalid eeprom csum
ehea: fix for dlpar support
ehea: fix for sysfs entries
3C509: Remove unnecessary include of <linux/pm_legacy.h>
NetXen: Fix for vmalloc issues
NetXen: Fixes for Power PC architecture
NetXen: Port swap feature for multi port cards
NetXen: Removal of redundant macros
NetXen: Multi PCI support for Quad cards
NetXen: Removal of redundant argument passing
NetXen: Use multiple PCI functions
[netdrvr e100] experiment with doing RX in a similar manner to eepro100
[PATCH] ieee80211: add missing global needed by IEEE80211_DEBUG_XXXX
...
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev: (86 commits)
SPIN_LOCK_UNLOCKED cleanup in drivers/ata/pata_winbond.c
drivers/ata/pata_cmd640.c: fix build with CONFIG_PM=n
pata_hpt37x: Further small fixes
pata_hpt3x2n: Add HPT371N support and other bits
ata: printk warning fixes
libata: separate ATA_EHI_DID_RESET into DID_SOFTRESET and DID_HARDRESET
ahci: consolidate common port flags
ata_timing: ensure t->cycle is always correct
libata: add missing call to ->cable_detect() in new EH path
pata_amd: remove contamination added during cable_detect conversion
libata: Handle drives that require a spin-up command before first access
libata: HPA support
libata: kill probe_ent and related helpers
libata: convert the remaining PATA drivers to new init model
libata: convert the remaining SATA drivers to new init model
libata: convert ata_pci_init_native_mode() users to new init model
libata: convert drivers with combined SATA/PATA ports to new init model
libata: add init helpers including ata_pci_prepare_native_host()
libata: convert native PCI host handling to new init model
libata: convert legacy PCI host handling to new init model
...
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (105 commits)
sonypi: use mutex instead of semaphore
sony-laptop: remove user visible camera controls as platform attributes
meye: make meye use sony-laptop instead of sonypi
sony-laptop: add a meye-usable include file for camera ops
sony-laptop: complete the motion eye camera support in sony-laptop
sonypi: try to detect if sony-laptop has already taken one of the known ioports
sonypi: suggest sonypi users to try sony-laptop instead
sony-laptop: add edge modem support (also called WWAN)
sony-laptop: add locking on accesses to the ioport and global vars
sony-laptop: add camera enable/disable parameter, better handle possible infinite loop
thinkpad-acpi: make drivers/misc/thinkpad_acpi:fan_mutex static
ACPI: thinkpad-acpi: add sysfs support to wan and bluetooth subdrivers
ACPI: thinkpad-acpi: add sysfs support to hotkey subdriver
ACPI: thinkpad-acpi: improve dock subdriver initialization
ACPI: thinkpad-acpi: improve debugging for acpi helpers
ACPI: thinkpad-acpi: improve fan control documentation
ACPI: thinkpad-acpi: map ENXIO to EINVAL for fan sysfs
ACPI: thinkpad-acpi: fix a fan watchdog invocation
ACPI: thinkpad-acpi: do not arm fan watchdog if it would not work
ACPI: thinkpad-acpi: add a fan-control feature master toggle
...
