04 Dec, 2009
7 commits
-
o This is basic implementation of blkio controller cgroup interface. This is
the common interface visible to user space and should be used by different
IO control policies as we implement those.Signed-off-by: Vivek Goyal
Signed-off-by: Jens Axboe -
o So far we just had one cfq_group in cfq_data. To create space for more than
one cfq_group, we need to have a service tree of groups where all the groups
can be queued if they have active cfq queues backlogged in these.Signed-off-by: Vivek Goyal
Signed-off-by: Jens Axboe -
o Currently cfqq deletes a queue from service tree if it is empty (even if
we might idle on the queue). This patch keeps the queue on service tree
hence associated group remains on the service tree until we decide that
we are not going to idle on the queue and expire it.o This just helps in time accounting for queue/group and in implementation
of rest of the patches.Signed-off-by: Vivek Goyal
Signed-off-by: Jens Axboe -
o Implement a macro to traverse each service tree in the group. This avoids
usage of double for loop and special condition for idle tree 4 times.o Macro is little twisted because of special handling of idle class service
tree.Signed-off-by: Vivek Goyal
Signed-off-by: Jens Axboe -
o This patch introduce the notion of cfq groups. Soon we will can have multiple
groups of different weights in the system.o Various service trees (prioclass and workload type trees), will become per
cfq group. So hierarchy looks as follows.cfq_groups
|
workload type
|
cfq queueo When an scheduling decision has to be taken, first we select the cfq group
then workload with-in the group and then cfq queue with-in the workload
type.o This patch just makes various workload service tree per cfq group and
introduce the function to be able to choose a group for scheduling.Signed-off-by: Vivek Goyal
Signed-off-by: Jens Axboe -
o must_dispatch flag should be set only if we decided not to run the queue
and dispatch the request.Signed-off-by: Vivek Goyal
Signed-off-by: Jens Axboe -
Signed-off-by: Philipp Reisner
Signed-off-by: Lars Ellenberg
03 Dec, 2009
22 commits
-
- no one is calling wb_writeback and write_cache_pages with
wbc.nonblocking=1 any more
- lumpy pageout will want to do nonblocking writeback without the
congestion waitSo remove the congestion checks as suggested by Chris.
Signed-off-by: Wu Fengguang
Cc: Chris Mason
Cc: Jens Axboe
Cc: Trond Myklebust
Cc: Christoph Hellwig
Cc: Dave Chinner
Cc: Evgeniy Polyakov
Cc: Alex Elder
Signed-off-by: Jens Axboe -
It will lower the flush priority for NFS, and maybe more in future.
Signed-off-by: Wu Fengguang
Cc: Trond Myklebust
Cc: Jens Axboe
Cc: Christoph Hellwig
Signed-off-by: Jens Axboe -
This is dead code because no bdi flush thread will be started for
!bdi_cap_writeback_dirty bdi.Signed-off-by: Wu Fengguang
Cc: Jens Axboe
Cc: Trond Myklebust
Cc: Christoph Hellwig
Signed-off-by: Jens Axboe -
To touch task->flags directly is racy. thaw_process() still has race
(changing non_current->flags, but this is another issue) though, I think
it's much better off.So, use thaw_process() instead.
Signed-off-by: OGAWA Hirofumi
Signed-off-by: Jens Axboe -
Since commit 2f5cb7381b737e24c8046fd4aeab571fb71315f5, each queue can send
up to 4 * 4 requests if only one queue exists. I wonder why we have such limit.
Device supports tag can send more requests. For example, AHCI can send 31
requests. Test (direct aio randread) shows the limits reduce about 4% disk
thoughput.
On the other hand, since we send one request one time, if other queue
pop when current is sending more than cfq_quantum requests, current queue will
stop send requests soon after one request, so sounds there is no big latency.Signed-off-by: Shaohua Li
Signed-off-by: Jens Axboe -
The discard ioctl is used by mkfs utilities to clear a block device
prior to putting metadata down. However, not all devices return zeroed
blocks after a discard. Some drives return stale data, potentially
containing old superblocks. It is therefore important to know whether
discarded blocks are properly zeroed.Both ATA and SCSI drives have configuration bits that indicate whether
zeroes are returned after a discard operation. Implement a block level
interface that allows this information to be bubbled up the stack and
queried via a new block device ioctl.Signed-off-by: Martin K. Petersen
Signed-off-by: Jens Axboe -
request_region should be used with release_region, not request_mem_region.
Geert Uytterhoeven pointed out that in the case of drivers/video/gbefb.c,
the problem is actually the other way around; request_mem_region should be
used instead of request_region.The semantic patch that finds/fixes this problem is as follows:
(http://coccinelle.lip6.fr/)//
@r1@
expression start;
@@request_region(start,...)
@b1@
expression r1.start;
@@request_mem_region(start,...)
@depends on !b1@
expression r1.start;
expression E;
@@- release_mem_region
+ release_region
(start,E)
//Signed-off-by: Julia Lawall
Signed-off-by: Ralf Baechle -
TXx9 SPI bit rate is calculated by:
fBR = (spi-baseclk) / (n + 1)
Fix calculation of min_speed_hz, max_speed_hz and n.Signed-off-by: Atsushi Nemoto
Signed-off-by: Ralf Baechle -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
mfd: Correct WM831X_MAX_ISEL_VALUE -
These laptops often leave i8042 in a wierd state resulting in non-
operational touchpad and keyboard.Signed-off-by: Anisse Astier
Signed-off-by: Dmitry Torokhov
Signed-off-by: Linus Torvalds -
* 'for-linus' of git://neil.brown.name/md:
md: revert incorrect fix for read error handling in raid1. -
Jon confirms that recent modprobe will look in /proc/cmdline, so these
cmdline options can still be used.See http://bugzilla.kernel.org/show_bug.cgi?id=14164
Reported-by: Adam Williamson
Cc: stable@kernel.org
Signed-off-by: Rusty Russell
Signed-off-by: Linus Torvalds -
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
MIPS: RB532: Fix devices.c compilation.
MIPS: Fix MIPS I build. -
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
[PATCH] rc32434_wdt: fix compilation failure
[WATCHDOG] rc32434_wdt.c: use resource_size() -
On the parisc architecture we face for each and every loaded kernel module
this kernel "badness warning":
sysfs: cannot create duplicate filename '/module/ac97_bus/sections/.text'
Badness at fs/sysfs/dir.c:487Reason for that is, that on parisc all kernel modules do have multiple
.text sections due to the usage of the -ffunction-sections compiler flag
which is needed to reach all jump targets on this platform.An objdump on such a kernel module gives:
Sections:
Idx Name Size VMA LMA File off Algn
0 .note.gnu.build-id 00000024 00000000 00000000 00000034 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
1 .text 00000000 00000000 00000000 00000058 2**0
CONTENTS, ALLOC, LOAD, READONLY, CODE
2 .text.ac97_bus_match 0000001c 00000000 00000000 00000058 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
3 .text 00000000 00000000 00000000 000000d4 2**0
CONTENTS, ALLOC, LOAD, READONLY, CODE
...
Since the .text sections are empty (size of 0 bytes) and won't be
loaded by the kernel module loader anyway, I don't see a reason
why such sections need to be listed under
/sys/module//sections/ either.The attached patch does solve this issue by not exporting section
names which are empty.This fixes bugzilla http://bugzilla.kernel.org/show_bug.cgi?id=14703
Signed-off-by: Helge Deller
CC: rusty@rustcorp.com.au
CC: akpm@linux-foundation.org
CC: James.Bottomley@HansenPartnership.com
CC: roland@redhat.com
CC: dave@hiauly1.hia.nrc.ca
Signed-off-by: Linus Torvalds -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6:
regulator: Initialise wm831x structure pointor for ISINK driver -
The version that made it into mainline missed the initialisation of the
chip handle.Signed-off-by: Mark Brown
Signed-off-by: Liam Girdwood -
We should now use dev_set_drvdata to set the driver driver_data field.
Signed-off-by: Florian Fainelli
Patchwork: http://patchwork.linux-mips.org/patch/747/
Signed-off-by: Ralf Baechle -
Broken by d63c63e889bbeeaa461a8addf1245f89f3ce4ece (lmo) rsp.
f1e39a4a616cd9981a9decfd5332fd07a01abb8b (kernel.org).Signed-off-by: Ralf Baechle
Patchwork: http://patchwork.linux-mips.org/patch/746/ -
* 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6:
[ARM] pxamci: call mmc_remove_host() before freeing resources
02 Dec, 2009
11 commits
-
mmc_remove_host() will cause the mmc core to switch off the bus power by
eventually calling pxamci_set_ios(). This function uses the regulator or
the GPIO which have been freed already.This causes the following Oops on module unload.
[ 49.519649] Unable to handle kernel paging request at virtual address 30303a70
[ 49.526878] pgd = c7084000
[ 49.529563] [30303a70] *pgd=00000000
[ 49.533136] Internal error: Oops: 5 [#1]
[ 49.537025] last sysfs file: /sys/devices/platform/pxa27x-ohci/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/scsi_level
[ 49.547471] Modules linked in: pxamci(-) eeti_ts
[ 49.552061] CPU: 0 Not tainted (2.6.32-rc8 #322)
[ 49.557001] PC is at regulator_is_enabled+0x3c/0xbc
[ 49.561846] LR is at regulator_is_enabled+0x30/0xbc
[ 49.566691] pc : [] lr : [] psr: 60000013
[ 49.566702] sp : c7083e70 ip : 30303a30 fp : 00000000
[ 49.578093] r10: c705e200 r9 : c7082000 r8 : c705e2e0
[ 49.583280] r7 : c7061340 r6 : c7061340 r5 : c7083e70 r4 : 00000000
[ 49.589759] r3 : c04dc434 r2 : c04dc434 r1 : c03eecea r0 : 00000047
[ 49.596241] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
[ 49.603329] Control: 0000397f Table: a7084018 DAC: 00000015
[ 49.609031] Process rmmod (pid: 1101, stack limit = 0xc7082278)
[ 49.614908] Stack: (0xc7083e70 to 0xc7084000)
[ 49.619238] 3e60: c7082000 c703c4f8 c705ea00 c04f4074
[ 49.627366] 3e80: 00000000 c705e3a0 ffffffff c0247ddc c70361a0 00000000 c705e3a0 ffffffff
[ 49.635499] 3ea0: c705e200 bf006400 c78c4f00 c705e200 c705e3a0 ffffffff c705e200 ffffffff
[ 49.643633] 3ec0: c04d8ac8 c02476d0 ffffffff c0247c60 c705e200 c0248678 c705e200 c0249064
[ 49.651765] 3ee0: ffffffff bf006204 c04d8ad0 c04d8ad0 c04d8ac8 bf007490 00000880 c00440c4
[ 49.659898] 3f00: 0000b748 c01c5708 bf007490 c01c44c8 c04d8ac8 c04d8afc bf007490 c01c4570
[ 49.668031] 3f20: bf007490 bf00750c c04f4258 c01c37a4 00000000 bf00750c c7083f44 c007b014
[ 49.676162] 3f40: 4000d000 6d617870 08006963 00000001 00000000 c7085000 00000001 00000000
[ 49.684287] 3f60: 4000d000 c7083f8c 00000001 bea01a54 00005401 c7ab1400 c00440c4 00082000
[ 49.692420] 3f80: bf00750c 00000880 c7083f8c 00000000 4000cfa8 00000000 00000880 bea01cc8
[ 49.700552] 3fa0: 00000081 c0043f40 00000000 00000880 bea01cc8 00000880 00000006 00000000
[ 49.708677] 3fc0: 00000000 00000880 bea01cc8 00000081 00000097 0000cca4 0000b748 00000000
[ 49.716802] 3fe0: 4001a4f0 bea01cc0 00018bf4 4001a4fc 20000010 bea01cc8 a063e021 a063e421
[ 49.724958] [] (regulator_is_enabled+0x3c/0xbc) from [] (mmc_regulator_set_ocr+0x14/0xd8)
[ 49.734836] [] (mmc_regulator_set_ocr+0x14/0xd8) from [] (pxamci_set_ios+0xd8/0x17c [pxamci])
[ 49.745044] [] (pxamci_set_ios+0xd8/0x17c [pxamci]) from [] (mmc_power_off+0x50/0x58)
[ 49.754555] [] (mmc_power_off+0x50/0x58) from [] (mmc_detach_bus+0x68/0xc4)
[ 49.763207] [] (mmc_detach_bus+0x68/0xc4) from [] (mmc_stop_host+0xd4/0x1bc)
[ 49.771944] [] (mmc_stop_host+0xd4/0x1bc) from [] (mmc_remove_host+0xc/0x20)
[ 49.780681] [] (mmc_remove_host+0xc/0x20) from [] (pxamci_remove+0xc8/0x174 [pxamci])
[ 49.790211] [] (pxamci_remove+0xc8/0x174 [pxamci]) from [] (platform_drv_remove+0x1c/0x24)
[ 49.800164] [] (platform_drv_remove+0x1c/0x24) from [] (__device_release_driver+0x7c/0xc4)
[ 49.810110] [] (__device_release_driver+0x7c/0xc4) from [] (driver_detach+0x60/0x8c)
[ 49.819535] [] (driver_detach+0x60/0x8c) from [] (bus_remove_driver+0x90/0xcc)
[ 49.828452] [] (bus_remove_driver+0x90/0xcc) from [] (sys_delete_module+0x1d8/0x254)
[ 49.837891] [] (sys_delete_module+0x1d8/0x254) from [] (ret_fast_syscall+0x0/0x28)
[ 49.847145] Code: eb06c53a e596c030 e1a0500d e59f106c (e59c0040)
[ 49.853566] ---[ end trace b5fa66a00cea142f ]---Signed-off-by: Daniel Mack
Reported-by: Sven Neumann
Cc: Pierre Ossman
Cc: linux-mmc@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: stable@kernel.org
Signed-off-by: Eric Miao -
This patch fixes the compilation failure of
rc32434 due to a bad module parameter description.Signed-off-by: Florian Fainelli
Signed-off-by: Wim Van Sebroeck -
The size value passed to ioremap_nocache() is not correct.
Use resource_size() to get the correct value.Signed-off-by: H Hartley Sweeten
Cc: Phil Sutter
Signed-off-by: Wim Van Sebroeck -
The SYSFS_DEPRECATED_V2 says "remove" older, deprecated features, but it
actually enables them, so correct this confusing, backwards text.Signed-off-by: Randy Dunlap
Cc: Kay Sievers
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When detecting power failure, the probe function would reset the clock
time to defined state.However, the clock's _date_ might still be bogus and a subsequent probe
fails when sanity-checking these values.Change the power-failure fixup code to do a full setting of rtc_time,
including a valid date.Signed-off-by: Johannes Weiner
Cc: Alessandro Zummo
Cc: Paul Gortmaker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The possible CCR_Y2K register values are 19 or 20 and struct rtc_time's
tm_year is in years since 1900.The function translating rtc_time to register values assumes tm_year to be
years since first christmas, though, and we end up storing 0 or 1 in the
CCR_Y2K register, which the hardware does not refuse to do.A subsequent probing of the clock fails due to the invalid value range in
the register, though.[ And if it didn't, reading the clock would yield a bogus year because
the function translating registers to tm_year is assuming a register
value of 19 or 20. ]This fixes the conversion from years since 1900 in tm_year to the
corresponding CCR_Y2K value of 19 or 20.Signed-off-by: Johannes Weiner
Cc: Alessandro Zummo
Cc: Paul Gortmaker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Prevent the AoE block driver from creating cache aliases of page cache
pages on machines with virtually indexed caches.Building kernels on an AT91SAM9G20 board without this patch fails with
segmentation faults after a couple of passes.Signed-off-by: Peter Horton
Cc: "Ed L. Cashin"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- Remove wrong and unnecessary unmask operation
- Remove extra GEDR reading
This fixes the loss of interrupts which occurs when two or more pins are
triggered in close succession.Signed-off-by: Alek Du
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It has been fun but the last year or more it has been a duty and a burden.
So I leave it open for others to take over.Signed-off-by: Sam Ravnborg
Cc: Anibal Monsalve Salazar
Cc: Steven Rostedt
Cc: Michal Marek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Following issues have been addressed on DA8XX/OMAP-L1XX:
a. Screen misalignment during booting when frame buffer console is
enabled.b. Driver was configured always in PSEUDOCOLOR mode. This patch
dynamically configures the driver either in PSEUDOCOLOUR or TRUECOLOR
mode depending on bpp.c. The RED and BLUE offsets were interchanged resulting in wrong
bootup logo colour.This patch has been tested on DA830/OMAP-L137 and DA850/OMAP-L138 EVMs.
Signed-off-by: Sudhakar Rajashekhara
Cc: Steve Chen
Cc: Pavel Kiryukhin
Cc: Krzysztof Helt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
"rtc" is freed and then dereferenced on the next line. This patch fixes
that.Signed-off-by: Dan Carpenter
Acked-by: Alessandro Zummo
Cc: David Brownell
Cc: Paul Gortmaker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
