From: Tomoki Sekiyama
On some architectures such as arm64, siano chip based TV-tuner
USB devices are not recognized correctly due to coherent memory
allocation failure with the following error:
[ 663.556135] usbcore: deregistering interface driver smsusb
[ 683.624809] smsusb:smsusb_probe
From: Tomoki Sekiyama
On some architectures such as arm64, siano chip based TV-tuner
USB devices are not recognized correctly due to coherent memory
allocation failure with the following error:
[ 663.556135] usbcore: deregistering interface driver smsusb
[ 683.624809] smsusb:smsusb_probe
DMA
memory allocation for USB devices in such architectures.
Signed-off-by: Tomoki Sekiyama
---
drivers/media/common/siano/smscoreapi.c | 34 +++--
drivers/media/common/siano/smscoreapi.h | 2 ++
drivers/media/usb/siano/smsusb.c| 1 +
3 files changed, 27
Currently sched_out_state() converts the prev_state u64 bitmask to a char
using the bitmask as an index, which may cause invalid memory access.
This fixes the issue by using the __ffs() returned value as an index.
Signed-off-by: Tomoki Sekiyama
Fixes: cdce9d738b91e ("perf sched: Add
hed/wait: Introduce TASK_NOLOAD and TASK_IDLE"):
Introduces new state 'N'
- commit 7dc603c9028e ("sched/fair: Fix PELT integrity for new tasks"):
Introduces new state 'n'
Signed-off-by: Tomoki Sekiyama
Cc: Jiri Olsa
Cc: David Ahern
Cc: Namhyung Kim
Cc
Currently sched_out_state() converts the prev_state u64 bitmask to a char
using the bitmask as an index, which may cause invalid memory access.
This fixes the issue by using the __ffs() returned value as an index.
Signed-off-by: Tomoki Sekiyama
Fixes: cdce9d738b91e ("perf sched: Add
Update TASK_STATE_TO_CHAR_STR macro to one from sched.h in the latest
kernel, where 'N' and 'n' are introduced, 'X' and 'Z' are swapped.
Signed-off-by: Tomoki Sekiyama
Fixes: cdce9d738b91e ("perf sched: Add sched latency profiling")
Cc: Jiri
ruct thread *thread)
>> +return bit < sizeof(str) - 1 ? str[bit] : '?';
>
> You'd better use ARRAY_SIZE(str) instead of sizeof() for array here.
OK, will change this to use ARRAY_SIZE on the next update.
Thanks,
Tomoki Sekiyama
sched_out_state() converts the prev_state u64 bitmask to a char in
a wrong way, which may cause invalid memory access.
TASK_STATE_TO_CHAR_STR should also be fixed to adapt current
kernel's sched.h.
Signed-off-by: Tomoki Sekiyama
Cc: Jiri Olsa
Cc: David Ahern
Cc: Namhyung Kim
Cc:
-------
yes:14187 |499.705 ms | 39 | avg: 12.838 ms |
yes:14188 |500.350 ms | 40 | avg: 12.506 ms |
gnome-terminal-:12722 | 0.285 ms |3 | avg:0.025 ms |
...
Thanks,
Tomoki Sekiyama
sched_out_state() converts the prev_state u64 bitmask to a char in
a wrong way, which may cause wrong results of 'perf sched latency'.
This patch fixes the conversion.
Also, preempted tasks must be considered that they are in the
THREAD_WAIT_CPU state.
Signed-off-by: Tomoki Sekiyama
sched_out_state() converts the prev_state u64 bitmask to a char in
a wrong way, which may cause wrong results of 'perf sched latency'.
This patch fixes the conversion.
Signed-off-by: Tomoki Sekiyama
Cc: Jiri Olsa
Cc: David Ahern
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Masami
sched_out_state() converts the prev_state u64 bitmask to a char in
a wrong way, which may cause wrong results of 'perf sched latency'.
This patch fixes the conversion.
Signed-off-by: Tomoki Sekiyama
Cc: Jiri Olsa
Cc: David Ahern
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Masami
. This
patch removes '__init' to boot the guest successfully with 'console=hvc0'.
Signed-off-by: Tomoki Sekiyama
---
drivers/tty/hvc/hvc_console.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_conso
. This
patch removes '__init' to boot the guest successfully with 'console=hvc0'.
Signed-off-by: Tomoki Sekiyama
---
drivers/tty/hvc/hvc_console.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_conso
Hi all,
Is this patchset going to be merged into 3.12?
Thanks,
--
Tomoki
On 9/23/13 16:14 , "Tejun Heo" wrote:
>Hello,
>
>On Mon, Sep 23, 2013 at 08:11:55PM +0000, Tomoki Sekiyama wrote:
>> >Hmm... why aren't we just changing elevator_init() to gr
Hi Tejun,
Thank you for the review.
On 9/22/13 13:04 , "Tejun Heo" wrote:
>On Fri, Aug 30, 2013 at 06:47:07PM -0400, Tomoki Sekiyama wrote:
>> @@ -739,9 +739,17 @@ blk_init_allocated_queue(struct request_queue *q,
>>request_fn_proc *rfn,
>>
>&g
Ping: any comments for this series?
On 8/30/13 18:47 , "Tomoki Sekiyama" wrote:
>The soft lockup below happens at the boot time of the system using dm
>multipath and the udev rules to switch scheduler.
>
>[ 356.127001] BUG: soft lockup - CPU#3 stuck for 22s! [sh:483]
>
ock is already taken by elv_iosched_store().
Signed-off-by: Tomoki Sekiyama
---
block/elevator.c | 16 ++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/block/elevator.c b/block/elevator.c
index 02d4390..6d765f7 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@
isition of q->sysfs_lock around elevator_init()
into blk_init_allocated_queue(), to provide mutual exclusion between
initialization of the q->scheduler and switching of the scheduler.
This should fix this bugzilla:
https://bugzilla.redhat.com/show_bug.cgi?id=902012
Signed-off-by: Tomoki Sekiyama
On 8/29/13 16:29 , "Vivek Goyal" wrote:
>On Mon, Aug 26, 2013 at 09:45:15AM -0400, Tomoki Sekiyama wrote:
>> The soft lockup below happes at the boot time of the system using dm
>> multipath and automated elevator switching udev rules.
>>
>> [ 356.127001] B
On 8/29/13 14:43 , "Vivek Goyal" wrote:
>On Thu, Aug 29, 2013 at 02:33:10PM -0400, Vivek Goyal wrote:
>> On Mon, Aug 26, 2013 at 09:45:15AM -0400, Tomoki Sekiyama wrote:
>> > The soft lockup below happes at the boot time of the system using dm
>> > multipath
Hi vivek,
Thanks for your comments.
On 8/29/13 14:33 , "Vivek Goyal" wrote:
>On Mon, Aug 26, 2013 at 09:45:15AM -0400, Tomoki Sekiyama wrote:
>> The soft lockup below happes at the boot time of the system using dm
>> multipath and automated elevator switching udev ru
nd hang up
This patch adds acquisition of q->sysfs_lock in blk_init_allocated_queue().
This also adds the lock into elevator_change() to ensure locking from the
other path, as it is exposed function (and queue_attr_store will uses
__elevator_change() now, the non-locking version of elevator_cha
On 8/1/13 17:04 , "Jens Axboe" wrote:
>On 08/01/2013 02:28 PM, Tomoki Sekiyama wrote:
>> On 7/30/13 10:09 PM, Shaohua Li wrote:
>>> On Tue, Jul 30, 2013 at 03:30:33PM -0400, Tomoki Sekiyama wrote:
>>>> Hi,
>>>>
>>>> When some a
On 7/30/13 10:09 PM, Shaohua Li wrote:
> On Tue, Jul 30, 2013 at 03:30:33PM -0400, Tomoki Sekiyama wrote:
>> Hi,
>>
>> When some application launches several hundreds of processes that issue
>> only a few small sync I/O requests, CFQ may cause heavy latencies
>&g
, avg=110236.79, stdev=303351.72
Average latency is reduced by 80%, and max is also reduced by 56%.
Any comments are appreciated.
Signed-off-by: Tomoki Sekiyama
---
block/cfq-iosched.c | 36 +++-
1 file changed, 31 insertions(+), 5 deletions(-)
diff --git a/block
Hi Paul,
Thank you for your comments, and sorry for my late reply.
On 2012/09/21 2:34, Paul E. McKenney wrote:
> On Thu, Sep 06, 2012 at 08:27:40PM +0900, Tomoki Sekiyama wrote:
>> Initialize rcu related variables to avoid warnings about RCU usage while
>> slave CPUs is ru
Commit-ID: fd0f5869724ff6195c6e7f12f8287c66a132e0ba
Gitweb: http://git.kernel.org/tip/fd0f5869724ff6195c6e7f12f8287c66a132e0ba
Author: Tomoki Sekiyama
AuthorDate: Wed, 26 Sep 2012 11:11:28 +0900
Committer: H. Peter Anvin
CommitDate: Thu, 27 Sep 2012 22:52:34 -0700
x86: Distinguish TLB
Hi Alex,
On 2012/09/25 11:57, Alex Shi wrote:
> On 09/24/2012 09:37 AM, Alex Shi wrote:
>
>> On 09/20/2012 04:50 PM, Tomoki Sekiyama wrote:
>>
>>> unsigned int irq_resched_count;
>>> unsigned int irq_call_count;
>>> + /* irq_tlb_count is do
ION_VECTOR").
This patch reverts TLB shootdowns entry in /proc/interrupts to count TLB
shootdowns separately from the other function call interrupts.
Signed-off-by: Tomoki Sekiyama
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Alex Shi
---
arch/x86/inclu
This patch reverts TLB shootdowns entry in /proc/interrupts to count TLB
shootdowns separately from the other function call interrupts.
Signed-off-by: Tomoki Sekiyama
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Alex Shi
---
arch/x86/include/asm/hardirq.h |2 +-
a
Hi Jan,
On 2012/09/07 17:26, Jan Kiszka wrote:
> On 2012-09-06 13:27, Tomoki Sekiyama wrote:
>> This RFC patch series provides facility to dedicate CPUs to KVM guests
>> and enable the guests to handle interrupts from passed-through PCI devices
>> directly (without VM exit
Enable virtualization when slave CPUs are activated, and disable when
the CPUs are dying using slave CPU notifier call chain.
In x86, TSC kHz must also be initialized by tsc_khz_changed when the
new slave CPUs are activated.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc
the guest is resumed on an online CPU.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
---
arch/x86/include/asm/kvm_host.h | 15 +++
arch/x86/kvm/mmu.c | 13 +
arch/x
ion, kvm_arch_vcpu_put_migrate is used to avoid using IPI to
clear loaded vmcs from the old CPU. Instead, this immediately clears
vmcs.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
---
arch/x86/include/asm/kvm_
are called with CPU_SLAVE_UP when a slave CPU
becomes active. When the slave CPU is stopped, callbacks are called with
CPU_SLAVE_DYING on slave CPUs, and with CPU_SLAVE_DEAD on online CPUs.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc
vided to manage whether CPU is slave.
In addition, `cpu_online_or_slave_mask' is also provided for convenence of
APIC handling, etc.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
---
arch/x86/Kconfi
Split memory hotplug function from cpu_up() as cpu_memory_up(), which will
be used for assigning memory area to off-lined cpus at following patch
in this series.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter
-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
---
arch/x86/include/asm/kvm_host.h |5
arch/x86/kvm/mmu.c | 52 ---
arch/x86/kvm/mmu.h |4
s, if the guest issues EOI when there are no
in-service interrupts in the virtual APIC, physical EOI is issued.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
---
arch/x86/include/asm/kvm_host.h | 19
. Then, NMI handler will check the
requests and handles the requests.
This implementation has an issue in scalability, and is just for PoC.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
---
arch/x86/i
after every virtual IRQ is handled.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
---
arch/x86/kvm/vmx.c | 69 ++--
1 files changed, 67 insertions(+), 2
EXIT_REASON_PREEMPTION_TIMER,
which just goes back to VM execution soon.
These are currently intended only to be used with avoid entering the
guest on a slave CPU when vmx_prevent_run(vcpu, 1) is called.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H.
Initialize rcu related variables to avoid warnings about RCU usage while
slave CPUs is running specified functions. Also notify RCU subsystem before
the slave CPU is entered into idle state.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Avoid exiting from a guest on slave CPU even if HLT instruction is
executed. Since the slave CPU is dedicated to a vCPU, exit on HLT is
not required, and avoiding VM exit will improve the guest's performance.
This is a partial revert of
10166744b80a ("KVM: VMX: remove yield_on_hlt")
Cc:
upts to be routed either online CPUs or slave CPUs.
In this patch, if online CPUs are contained in specified affinity settings,
the affinity settings will be only applied to online CPUs. If every
specified CPU is slave, IRQ will be routed to slave CPUs.
Signed-off-by: Tomoki Sekiyama
Cc: Avi
slave CPUs.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
---
arch/x86/include/asm/kvm_host.h |1 +
arch/x86/kvm/lapic.c|5 +
arch/x86/kvm/vmx.c | 19 ++
guest must use the same vector as host.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
---
arch/x86/include/asm/apic.h |4 +++
arch/x86/include/asm/kvm_host.h |1 +
arch/x86/kernel/apic/apic.c
patch adds kvm_arch_vcpu_prevent_run(), which causes VM exit right
after VM enter. The NMI handler uses this to ensure the execution of the
guest is cancelled after NMI.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter
CPU with IRQ remapper of IOMMU.
This is intended to be used to routing interrupts directly to KVM guest
which is running on slave CPUs which do not cause VM EXIT by external
interrupts.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: &q
Add trace event "kvm_set_direct_interrupt" to trace enabling/disabling
direct interrupt delivery on slave CPUs. At the event, the guest rip and
whether the feature is enabled or not is logged.
Signed-off-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
If the slave CPU receives an interrupt in running a guest, current
implementation must once go back to onilne CPUs to handle the interupt.
This behavior will be replaced by later patch, which introduces direct
interrupt handling mechanism by the guest.
Signed-off-by: Tomoki Sekiyama
Cc: Avi
-by: Tomoki Sekiyama
Cc: Avi Kivity
Cc: Marcelo Tosatti
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
---
arch/x86/include/asm/kvm_host.h |2 +
arch/x86/kvm/vmx.c |7 +
arch/x86/kvm/x86.c | 58 ++
stem/cpu/cpu3/online
- Launch qemu-kvm with -no-kvm-pit option.
The offlined CPU is booted as a slave CPU and guest is runs on that CPU.
* To-do
- Enable slave CPUs to handle access fault
- Support AMD SVM
- Support non-Linux guests
---
Tomoki Sekiyama (21):
x86: request TLB flush
Commit-ID: 1d44b30f35a9873a65b320dd5300088fa995fd94
Gitweb: http://git.kernel.org/tip/1d44b30f35a9873a65b320dd5300088fa995fd94
Author: Tomoki Sekiyama
AuthorDate: Thu, 26 Jul 2012 19:47:32 +0900
Committer: Ingo Molnar
CommitDate: Thu, 26 Jul 2012 15:01:17 +0200
x86/ioapic: Fix NULL
__clear_irq_vector() can be reverted because
every vector_irq is already cleared in __fixup_irqs() on offlined CPUs.
Signed-off-by: Tomoki Sekiyama
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Suresh Siddha
Cc: Yinghai Lu
Cc: Alexander Gordeev
---
arch/x86/kernel/api
already cleared in __fixup_irqs() on offlined CPUs.
Signed-off-by: Tomoki Sekiyama
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Suresh Siddha
Cc: Yinghai Lu
Cc: Alexander Gordeev
---
arch/x86/kernel/apic/io_apic.c |4 ++--
arch/x86/kernel/irq.c |1 +
evert that too as part of this new proposed patch?
>
> thanks,
> suresh
OK, I will include a reverse patch of f6175f5bfb4c and resend the patch.
Thanks,
--
Tomoki Sekiyama
Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
--
To unsubscribe from this list: send
this bug by clearing vector_irq in __fixup_irqs() when
the cpu is offlined.
Signed-off-by: Tomoki Sekiyama
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Suresh Siddha
Cc: Yinghai Lu
Cc: Alexander Gordeev
---
arch/x86/kernel/irq.c |1 +
1 files changed, 1 inser
Hello Andrew,
Thank you for your comments.
Andrew Morton wrote:
> On Tue, 03 Apr 2007 19:46:04 +0900
> Tomoki Sekiyama <[EMAIL PROTECTED]> wrote:
>> If % of Dirty+Writeback > `dirty_writeback_start_ratio', generators of
>> dirty pages start writeback of dirty p
This patch adds a sysctl variable `vm.dirty_start_writeback_ratio' to
enable users to adjust the writeback starting level of the dirty pages.
Signed-off-by: Tomoki Sekiyama <[EMAIL PROTECTED]>
---
Documentation/filesystems/proc.txt | 11 +--
Documentation/sysctl/vm.txt
tors of dirty pages
are throttled as current Linux does, not to fill up memory with dirty
pages.
Thanks,
Signed-off-by: Tomoki Sekiyama <[EMAIL PROTECTED]>
---
include/linux/writeback.h |1
mm/page-writeback.c | 52 --
2 files change
_start_writeback_ratio,
dirty_start_writeback_ratio is just regarded as the same value as
dirty_ratio, and then the kernel behaves similarly as the current kernel.
Regards,
--
Tomoki Sekiyama
Hitachi, Ltd., Systems Development Laboratory
-
To unsubscribe from this list: send the line "unsubscr
uning with absolute values, I consider that we need to
modify handling of `dirty_background_ratio,' `dirty_ratio' and so on as
well as `dirty_start_writeback_ratio.' I think this should be done in
another patch if this feature is required.
Regards,
--
Tomoki Sekiyama
Hitachi, Ltd., Systems D
Hi,
Thanks for your comments.
I'm sorry for my late reply.
Bill Davidsen wrote:
> Andrew Morton wrote:
>>> On Wed, 14 Mar 2007 21:42:46 +0900 Tomoki Sekiyama
>>> <[EMAIL PROTECTED]> wrote:
>>>
>>> ...
>>>
>>>
>>> -So
t of balance_dirty_pages() loop if the disk doesn't have
remaining dirty pages, if Dirty+Writeback < vm.dirty_limit_ratio.
--
Tomoki Sekiyama
Hitachi, Ltd., Systems Development Laboratory
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body o
This patch adds sysctl variable vm.dirty_limit_ratio.
Signed-off-by: Tomoki Sekiyama <[EMAIL PROTECTED]>
Signed-off-by: Yuji Kakutani <[EMAIL PROTECTED]>
---
include/linux/sysctl.h|1 +
include/linux/writeback.h |1 +
kernel/sysctl.c | 11 +++
mm/page
decreased to
keep writeback independently among disks.
Signed-off-by: Tomoki Sekiyama <[EMAIL PROTECTED]>
Signed-off-by: Yuji Kakutani <[EMAIL PROTECTED]>
---
mm/page-writeback.c | 37 +
1 file changed, 29 insertions(+), 8 deletions(-)
Index: linux-2.
() is also changed to calculate the threshold from
the new limit provided by modified get_dirty_limits().
Signed-off-by: Tomoki Sekiyama <[EMAIL PROTECTED]>
Signed-off-by: Yuji Kakutani <[EMAIL PROTECTED]>
---
mm/page-writeback.c | 28
1 file changed, 16
rameter.
In the patchset, per-device-write-throttling is done by the behavior
of the write-requests queue described above.
When the queue of the disk becomes full while writeback of Dirty in
writeback_inodes(), heavy writes to the disk will be blocked.
In contrast, if it's so occasional
I think removing adjustable ratelimiting should be done in another patch...
Regards
--
Tomoki Sekiyama
Hitachi, Ltd., Systems Development Laboratory
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordom
t is 512KB. If you have several devices, it can
consume more than hundred MB memory.
I concerned about that, so I introduced dirty_limit_ratio to limit the
total amount of Dirty+Writeback pages.
Regards
--
Tomoki Sekiyama
Hitachi, Ltd., Systems Development Laboratory
-
To unsubscribe from this list:
decreased to
keep writeback independently among disks.
Signed-off-by: Tomoki Sekiyama <[EMAIL PROTECTED]>
Signed-off-by: Yuji Kakutani <[EMAIL PROTECTED]>
---
mm/page-writeback.c | 37 +
1 file changed, 29 insertions(+), 8 deletions(-)
Index: linux-2.
d-off-by: Tomoki Sekiyama <[EMAIL PROTECTED]>
Signed-off-by: Yuji Kakutani <[EMAIL PROTECTED]>
---
mm/page-writeback.c | 28
1 file changed, 16 insertions(+), 12 deletions(-)
Index: linux-2.6.20-mm2-bdp/mm
This patch adds sysctl variable vm.dirty_limit_ratio.
Signed-off-by: Tomoki Sekiyama <[EMAIL PROTECTED]>
Signed-off-by: Yuji Kakutani <[EMAIL PROTECTED]>
---
include/linux/sysctl.h|1 +
include/linux/writeback.h |1 +
kernel/sysctl.c | 11 +++
mm/page
irty pages.
3/3 - break out of balance_dirty_pages() loop if the disk doesn't have
remaining dirty pages, if Dirty+Writeback < vm.dirty_limit_ratio.
--
Tomoki Sekiyama
Linux Technology Center
Hitachi, Ltd., Systems Development Laboratory
E-mail: [EMAIL PROTECTED]
-
To uns
dd if=/dev/zero of=dummy bs=4096 count=1; done; sync
% cat /sys/block/sda/queue/nr_dirty
105
% for i in 1 2 3; do dd if=/dev/zero of=dummy bs=4096 count=1; done; sync
% cat /sys/block/sda/queue/nr_dirty
107
This patch fixes it.
Signed-off-by: Tomoki Sekiyama <[EMAIL PROTECTED]>
---
mm/trun
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