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 of a message to [EMAIL PROTECTED]
More majordomo info at http
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-writeback.c
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-2.6.21-rc3-mm2/mm
() 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 insertions(+), 12
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:
...
-Solution:
I consider that all of the dirty pages for the disk have been written
back and that the disk
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 Development Laboratory
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL
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 pages by themselves. At that time
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 unsubscribe from this list: send the line unsubscribe
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-writeback.c
-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/page-writeback.c
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-2.6.20-mm2-bdp/mm
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: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More
--
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 majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
.
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 that the queue doesn't become full,
writes will not be blocked.
Regards
--
Tomoki Sekiyama
Hitachi, Ltd., Systems Development
as the current kernel.
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 majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ
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 changed, 42 insertions(+), 11 deletions(-)
Index: linux-2.6.21
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|3
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 double-counted in irq_call_count, so it must
/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 to slave
-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include/asm/kvm_host.h |2 +
arch/x86/kvm/vmx.c
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
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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo
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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti
.
This 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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa
, and
guest must use the same vector as host.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86
on slave CPUs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include/asm/kvm_host.h |1
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 tomoki.sekiyama
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:
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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo
for 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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa
after every virtual IRQ is handled.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/kvm/vmx.c
. 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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t
this, 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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi
-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include/asm/kvm_host.h |5
arch/x86/kvm/mmu.c
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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc
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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo
, 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 tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc
for the guest is resumed on an online CPU.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include
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 tomoki.sekiyama...@hitachi.com
Cc: Avi
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 and relay by the host
TLB shootdowns entry in /proc/interrupts to count TLB
shootdowns separately from the other function call interrupts.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
Cc: Alex Shi
separately from the other function call interrupts.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
Cc: Alex Shi alex@intel.com
---
arch/x86/include/asm/hardirq.h |2
will include a reverse patch of f6175f5bfb4c and resend the patch.
Thanks,
--
Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord
in __fixup_irqs() on offlined CPUs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
Cc: Suresh Siddha suresh.b.sid...@intel.com
Cc: Yinghai Lu ying...@kernel.org
Cc: Alexander Gordeev agord
be reverted because
every vector_irq is already cleared in __fixup_irqs() on offlined CPUs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
Cc: Suresh Siddha suresh.b.sid
; do 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/truncate.c
by clearing vector_irq in __fixup_irqs() when
the cpu is offlined.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
Cc: Suresh Siddha suresh.b.sid...@intel.com
Cc: Yinghai Lu ying
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 running specified functions
On 8/1/13 17:04 , Jens Axboe ax...@kernel.dk 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 application launches several hundreds of processes that
issue
only a few
the
other path, as it is exposed function (and queue_attr_store will uses
__elevator_change() now, the non-locking version of elevator_change()).
Signed-off-by: Tomoki Sekiyama tomoki.sekiy...@hds.com
---
block/blk-core.c |6 +-
block/elevator.c | 16 ++--
2 files changed
, 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 tomoki.sekiy...@hds.com
---
block/cfq-iosched.c | 36 +++-
1 file changed, 31 insertions(+), 5 deletions
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
(10+ seconds at the worst case), although
Hi all,
Is this patchset going to be merged into 3.12?
Thanks,
--
Tomoki
On 9/23/13 16:14 , Tejun Heo t...@kernel.org wrote:
Hello,
On Mon, Sep 23, 2013 at 08:11:55PM +, Tomoki Sekiyama wrote:
Hmm... why aren't we just changing elevator_init() to grab sysfs_lock
where necessary
Ping: any comments for this series?
On 8/30/13 18:47 , Tomoki Sekiyama tomoki.sekiy...@hds.com 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
Hi vivek,
Thanks for your comments.
On 8/29/13 14:33 , Vivek Goyal vgo...@redhat.com 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
On 8/29/13 14:43 , Vivek Goyal vgo...@redhat.com 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 and automated elevator switching
On 8/29/13 16:29 , Vivek Goyal vgo...@redhat.com 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] BUG: soft lockup - CPU#3 stuck
-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 tomoki.sekiy...@hds.com
---
block/blk-core.c | 10 +-
block/elevator.c |6 ++
2 files changed, 15 insertions(+), 1 deletion(-)
diff
taken by elv_iosched_store().
Signed-off-by: Tomoki Sekiyama tomoki.sekiy...@hds.com
---
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
Hi Tejun,
Thank you for the review.
On 9/22/13 13:04 , Tejun Heo t...@kernel.org 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,
q-sg_reserved_size = INT_MAX
'__init' to boot the guest successfully with 'console=hvc0'.
Signed-off-by: Tomoki Sekiyama tomoki.sekiy...@hds.com
---
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_console.c
index 94f9e3a
'__init' to boot the guest successfully with 'console=hvc0'.
Signed-off-by: Tomoki Sekiyama tomoki.sekiy...@hds.com
---
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_console.c
index 94f9e3a
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
+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 <tomoki.sekiyama...@hitachi.com>
Cc: Jiri Olsa <jo...@kerne
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 <tomoki.sekiyama...@hitachi.com>
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 <tomoki.sekiyama...@hitachi.com>
Fixes: cdce9d738b91e ("perf sched: Add sched latency profiling")
Cc: Jiri Olsa &
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.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama...@hitachi.com>
Cc: Jiri Olsa <jo...@kernel.org>
Cc: David
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 <tomoki.sekiyama...@hitachi.com>
Cc: Jiri Olsa <jo...@kernel.org>
Cc: David
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 <tomoki.sekiyama...@hitachi.com>
uce 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 <tomoki.sekiyama...@hitachi.com>
Cc: Jiri Olsa <jo...@kernel.org>
Cc: David Ahern &
for DMA
memory allocation for USB devices in such architectures.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiy...@gmail.com>
---
drivers/media/common/siano/smscoreapi.c | 34 +++--
drivers/media/common/siano/smscoreapi.h | 2 ++
drivers/media/usb/siano/smsusb.c
From: Tomoki Sekiyama <tomoki.sekiy...@gmail.com>
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
From: Tomoki Sekiyama <tomoki.sekiy...@gmail.com>
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
sk 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 of a message to [EMAIL PROTECTED]
More
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 inser
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 unsubscribe from this list:
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
-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/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.
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: sen
g 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 majordomo info at http
er.
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 that the
rty_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 "unsubscribe linux-kernel" in
the body of a
s 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 changed, 42 insertions(+), 11 deletions(-
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
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
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:
>>>
>>> ...
>>>
>>>
>>> -Solutio
der 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 Development Laboratory
-
To unsubscribe from t
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 pages
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
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
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
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
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
tion 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
---
bloc
1 - 100 of 156 matches
Mail list logo
