From: Namjae Jeon
This patch-set eliminates the client side ESTALE errors when a FAT partition
exported over NFS has its dentries evicted from the cache.
One of the reasons for this error is lack of permanent inode numbers on FAT
which makes it difficult to construct persistent file handles.
We have no way of validating what all of the Asus WMI methods do on a
given machine, and there's a risk that some will allow hardware state to
be manipulated in such a way that arbitrary code can be executed in the
kernel. Add a capability check to prevent that.
Signed-off-by: Matthew Garrett
Secure boot adds certain policy requirements, including that root must not
be able to do anything that could cause the kernel to execute arbitrary code.
The simplest way to handle this would seem to be to add a new capability
and gate various functionality on that. We'll then strip it from the
Allowing users to write to address space makes it possible for the kernel
to be subverted. Restrict this when we need to protect the kernel.
Signed-off-by: Matthew Garrett
---
drivers/char/mem.c | 6 ++
1 file changed, 6 insertions(+)
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
kexec could be used as a vector for a malicious user to use a signed kernel
to circumvent the secure boot trust model. In the long run we'll want to
support signed kexec payloads, but for the moment we should just disable
loading entirely in that situation.
Signed-off-by: Matthew Garrett
---
The firmware has a set of flags that indicate whether secure boot is enabled
and enforcing. Use them to indicate whether the kernel should lock itself
down.
Signed-off-by: Matthew Garrett
---
Documentation/x86/zero-page.txt | 2 ++
arch/x86/boot/compressed/eboot.c | 32
The UEFI Secure Boot trust model is based on it not being possible for a
user to cause a signed OS to boot an unsigned OS, even if that user has
administrative privileges. This is an initial attempt at a set of patches
to reduce root's ability to modify the kernel. We've done this with an
From: Josh Boyer
This forcibly drops CAP_SECURE_FIRMWARE from both cap_permitted and cap_bset
in the init_cred struct, which everything else inherits from. This works on
any machine and can be used to develop even if the box doesn't have UEFI.
Signed-off-by: Josh Boyer
---
kernel/cred.c | 17
IO port access would permit users to gain access to PCI configuration
registers, which in turn (on a lot of hardware) give access to MMIO register
space. This would potentially permit root to trigger arbitrary DMA, so lock
it down by default.
Signed-off-by: Matthew Garrett
---
On Tue, Sep 4, 2012 at 9:06 PM, Takashi Iwai wrote:
> Hi,
>
> as I've got recently a few bug reports regarding the stuck with
> request_firmware() in module_init of some sound drivers, I started
> looking at the issue. Strangely, the problem doesn't happen on
> openSUSE 12.2 although it has the
On Tue, Sep 04, 2012 at 07:46:02PM +0800, Dong Aisheng wrote:
> On Tue, Sep 04, 2012 at 07:35:45PM +0800, Andi Shyti wrote:
> > Hi Dong,
> >
> > On Tue, Sep 04, 2012 at 11:20:08AM +0800, Dong Aisheng wrote:
> > > +static int __devinit syscon_probe(struct platform_device *pdev)
> > > +{
> > > +
On Wed, 2012-08-29 at 09:28 +0800, Cong Wang wrote:
> On Tue, Aug 28, 2012 at 2:22 AM, Steven Rostedt wrote:
> > The file feature-removal-schedule.txt is ignored by most people except
> > for people that add to it. It's more of a global TODO list for
> > developers than being anything useful by
On 09/03, Al Viro wrote:
>
> On Mon, Sep 03, 2012 at 06:05:38PM +0200, Oleg Nesterov wrote:
>
> > This is not easy to fix. ptrace_disable() and user_disable_single_step()
> > is arch dependant, but at least on x86 it assumes that the tracee is not
> > running, so exit_ptrace() can't do this.
>
>
On Tue, 2012-08-28 at 19:00 -0400, Mathieu Desnoyers wrote:
> Looking again at:
>
> +#define hash_for_each_size(name, bits, bkt, node, obj, member)
> \
> + for (bkt = 0; bkt < HASH_SIZE(bits); bkt++)
> \
> +
On 04.09.12 11:16:16, Steven Rostedt wrote:
> On Tue, 2012-08-28 at 10:12 +0200, Robert Richter wrote:
> > BUG: unable to handle kernel NULL pointer dereference at 0040
> > IP: [] print_context_stack+0x6e/0x8d
> > *pde =
> > Oops: [#1] SMP
> > Modules linked in:
> >
> > Pid:
On Tue, 2012-08-21 at 17:48 -0700, Tim Chen wrote:
>
> Thanks to Matthew's suggestions on improving the patch. Here's the
> updated version. It seems to be sane when I booted my machine up. I
> will put it through more testing when I get a chance.
>
> Tim
>
Matthew,
The new patch seems to
On Tue, Sep 4, 2012 at 4:16 PM, Iulius Curt wrote:
> synchronize_net is called every time we close a PF_PACKET socket which is
> causing performance loss when doing this on many sockets.
Do you have any particular use case in mind? I can imagine if you are
closing a PF_PACKET socket in a network
On Tue, 2012-08-28 at 10:12 +0200, Robert Richter wrote:
> On 27.08.12 17:14:27, Robert Richter wrote:
> > Steven and Ingo,
> >
> > while running profiling tests on 32 bit I got a
> >
> > Kernel panic - not syncing: Fatal exception in interrupt
Sorry for the late response, was too busy
From: Jens Taprogge
During initialization we configure the TPCI200 so it does not swap data
lanes on IndustryPack module access. The read and write functions are
changed accordingly.
We are taking this approach in the hope that all IP Carriers are able to
present the Module memory layout
From: Jens Taprogge
Define memory address space, fix sparse warnings and mark the structs
reflecting hardware memory layout "packed" to be on the safe side.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/devices/ipoctal.c | 14 ++---
synchronize_net is called every time we close a PF_PACKET socket which is
causing performance loss when doing this on many sockets.
Signed-off-by: Sorin Dumitru
Signed-off-by: Iulius Curt
---
Statistics using test program [1]
Sockets count | Not patched | Patched
From: Jens Taprogge
They are not used any longer.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/bridges/tpci200.c | 218 ---
1 file changed, 218 deletions(-)
diff --git a/drivers/staging/ipack/bridges/tpci200.c
From: Jens Taprogge
The modaliases look like ipack:fXvNdM, where X is the format version (8
bit) and N and M are the vendor and device ID represented as 32 bit
hexadecimal numbers each. Using 32 bits allows us to define IPACK_ANY_ID
as (~0) without interfering with the valid ids.
The resulting
From: Jens Taprogge
We keep a copy of the ID space for later use.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/ipack.c | 80 +
drivers/staging/ipack/ipack.h |5 +++
2 files changed, 85
On 09/04/2012 03:55 PM, David Vrabel wrote:
On 04/09/12 15:37, Konrad Rzeszutek Wilk wrote:
On Tue, Sep 04, 2012 at 03:07:42PM +0100, Stefano Panella wrote:
So if hwdev->coherent_dma_mask is set to 0x our dma_mask will
be u64 set to 0x even if we set it to
From: Jens Taprogge
Devices are match based upon their vendor and device ids. Since
the individual drivers provide a list of supported ids they do not
need to implement the matching themselves.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
From: Jens Taprogge
The modalias entries for the module are now created.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/devices/ipoctal.c | 13 +
1 file changed, 13 insertions(+)
diff --git
From: Jens Taprogge
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/devices/ipoctal.c |8 +---
drivers/staging/ipack/ipack.h |2 +-
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git
On 2012-09-04 15:39, Jan Kara wrote:
Hello,
first, you have my address wrong (you had suze instead of suse) which is
why I wasn't getting your email and not replying (missed the patch in LKML
traffic). Second, it's good to CC also linux-fsdevel for UDF related
matters (I tend to use that
From: Jens Taprogge
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/ipack.c | 31 +++
1 file changed, 31 insertions(+)
diff --git a/drivers/staging/ipack/ipack.c b/drivers/staging/ipack/ipack.c
index
From: Jens Taprogge
Also include it in the hotplug event so that udev can
provide the respective driver.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/ipack.c | 36
1 file changed, 36 insertions(+)
diff
From: Jens Taprogge
Also expose the values through sysfs.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/ipack.c | 81 +++--
drivers/staging/ipack/ipack.h |4 +-
2 files changed, 80 insertions(+), 5
From: Jens Taprogge
No need to have a struct when it has only one field.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/devices/ipoctal.c | 82 +++---
drivers/staging/ipack/devices/scc2698.h | 116
From: Jens Taprogge
Rename them in the process.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/devices/ipoctal.c | 26 +++---
drivers/staging/ipack/ipack_ids.h |5 +
2 files changed, 16 insertions(+), 15
They are not used any longer.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/ipack.h | 12
1 file changed, 12 deletions(-)
diff --git a/drivers/staging/ipack/ipack.h b/drivers/staging/ipack/ipack.h
index 8bc001e..e3609b1 100644
From: Jens Taprogge
These changes make it easier to add more initialization steps later on.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/bridges/tpci200.c | 25 +++--
1 file changed, 15 insertions(+), 10 deletions(-)
From: Jens Taprogge
Before it was using the functions in ipack_bus_ops.
Signed-off-by: Jens Taprogge
Signed-off-by: Samuel Iglesias Gonsálvez
---
drivers/staging/ipack/devices/ipoctal.c | 29 -
1 file changed, 8 insertions(+), 21 deletions(-)
diff --git
Hello,
This bunch of patches adds support to autoload IP module drivers when they are
detected by the ipack bus driver.
Also, it changes the endianness of the carrier device to Big Endian as it is
defined in the Industry Pack standard. Due to that, the source code is
simplified too.
There are
On Sat, 1 Sep 2012, Liu, Chuansheng wrote:
> From: liu chuansheng
> Subject: [PATCH] USB/host: Cleanup unneccessary irq disable code
>
> Because the IRQF_DISABLED as the flag is now a NOOP and has been
> deprecated and in hardirq context the interrupt is disabled.
>
> so in usb/host code:
>
Hello Jiří,
On Tue, 4 Sep 2012, Jiri Kosina wrote:
> Paul Walmsley has implemented dynamic quirk handling back in 2007 through
> commits:
>
> 2eb5dc30eb ("USB HID: encapsulate quirk handling into hid-quirks.c")
> 8222fbe67c ("USB HID: clarify static quirk handling as squirks")
> 8cef908235
>From 728a17e2de591b557c3c8ba31076b4bf2ca5ab42 Mon Sep 17 00:00:00 2001
From: Liu, Jinsong
Date: Wed, 5 Sep 2012 03:18:15 +0800
Subject: [PATCH] KVM: tsc deadline timer works only when hrtimer high
resolution configured
This is for 2 reasons:
1. it's pointless to enable tsc deadline timer to
On Sun, 2012-09-02 at 14:34 -0700, Anton Vorontsov wrote:
> On Sun, Sep 02, 2012 at 09:44:04PM +0530, Sannu K wrote: [...]
> > Just Curious what is the use of this module? Is there any user space
> > program uses this? When ACPI drivers for battery is available how
> > useful will this be?
>
>
On Tue, Sep 4, 2012 at 5:25 PM, Lucas De Marchi
wrote:
> Hi Rusty,
>
> On Tue, Sep 4, 2012 at 2:55 AM, Rusty Russell wrote:
>> OK, I took a look at the module.c parts of David and Dmitry's patchsets,
>> and didn't really like either, but I stole parts of David's to make
>> this.
>>
>> So, here's
On Sun, 2012-09-02 at 07:51 -0700, Guenter Roeck wrote:
> On Sat, Sep 01, 2012 at 11:31:11AM +0200, Lars-Peter Clausen wrote:
> > On 08/31/2012 06:04 PM, Guenter Roeck wrote:
> > > On Thu, Aug 30, 2012 at 09:42:57PM -0400, Vivien Didelot wrote:
> > >> The MAX197 is an A/D converter, made by Maxim.
On Tue, Sep 04, 2012 at 04:55:56PM +0200, Paolo Bonzini wrote:
> Il 04/09/2012 16:47, Michael S. Tsirkin ha scritto:
> >> > static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq,
> >> > - struct virtqueue *vq)
> >> > + struct
On Fri, Aug 31, 2012 at 07:13:48PM -0700, Tejun Heo wrote:
> Hello, Vivek.
>
> On Thu, Aug 30, 2012 at 06:07:45PM -0400, Vivek Goyal wrote:
> > Here is one quick and dirty proof of concept patch. It checks for stack
> > depth and if remaining space is less than 20% of stack size, then it
> >
>> I believe it would be really great to have a way to turn the default
>> to 1 - and stop the shouting.
>
> We already can. You can use /etc/cgconfig (if you are using libcgroup)
> or do it manually.
>
>> Even if you are doing it in OpenSUSE as a patch, an upstream patch means
>> at least that
On Tue, Sep 04, 2012 at 10:46:36AM +0300, Artem Bityutskiy wrote:
> Let's CC LKML and Paul.
>
>
> On Sat, 2012-09-01 at 22:19 -0700, Subodh Nijsure wrote:
> > Hello,
> >
> > I am running 3.6-rc4 kernel on my MX28 based board and every time I
> > mount UBI file system I see following warning.
Il 04/09/2012 16:47, Michael S. Tsirkin ha scritto:
>> > static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq,
>> > - struct virtqueue *vq)
>> > + struct virtqueue *vq, bool affinity)
>> > {
>> >spin_lock_init(_vq->vq_lock);
>> >
On 04/09/12 15:37, Konrad Rzeszutek Wilk wrote:
> On Tue, Sep 04, 2012 at 03:07:42PM +0100, Stefano Panella wrote:
>>
>> So if hwdev->coherent_dma_mask is set to 0x our dma_mask will
>> be u64 set to 0x even if we set it to DMA_BIT_MASK(32)
>> previously.
>
>
> + /* Read command completed register */
> + done_mask = ioread32(hcr_base + CC);
> +
> + if (host_priv->quirks & SATA_FSL_QUIRK_V2_ERRATA) {
> + if (unlikely(hstatus & INT_ON_DATA_LENGTH_MISMATCH)) {
> + for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
> +
On Tue 04-09-12 18:37:53, Glauber Costa wrote:
> On 09/04/2012 06:35 PM, Michal Hocko wrote:
> > On Tue 04-09-12 17:27:20, Glauber Costa wrote:
> >> On 09/04/2012 05:09 PM, Michal Hocko wrote:
> >>> Not really. Do it slowly means that somebody actually _notices_ that
> >>> something is about to
The util-linux release v2.22 is available at
ftp://ftp.kernel.org/pub/linux/utils/util-linux/v2.22
Feedback and bug reports, as always, are welcomed.
Karel
Util-linux 2.22 Release Notes
=
The cryptoloop support in the commands mount(8) and losetup(8) is
On Tue, Sep 04, 2012 at 03:07:42PM +0100, Stefano Panella wrote:
> On 08/31/2012 05:40 PM, Konrad Rzeszutek Wilk wrote:
> >On Fri, Aug 31, 2012 at 01:47:05PM +0100, David Vrabel wrote:
> >>On 31/08/12 10:57, Stefano Panella wrote:
> >>>When running 32-bit pvops-dom0 and a driver tries to allocate
On Tue, Aug 28, 2012 at 01:54:17PM +0200, Paolo Bonzini wrote:
> @@ -575,15 +630,19 @@ static struct scsi_host_template virtscsi_host_template
> = {
> &__val, sizeof(__val)); \
> })
>
> +
Pls don't add empty lines.
> static void virtscsi_init_vq(struct
On Tue, Sep 04, 2012 at 10:12:49PM +0800, Tao Ma wrote:
> On 09/04/2012 09:35 PM, Vivek Goyal wrote:
> > On Fri, Aug 31, 2012 at 01:15:09PM +0800, Tao Ma wrote:
> >
> > [..]
> >> diff --git a/block/blk-throttle.c b/block/blk-throttle.c
> >> index 1588c2d..9317d71 100644
> >> ---
Convert omap_wdt to new watchdog core. On OMAP boards, there are usually
multiple watchdogs. Since the new watchdog core supports multiple
watchdogs, all watchdog drivers used on OMAP should be converted.
The legacy watchdog device node is still created, so this should not
break existing users.
On 09/04/2012 06:35 PM, Michal Hocko wrote:
> On Tue 04-09-12 17:27:20, Glauber Costa wrote:
>> On 09/04/2012 05:09 PM, Michal Hocko wrote:
>>> Not really. Do it slowly means that somebody actually _notices_ that
>>> something is about to change and they have a lot of time for that. This
>>> will
Linus,
The following changes since commit 53e1719f3da0f095b8db1461bd12dd79f3246b84:
ALSA: snd-als100: fix suspend/resume (2012-08-21 07:29:40 +0200)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git tags/sound-3.6
for you to fetch
On Tue, Sep 04, 2012 at 04:30:35PM +0200, Paolo Bonzini wrote:
> Il 04/09/2012 16:21, Michael S. Tsirkin ha scritto:
> > > One reason is that, even though in practice I expect roughly the same
> > > number of targets and VCPUs, hotplug means the number of targets is
> > > difficult to predict and
hem
> a bit neater.
>
> Signed-off-by: Ian Abbott
> ---
> v2: Rework error handling in udf_direct_IO to avoid calling deprecated
> vmtruncate().
> v3: Rebased to next-20120904.
> ---
> fs/udf/file.c | 29 +
> fs/udf/inode.c | 52 +++
The original model of device_cgroup is having a whitelist where all the
allowed devices are listed. The problem with this approach is that is
impossible to have the case of allowing everything but few devices.
The reason for that lies in the way the whitelist is handled internally:
since there's
This patch replaces the "whitelist" usage in the code and comments and replace
them by exception list related information.
v2:
- fix checkpatch warnings
Cc: Tejun Heo
Cc: Li Zefan
Cc: James Morris
Cc: Pavel Emelyanov
Cc: Serge Hallyn
Signed-off-by: Aristeu Rozanski
---
On Tue 04-09-12 17:27:20, Glauber Costa wrote:
> On 09/04/2012 05:09 PM, Michal Hocko wrote:
> > Not really. Do it slowly means that somebody actually _notices_ that
> > something is about to change and they have a lot of time for that. This
> > will be really hard with the config option saying N
The original model of device_cgroup is having a whitelist where all the
allowed devices are listed. The problem with this approach is that is
impossible to have the case of allowing everything but few devices.
The reason for that lies in the way the whitelist is handled internally:
since there's
This function cleans all the items in a whitelist and will be used by the next
patches.
v2:
- no changes
Cc: Tejun Heo
Cc: Li Zefan
Cc: James Morris
Cc: Pavel Emelyanov
Cc: Serge Hallyn
Signed-off-by: Aristeu Rozanski
---
security/device_cgroup.c | 22 +-
1 file
On Tue, 4 Sep 2012, Nicolas Ferre wrote:
> On 08/29/2012 11:49 AM, Nicolas Ferre :
> > If the number of ports present on the SoC/board is not the maximum
> > and that the platform data is not filled with all data, there is
> > an easy way to mess the PIO setup for this interface.
> > This quick
Internally device_cgroup now uses a default rule (behavior) and an exception
list and this interface reflects it.
The new files, devices.behavior ('allow' or 'deny') and devices.exceptions map
directly to the internal state.
Also, update documentation about the new interface.
Cc: Tejun Heo
Cc:
behavior will determine if the default policy is to deny all device access
unless for the ones in the exception list.
This variable will be used in the next patches to convert device_cgroup
internally into a default policy + rules.
v2:
- renamed deny_all to behavior
Cc: Tejun Heo
Cc: Li Zefan
This patch converts the code to use kstrtou32() instead of simple_strtoul()
which is deprecated. The real size of the variables are u32, so use kstrtou32
instead of kstrtoul
Signed-off-by: Aristeu Rozanski
---
security/device_cgroup.c | 28 ++--
1 file changed, 22
Il 04/09/2012 16:21, Michael S. Tsirkin ha scritto:
> > One reason is that, even though in practice I expect roughly the same
> > number of targets and VCPUs, hotplug means the number of targets is
> > difficult to predict and is usually fixed to 256.
> >
> > The other reason is that per-target
On Monday 03 September 2012, Lee Jones wrote:
> > But if you are handling both, then I agree that platform_data should
> > override DT.
>
> I do agree with this, but I haven't stumbled over such a use-case yet.
> I have only provided; clock names, DMA settings and call-back information
> via
Hi Michel,
On Tue, Sep 04, 2012 at 02:20:52AM -0700, Michel Lespinasse wrote:
> This change fixes an anon_vma locking issue in the following situation:
> - vma has no anon_vma
> - next has an anon_vma
> - vma is being shrunk / next is being expanded, due to an mprotect call
>
> We need to take
On Thu, 2012-08-30 at 14:28 -0700, Josh Triplett wrote:
> The ACPI BGRT lets the OS access the BIOS logo image and its position on the
> screen at boot time, allowing it to maintain that image on the screen until
> ready to display something else, making boot more seamless. This series fixes
>
Hi Rusty,
On Tue, Sep 4, 2012 at 2:55 AM, Rusty Russell wrote:
> OK, I took a look at the module.c parts of David and Dmitry's patchsets,
> and didn't really like either, but I stole parts of David's to make
> this.
>
> So, here's the module.c part of module signing. I hope you two got time
>
Il 04/09/2012 16:19, Michael S. Tsirkin ha scritto:
> > > Also - some kind of comment explaining why a similar race can not happen
> > > with this lock in place would be nice: I see why this specific race can
> > > not trigger but since lock is dropped later before you submit command, I
> > > have
On Wed, Aug 15, 2012 at 04:43:31PM -0700, Mike Turquette wrote:
> +void __clk_unprepare(struct clk *clk, struct clk *top)
> +{
> if (clk->ops->unprepare)
> clk->ops->unprepare(clk->hw);
>
> - __clk_unprepare(clk->parent);
> + if (clk != top)
> +
On Tue, Sep 04, 2012 at 10:12:49PM +0800, Tao Ma wrote:
> On 09/04/2012 09:35 PM, Vivek Goyal wrote:
> > On Fri, Aug 31, 2012 at 01:15:09PM +0800, Tao Ma wrote:
> >
> > [..]
> >> diff --git a/block/blk-throttle.c b/block/blk-throttle.c
> >> index 1588c2d..9317d71 100644
> >> ---
One of the pain points we have today with cgroups, is the excessive
flexibility coming from the fact that controllers can be mounted at
will, without any relationship with each other.
Although this is nice in principle, this comes with a cost that is not
always welcome in practice. The very fact
Currently, the only test that prevents us from running the expensive
cpuacct_charge() is cpuacct_subsys.active == true. This will hold at all
times after the subsystem is activated, even if it is not mounted.
IOW, use it or not, you pay it. By hooking with the bind() callback, we
can detect when
cpuacct_charge() incurs in some quite expensive operations to achieve
its measurement goal. To make matters worse, this cost is not constant,
but grows with the depth of the cgroup hierarchy tree. Also, all this
data is already available anyway in the scheduler core.
The fact that the cpuacct
exec_clock already provides per-group cpu usage metrics, and can be
reused by cpuacct in case cpu and cpuacct are comounted.
However, it is only provided by tasks in fair class. Doing the same for
rt is easy, and can be done in an already existing hierarchy loop. This
is an improvement over the
Although we have not yet identified any place where cpusets could be
improved performance-wise by guaranteeing comounts with the other two
cpu cgroups, it is a sane choice to mount them together.
We can preemptively benefit from it and avoid a growing mess, by
guaranteeing that subsystems that
Hi,
As we have been extensively discussing, the cost and pain points for cgroups
come from many places. But at least one of those is the arbitrary nature of
hierarchies. Many people, including at least Tejun and me would like this to go
away altogether. Problem so far, is breaking compatiblity
On Tue, Sep 04, 2012 at 03:49:42PM +0200, Paolo Bonzini wrote:
> Il 04/09/2012 14:48, Michael S. Tsirkin ha scritto:
> >> > This patch adds queue steering to virtio-scsi. When a target is sent
> >> > multiple requests, we always drive them to the same queue so that FIFO
> >> > processing order is
On Tue, Sep 04, 2012 at 03:45:57PM +0200, Paolo Bonzini wrote:
> > Also - some kind of comment explaining why a similar race can not happen
> > with this lock in place would be nice: I see why this specific race can
> > not trigger but since lock is dropped later before you submit command, I
> >
On Tue, Sep 04, 2012 at 06:57:14AM -0400, Christoph Hellwig wrote:
> On Tue, Sep 04, 2012 at 06:17:47PM +0800, Li Wang wrote:
> > For file system created on file-backed loop device, there will be
> > two-levels of
> > page cache present, which typically doubles the memory consumption.
>
> And
On 09/04/2012 09:35 PM, Vivek Goyal wrote:
> On Fri, Aug 31, 2012 at 01:15:09PM +0800, Tao Ma wrote:
>
> [..]
>> diff --git a/block/blk-throttle.c b/block/blk-throttle.c
>> index 1588c2d..9317d71 100644
>> --- a/block/blk-throttle.c
>> +++ b/block/blk-throttle.c
>> @@ -46,6 +46,8 @@ struct
On Tue, Sep 04, 2012 at 02:12:33PM +0200, Sjur Brændeland wrote:
> Hi Michael,
>
> >> >> Fix panic in virtio.c when CONFIG_DEBUG_SLAB is set.
> >> >
> >> > What's the root cause of the panic?
> >>
> >> I believe the cause of the panic is calling
> >> ida_simple_remove(_index_ida, dev->index);
>
On 08/31/2012 05:40 PM, Konrad Rzeszutek Wilk wrote:
On Fri, Aug 31, 2012 at 01:47:05PM +0100, David Vrabel wrote:
On 31/08/12 10:57, Stefano Panella wrote:
When running 32-bit pvops-dom0 and a driver tries to allocate a coherent
DMA-memory the xen swiotlb-implementation returned memory beyond
Signed-off-by: Axel Lin
---
drivers/gpio/gpio-sx150x.c | 24 ++--
1 file changed, 6 insertions(+), 18 deletions(-)
diff --git a/drivers/gpio/gpio-sx150x.c b/drivers/gpio/gpio-sx150x.c
index a4f7353..eb3e215 100644
--- a/drivers/gpio/gpio-sx150x.c
+++
From: Alan Cox
As noted by David Binderman
Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=46581
Signed-off-by: Alan Cox
---
drivers/staging/rts_pstor/rtsx_scsi.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/rts_pstor/rtsx_scsi.c
Then we can remove irq_to_priv() function.
Signed-off-by: Axel Lin
---
drivers/gpio/gpio-em.c | 12 +++-
1 file changed, 3 insertions(+), 9 deletions(-)
diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c
index ec48ed5..efb4c2d 100644
--- a/drivers/gpio/gpio-em.c
+++
On Mon, Sep 03, 2012 at 10:49:27AM +1000, Dave Chinner wrote:
> On Thu, Aug 30, 2012 at 06:07:45PM -0400, Vivek Goyal wrote:
> > On Wed, Aug 29, 2012 at 10:13:45AM -0700, Kent Overstreet wrote:
> >
> > [..]
> > > > Performance aside, punting submission to per device worker in case of
> > > >
Adapt clocks to the new i.mx clock framework and fix the following warning:
[ cut here ]
WARNING: at drivers/clk/clk.c:511 __clk_enable+0x9c/0xac()
Modules linked in:
Backtrace:
[<800124c8>] (dump_backtrace+0x0/0x10c) from [<804172dc>] (dump_stack+0x18/0x1c)
r7:0009
In current driver, everytime we need to access the rng clock
,ie to enable or disable it, a call to clk_get is done.
This is not correct and the preferred way is to provide a rng data structure
that could be used for accessing rng resources.
Acked-by: Sascha Hauer
Signed-off-by: Fabio Estevam
Il 04/09/2012 14:48, Michael S. Tsirkin ha scritto:
>> > This patch adds queue steering to virtio-scsi. When a target is sent
>> > multiple requests, we always drive them to the same queue so that FIFO
>> > processing order is kept. However, if a target was idle, we can choose
>> > a queue
On Tue, Sep 04, 2012 at 01:28:36PM +0200, Sjur Brændeland wrote:
> Hi Michael,
>
> >> If an architecture do not support DMA you will get
> >> a link error: "unknown symbol" for dma_alloc_coherent.
> >
> > Yes, it even seems intentional.
> > But I have a question: can the device work without DMA?
Il 04/09/2012 15:35, Michael S. Tsirkin ha scritto:
> I see. I guess you can rewrite this as:
> atomic_inc
> if (atomic_read() == 1)
> which is a bit cheaper, and make the fact
> that you do not need increment and return to be atomic,
> explicit.
It seems more complicated to me for hardly any
On Thu, Aug 23, 2012 at 05:44:22PM -0600, Bjorn Helgaas wrote:
> On Thu, Aug 23, 2012 at 10:36 AM, Matthew Garrett wrote:
> > EFI provides support for providing PCI ROMs via means other than the ROM
> > BAR. This support vanishes after we've exited boot services, so add support
> > for stashing
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