On Fri, 7 Sep 2018, Jiri Kosina wrote:
> On Fri, 7 Sep 2018, Thomas Gleixner wrote:
>
> > > + * The read-modify-write of the MSR doesn't need any race protection
> > > here,
> > > + * as we're running in atomic context.
> > > + */
> > > +static void enable_stibp(void *info)
> > > +{
> > > + u64
idma64_chan_irq() is invoked in hardirq handle function, it is unnecessary
to call spin_lock_irqsave.
Signed-off-by: Zhaoxiong Yuan
---
drivers/dma/idma64.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c
index 1fbf9cb..5b9c156
On Fri, 7 Sep 2018, Andy Lutomirski wrote:
> On Fri, Sep 7, 2018 at 5:04 PM, Linus Torvalds
> wrote:
> > Virtual mapping tricks may be cool, but in the end, not having to use
> > them is better still, I think.
> >
>
> If (and this is a *big* if) all the percpu data is within 2GB of the
> entry te
On Fri, 7 Sep 2018, Linus Torvalds wrote:
> On Fri, Sep 7, 2018 at 12:54 PM Thomas Gleixner wrote:
> >
> > > - We execute from an extra page and read from another extra page
> > > during the syscall. (The latter is because we need to use a relative
> > > addressing mode to find sp1 -- it's the s
On 8 September 2018 2:40:21 AM IST, Greg Kroah-Hartman
wrote:
>This is the start of the stable review cycle for the 3.18.122 release.
>There are 29 patches in this series, all will be posted as a response
>to this one. If anyone has any issues with these being applied, please
>let me know.
>
>Re
On Tue 04 Sep 04:01 PDT 2018, Baolin Wang wrote:
> diff --git a/Documentation/ABI/testing/sysfs-class-led-trigger-pattern
> b/Documentation/ABI/testing/sysfs-class-led-trigger-pattern
[..]
> +What:/sys/class/leds//hw_pattern
> +Date:September 2018
> +KernelVersion:
If BUG_ON() is used instead of BUG(), it means that probably the
preferred outcome is to not BUG(), therefore the condition tested should
be unlikely().
However, when CONFIG_PROFILE_ANNOTATED_BRANCHES is enabled, the hint is
disabled, to avoid generating false-positive warnings caused by
-Wmaybe-u
On Fri, Sep 7, 2018 at 9:40 AM, Josh Poimboeuf wrote:
> On Mon, Sep 03, 2018 at 03:59:44PM -0700, Andy Lutomirski wrote:
>> The SYSCALL64 trampoline has a couple of nice properties:
>>
>> - The usual sequence of SWAPGS followed by two GS-relative accesses to
>>set up RSP is somewhat slow beca
On Fri, Sep 7, 2018 at 5:04 PM, Linus Torvalds
wrote:
> On Fri, Sep 7, 2018 at 12:54 PM Thomas Gleixner wrote:
>>
>> > - We execute from an extra page and read from another extra page
>> > during the syscall. (The latter is because we need to use a relative
>> > addressing mode to find sp1 -- i
On 07/09/18 23:41, Arnd Bergmann wrote:
Could you add a comment about -Wmaybe-uninitialized next to the definition?
Otherwise that is easily lost.
Also, I see that the file has two separate definitions of BUG_ON(), and the
other one does have an unlikely() in it already. Can you change both
On 9/4/18 2:28 PM, Daniel Jordan wrote:
> Pavel Tatashin, Ying Huang, and I are excited to be organizing a performance
> and scalability microconference this year at Plumbers[*], which is happening
> in Vancouver this year. The microconference is scheduled for the morning of
> the second day (W
On Fri, 7 Sep 2018 14:50:59 +0200
Peter Oberparleiter wrote:
> On 06.09.2018 18:42, Masami Hiramatsu wrote:
> > Peter Oberparleiter wrote:
> >> I've attached a quick fix that should address both problems. I'd
> >> appreciate if this patch could get some testing before I post proper fix
> >> patc
On Fri, Sep 07, 2018 at 04:13:35PM +0200, Arnd Bergmann wrote:
> On Fri, Sep 7, 2018 at 2:55 PM Guo Ren wrote:
> >
> > On Fri, Sep 07, 2018 at 10:14:38AM +0200, Arnd Bergmann wrote:
> > > On Fri, Sep 7, 2018 at 5:04 AM Guo Ren wrote:
> > > > On Thu, Sep 06, 2018 at 04:31:16PM +0200, Arnd Bergmann
From: Long Li
With offset defined in rdata, transport functions need to look at this
offset when reading data into the correct places in pages.
Signed-off-by: Long Li
---
fs/cifs/cifsproto.h | 4 +++-
fs/cifs/cifssmb.c | 1 +
fs/cifs/connect.c | 5 +++--
fs/cifs/file.c | 52 +++
From: Long Li
It's possible that the page offset is non-zero in the pages in a request,
change the function to calculate the correct data buffer length.
Signed-off-by: Long Li
---
fs/cifs/transport.c | 20 +---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/fs/c
From: Long Li
Add a function to allocate wdata without allocating pages for data
transfer. This gives the caller an option to pass a number of pages that
point to the data buffer to write to.
wdata is reponsible for free those pages after it's done.
Signed-off-by: Long Li
---
fs/cifs/cifsglob
From: Long Li
With direct read/write functions implemented, add them to file_operations.
Dircet I/O is used under two conditions:
1. When mounting with "cache=none", CIFS uses direct I/O for all user file
data transfer.
2. When opening a file with O_DIRECT, CIFS uses direct I/O for all data
tran
From: Long Li
When issuing SMB writes, pass along the write data page offset to transport.
Signed-off-by: Long Li
---
fs/cifs/cifssmb.c | 1 +
fs/cifs/smb2pdu.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 503e0ed..0a57c61 100644
--- a/fs/ci
From: Long Li
The RDMA send function needs to look at offset in the request pages, and
send data starting from there.
Signed-off-by: Long Li
---
fs/cifs/smbdirect.c | 27 +++
1 file changed, 19 insertions(+), 8 deletions(-)
diff --git a/fs/cifs/smbdirect.c b/fs/cifs/sm
From: Long Li
With direct I/O read, we transfer the data directly from transport layer to
the user data buffer.
Change in v3: added support for kernel AIO
Signed-off-by: Long Li
---
fs/cifs/cifsfs.h | 1 +
fs/cifs/cifsglob.h | 5 ++
fs/cifs/file.c | 209 +
From: Long Li
When calculating signature for the packet, it needs to read into the
correct page offset for the data.
Signed-off-by: Long Li
---
fs/cifs/cifsencrypt.c | 9 +
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index
From: Long Li
Encryption function needs to read data starting page offset from input
buffer.
This doesn't affect decryption path since it allocates its own page
buffers.
Signed-off-by: Long Li
---
fs/cifs/smb2ops.c | 20 +---
1 file changed, 13 insertions(+), 7 deletions(-)
d
From: Long Li
Add a function to allocate rdata without allocating pages for data
transfer. This gives the caller an option to pass a number of pages
that point to the data buffer.
rdata is reponsible for free those pages after it's done.
Signed-off-by: Long Li
---
fs/cifs/cifsglob.h | 3 +--
From: Long Li
RDMA recv function needs to place data to the correct place starting at
page offset.
Signed-off-by: Long Li
---
fs/cifs/smbdirect.c | 18 +++---
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index 6141e3c..ba5
From: Long Li
It's possible that the offset is non-zero in the page to send, change the
function to pass this offset to socket.
Signed-off-by: Long Li
---
fs/cifs/transport.c | 14 ++
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/fs/cifs/transport.c b/fs/cifs/transp
From: Long Li
It is not necessary to deregister a memory registration after it has been
successfully invalidated.
Signed-off-by: Long Li
---
fs/cifs/smbdirect.c | 82 ++---
1 file changed, 41 insertions(+), 41 deletions(-)
diff --git a/fs/cifs/s
From: Long Li
Introduce a function rqst_page_get_length to return the page offset and
length for a given page in smb_rqst. This function is to be used by
following patches.
Signed-off-by: Long Li
---
fs/cifs/cifsproto.h | 3 +++
fs/cifs/misc.c | 17 +
2 files changed, 20
From: Long Li
This patch set implements direct I/O.
In normal code path (even with cache=none), CIFS copies I/O data from
user-space to kernel-space for security reasons of possible protocol
required signing and encryption on user data.
With this patch set, CIFS passes the I/O data directly fro
From: Long Li
Change code to pass the correct page offset during memory registration for
RDMA read/write.
Signed-off-by: Long Li
---
fs/cifs/smb2pdu.c | 18 --
fs/cifs/smbdirect.c | 29 +
fs/cifs/smbdirect.h | 2 +-
3 files changed, 34 insertions(
From: Long Li
With direct I/O write, user supplied buffers are pinned to the memory and data
are transferred directly from user buffers to the transport layer.
Change in v3: added support for kernel AIO
Signed-off-by: Long Li
---
fs/cifs/cifsfs.h | 1 +
fs/cifs/file.c | 195 ++
On Fri, Sep 07, 2018 at 10:13:13AM -0500, Rob Herring wrote:
> On Thu, Sep 6, 2018 at 8:05 AM Arnd Bergmann wrote:
> >
> > On Thu, Sep 6, 2018 at 4:13 AM Guo Ren wrote:
> > >
> > > On Wed, Sep 05, 2018 at 07:43:10PM -0500, Rob Herring wrote:
> > > > On Wed, Sep 5, 2018 at 7:10 AM Guo Ren wrote:
On Fri, Sep 07, 2018 at 10:51:15AM +0200, Benjamin Tissoires wrote:
> From: Benjamin Tissoires
>
> Prior to commit 190d7f02ce8e ("HID: input: do not increment usages when
> a duplicate is found") from the v4.18 kernel, HID used to shift the
> event codes if a duplicate usage was found. This ended
On Saturday, September 8, 2018 4:05 AM, Andi Kleen wrote:
> > How would you realize the function of saving/restoring the lbr stack on the
> host?
> >
> > Here, we create a perf event on the host (please see
> guest_lbr_event_create on patch 7), which essentially satisfies all the
> conditions (e.g.
On Sat, Sep 8, 2018 at 2:28 AM Dave Hansen wrote:
> The vsyscall page is weird. It is in what is traditionally part of the
> kernel address space. But, it has user permissions and we handle faults
> on it like we would on a user page: interrupts on.
>
> Right now, we handle vsyscall emulation in
On Sat, Sep 8, 2018 at 2:25 AM Dave Hansen wrote:
> We will shortly be using this check in two locations. Put it in
> a helper before we do so.
[...]
> +/*
> + * The (legacy) vsyscall page is the long page in the kernel portion
> + * of the address space that has user-accessible permissions.
> +
On Sat, Sep 8, 2018 at 2:22 AM Dave Hansen wrote:
> +* Kernel-mode access to the user address space should only occur
> +* inside well-defined areas of code listed in the exception
Actually, not areas, but single whitelisted instructions. It would
probably be nice to say that more
On 9/7/2018 10:38 AM, Alan Stern wrote:
> On Fri, 7 Sep 2018, Daniel Lustig wrote:
>
>> On 9/7/2018 9:09 AM, Will Deacon wrote:
>>> On Fri, Sep 07, 2018 at 12:00:19PM -0400, Alan Stern wrote:
On Thu, 6 Sep 2018, Andrea Parri wrote:
>> Have you noticed any part of the generic code tha
On Fri, Sep 7, 2018 at 12:54 PM Thomas Gleixner wrote:
>
> > - We execute from an extra page and read from another extra page
> > during the syscall. (The latter is because we need to use a relative
> > addressing mode to find sp1 -- it's the same *cacheline* we'd use
> > anyway, but we're acces
On 09/07/2018 09:37 AM, John Johansen wrote:
> hey Tony,
>
> thanks for the patch, I am curious did you're investigation look
> into what parts of DEFINE_AUDIT_SK are causing the issue?
Hi JJ.
Attached are the perf annotations for DEFINE_AUDIT_SK (percentages are relative
to the fn).
Our ke
On Fri, Sep 07, 2018 at 10:07:39PM +, Max Asbock wrote:
> At boot time the acpi_power_meter driver greets users of non-IBM systems with
> the message:
>
> "Ignoring unsafe software power cap".
>
> This message is generally interpreted as meaning: The system is
> operating under an un
> On Sep 7, 2018, at 12:49 PM, Dave Hansen wrote:
>
>
> From: Dave Hansen
>
> The vsyscall page is weird. It is in what is traditionally part of the
> kernel address space. But, it has user permissions and we handle faults
> on it like we would on a user page: interrupts on.
>
> Right no
Fix the cell specification mechanism to allow cells to be pre-created
without having to specify at least one address (the addresses will be
upcalled for).
This allows the cell information preload service to avoid the need to issue
loads of DNS lookups during boot to get the addresses for each cell
I can see it in dev, thanks for merging. ;)
On 2018/9/8 6:38, Jaegeuk Kim wrote:
> I merged as one. Please check dev. :)
>
> On 09/06, Chao Yu wrote:
>> generic/019 reports below error:
>>
>> __quota_error: 1160 callbacks suppressed
>> Quota error (device zram1): write_blk: dquota write failed
On 09/07/2018 03:34 PM, jgka...@fb.com wrote:
> Here is the third version of the patchset.
>
> Changes since the last patchset:
> - Updated commit message of first patch to clarify fixes
> - Add ack from Roman
>
> There should be no code changes since the last patchset.
>
> Let me know if any im
> On Sep 7, 2018, at 12:48 PM, Dave Hansen wrote:
>
>
> From: Dave Hansen
>
> We pass around a variable called "error_code" all around the page
> fault code. Sounds simple enough, especially since "error_code" looks
> like it exactly matches the values that the hardware gives us on the
> s
On Fri, Sep 07, 2018 at 11:10:21PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 3.18.122 release.
> There are 29 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me kno
On Fri, Sep 07, 2018 at 11:09:56PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.4.155 release.
> There are 47 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know
On 09/07/2018 03:21 PM, Andy Lutomirski wrote:
>> +static void
>> +do_kern_addr_space_fault(struct pt_regs *regs, unsigned long hw_error_code,
>> + unsigned long address)
>> +{
>
> Can you add a comment above this documenting *when* it’s called? Is
> it all faults, !user_mode faults, or
On Fri, Sep 07, 2018 at 11:08:54PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.14.69 release.
> There are 89 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know
When reducing ring buffer size, pages are removed by scheduling a work
item on each CPU for the corresponding CPU ring buffer. After the pages
are removed from ring buffer linked list, the pages are free()d in a
tight loop. The loop does not give up CPU until all pages are removed.
In a worst case
On 09/07/2018 02:34 AM, Michal Hocko wrote:
> On Thu 06-09-18 15:53:34, Shuah Khan wrote:
> [...]
>> A few critical allocations could be satisfied and root cgroup prevails. It
>> is not the
>> intent to have exclusivity at the expense of the kernel.
>
> Well, it is not "few critical allocations".
> On Sep 7, 2018, at 12:48 PM, Dave Hansen wrote:
>
>
> From: Dave Hansen
>
> The page fault handler (__do_page_fault()) basically has two sections:
> one for handling faults in the kernel porttion of the address space
> and another for faults in the user porttion of the address space.
>
The comment above asm_volatile_goto mentions working around a GCC bug,
and links to a bug report that claims this has been fixed in newer
versions of GCC. Testing shows that this was resolved in GCC 4.8.2.
asm_volatile_goto should also be defined for other compilers that
support asm goto.
Signed-
On Fri, Sep 7, 2018 at 4:01 PM Paul Burton wrote:
>
> Hi Rob,
>
> On Fri, Sep 07, 2018 at 03:29:03PM -0500, Rob Herring wrote:
> > On Fri, Sep 7, 2018 at 1:55 PM Paul Burton wrote:
> > > The CONFIG_CMDLINE-related logic in early_init_dt_scan_chosen() falls
> > > back to copying CONFIG_CMDLINE int
At boot time the acpi_power_meter driver greets users of non-IBM systems with
the message:
"Ignoring unsafe software power cap".
This message is generally interpreted as meaning: The system is operating under
an unsafe power cap and Linux is ignoring this fact, thus living dangerousl
4.14-stable review patch. If anyone has any objections, please let me know.
--
From: Ming Lei
commit b233f127042dba991229e3882c6217c80492f6ef upstream.
Runtime PM isn't ready for blk-mq yet, and commit 765e40b675a9 ("block:
disable runtime-pm for blk-mq") tried to disable it.
4.14-stable review patch. If anyone has any objections, please let me know.
--
From: Lars-Peter Clausen
commit 5a4e33c1c53ae7d4425f7d94e60e4458a37b349e upstream.
Fix the displayed phase for the ad9523 driver. Currently the most
significant decimal place is dropped and all othe
> -Original Message-
> From: David Miller [mailto:da...@davemloft.net]
> Sent: Friday, September 07, 2018 10:31 AM
> To: Keller, Jacob E
> Cc: s...@canb.auug.org.au; net...@vger.kernel.org; linux-n...@vger.kernel.org;
> linux-kernel@vger.kernel.org; Kirsher, Jeffrey T
> ;
> Bowers, Andrew
Hi Igor,
On Fri, Sep 07, 2018 at 09:03:02PM +0300, Igor Stoppa wrote:
> diff --git a/arch/mips/include/asm/bug.h b/arch/mips/include/asm/bug.h
> index 745dc160a069..02101b54aec2 100644
> --- a/arch/mips/include/asm/bug.h
> +++ b/arch/mips/include/asm/bug.h
> @@ -31,7 +31,7 @@ static inline void _
4.14-stable review patch. If anyone has any objections, please let me know.
--
From: Johan Hovold
commit 5c8b84f410b3819d14cb1ebf32e4b3714b5a6e0b upstream.
Do not set the system power-off callback and omap power-off rtc pointer
until we're done setting up our device to avoid l
4.18-stable review patch. If anyone has any objections, please let me know.
--
From: xiao jin
commit 54648cf1ec2d7f4b6a71767799c45676a138ca24 upstream.
We find the memory use-after-free issue in __blk_drain_queue()
on the kernel 4.14. After read the latest kernel 4.18-rc6 we
t
4.18-stable review patch. If anyone has any objections, please let me know.
--
From: Bart Van Assche
commit 6bad9b210a228d2fe0e0efe26d9b115348529cee upstream.
This new function will be used in a later patch to verify whether a
queue has been dissociated from the cgroup control
4.18-stable review patch. If anyone has any objections, please let me know.
--
From: Bart Van Assche
commit 24ecc3585348b616993a3c4d6dc2c6b8007e358c upstream.
Several block drivers call alloc_disk() followed by put_disk() if
something fails before device_add_disk() is called w
4.18-stable review patch. If anyone has any objections, please let me know.
--
From: Ming Lei
commit b233f127042dba991229e3882c6217c80492f6ef upstream.
Runtime PM isn't ready for blk-mq yet, and commit 765e40b675a9 ("block:
disable runtime-pm for blk-mq") tried to disable it.
On Fri, Sep 7, 2018 at 2:54 PM Guenter Roeck wrote:
>
> On Fri, Sep 7, 2018 at 2:34 PM Greg Kroah-Hartman
> wrote:
> >
> > 4.9-stable review patch. If anyone has any objections, please let me know.
> >
>
> Do your scripts have a bad hair day ? The subject says 4.18.
>
Hmm, I suspect it is the gm
On Fri, Sep 7, 2018 at 2:34 PM Greg Kroah-Hartman
wrote:
>
> 4.9-stable review patch. If anyone has any objections, please let me know.
>
Do your scripts have a bad hair day ? The subject says 4.18.
Guenter
> --
>
> From: Chirantan Ekbote
>
> commit d28c756caee6e414d9ba367d0b9
This patch series extends CFS with support for coscheduling. The
implementation is versatile enough to cover many different coscheduling
use-cases, while at the same time being non-intrusive, so that behavior of
legacy workloads does not change.
Peter Zijlstra once called coscheduling a "scalabili
Move around the storage location of the scheduling entity references
of task groups. Instead of linking them from the task_group struct,
link each SE from the CFS runqueue itself with a new field "my_se".
This resembles the "my_q" field that is already available, just in
the other direction.
Adju
4.4-stable review patch. If anyone has any objections, please let me know.
--
From: Matthew Auld
commit c11c7bfd213495784b22ef82a69b6489f8d0092f upstream.
Operating on a zero sized GEM userptr object will lead to explosions.
Fixes: 5cc9ed4b9a7a ("drm/i915: Introduce mapping o
Add resched_cpu_locked(), which still works as expected, when it is called
while we already hold a runqueue lock from a different CPU.
There is some optimization potential by merging the logic of resched_curr()
and resched_cpu_locked() to avoid IPIs when calls to both functions happen.
Signed-off
The mini2440 computer uses "active high" to signal that the "write protect"
of the inserted MMC is set. The current code uses the opposite, leading to
a wrong detection of write protection. The solution is simply to use
".wprotect_invert = 1" in the description of the MMC.
Signed-off-by: Cedric Ro
From: "Maciej S. Szmigiero"
Date: Fri, 7 Sep 2018 20:15:22 +0200
> Commit 3559d81e76bf ("r8169: simplify rtl_hw_start_8169") changed order of
> two register writes:
> 1) Caused RxConfig to be written before TX / RX is enabled,
> 2) Caused TxConfig to be written before TX / RX is enabled.
>
> At
Prepare for future changes and refactor sync_throttle() to work with
a different set of arguments.
Signed-off-by: Jan H. Schönherr
---
kernel/sched/fair.c | 13 ++---
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 5cad364e3a8
Factor out the logic to retrieve the parent CFS runqueue of another
CFS runqueue into its own function and replace open-coded variants.
Signed-off-by: Jan H. Schönherr
---
kernel/sched/fair.c | 18 --
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/kernel/sched/fai
Running:
scripts/checkpatch.pl -f arch/arm/mach-s3c24xx/mach-mini2440.c
revealed several errors and warnings.
They were all removed, except one which is an #if 0 around the declaration
of a gpio pin. This needs some more investigation and I prefer to let it
here. This is not some dead code.
'
With scheduling domains sufficiently prepared, we can now initialize
the full hierarchy of runqueues and link it with the already existing
bottom level, which we set up earlier.
Signed-off-by: Jan H. Schönherr
---
kernel/sched/core.c| 1 +
kernel/sched/cosched.c | 76 +++
Scheduled task groups will bring coscheduling to Linux.
The actual functionality will be added successively.
Signed-off-by: Jan H. Schönherr
---
init/Kconfig | 11 +++
kernel/sched/Makefile | 1 +
kernel/sched/cosched.c | 9 +
3 files changed, 21 insertions(+)
creat
On 09/07/2018 02:06 PM, Sean Christopherson wrote:
>> The page fault handler (__do_page_fault()) basically has two sections:
>> one for handling faults in the kernel porttion of the address space
>> and another for faults in the user porttion of the address space.
> %s/porttion/portion
Fixed, tha
4.4-stable review patch. If anyone has any objections, please let me know.
--
From: Mikulas Patocka
commit 8c5b044299951acd91e830a688dd920477ea1eda upstream.
I have a USB display adapter using the udlfb driver and I use it on an ARM
board that doesn't have any graphics card. W
4.4-stable review patch. If anyone has any objections, please let me know.
--
From: Richard Weinberger
commit 59965593205fa4044850d35ee3557cf0b7edcd14 upstream.
In ubifs_jnl_update() we sync parent and child inodes to the flash,
in case of xattrs, the parent inode (AKA host in
The code path is not yet adjusted for coscheduling. Disable
it for now.
Signed-off-by: Jan H. Schönherr
---
kernel/sched/fair.c | 10 ++
1 file changed, 10 insertions(+)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 30e5ff30f442..8504790944bf 100644
--- a/kernel/sched/fai
From: Florian Fainelli
Date: Fri, 7 Sep 2018 11:09:02 -0700
> There is no way for user-space to know what a given DSA network device's
> tagging protocol is. Expose this information through a dsa/tagging
> attribute which reflects the tagging protocol currently in use.
>
> This is helpful for c
>> + * Only do the expensive exception table search when we might be at
>> + * risk of a deadlock:
>> + * 1. We failed to acquire mmap_sem, and
>> + * 2. The access was an explicit kernel-mode access
>> + *(X86_PF_USER=0).
>
> Might be worth reminding the reader that X86_
The cpu argument supplied to all callers of ___update_load_sum() is used
in accumulate_sum() to scale load values according to the CPU capacity.
While we should think about that at some point, it is out-of-scope for now.
Also, it does not matter on homogeneous system topologies.
Update all callers
4.4-stable review patch. If anyone has any objections, please let me know.
--
From: Adrian Hunter
commit 99cbbe56eb8bede625f410ab62ba34673ffa7d21 upstream.
When the number of queues grows beyond 32, the array of queues is
resized but not all members were being copied. Fix by a
Provide variants of the task group CFS traversal constructs that also
reach the hierarchical runqueues. Adjust task group management functions
where necessary.
The most changes are in alloc_fair_sched_group(), where we now need to
be a bit more careful during initialization.
Signed-off-by: Jan H.
The rq_of() function is used everywhere. With the introduction of
hierarchical runqueues, we could modify rq_of() to return the
corresponding queue. In fact, no change would be necessary for that.
However, many code paths do not handle a hierarchical runqueue
adequately. Thus, we introduce variant
4.4-stable review patch. If anyone has any objections, please let me know.
--
From: Christian Brauner
commit 82c9a927bc5df6e06b72d206d24a9d10cced4eb5 upstream.
When running in a container with a user namespace, if you call getxattr
with name = "system.posix_acl_access" and siz
Even with coscheduling, we define the fields rq->nr_running and rq->load
of per-CPU runqueues to represent the total amount of tasks and the
total amount of load on that CPU, respectively, so that existing code
continues to work as expected.
Make sure to still account load changes on per-CPU runqu
Add a new loop constuct for_each_owned_sched_entity(), which iterates
over all owned scheduling entities, stopping when it encounters a
leader change.
This allows relatively straight-forward adaptations of existing code,
where the leader only handles that part of the hierarchy it actually
owns.
I
Enqueuing and dequeuing of tasks (or entities) are a general activities
that span across leader boundaries. They start from the bottom of the
runqueue hierarchy and bubble upwards, until they hit their terminating
condition (for example, enqueuing stops when the parent entity is already
enqueued).
> -Original Message-
> From: Wang, Dongsheng [mailto:dongsheng.w...@hxt-semitech.com]
> Sent: Friday, September 07, 2018 5:41 AM
> To: Kirsher, Jeffrey T ;
> sergei.shtyl...@cogentembedded.com
> Cc: Keller, Jacob E ; da...@davemloft.net; intel-
> wired-...@lists.osuosl.org; net...@vger.k
The weight of an SD-SE is defined to be the average weight of all
runqueues that are represented by the SD-SE. Hence, its weight
should change whenever one of the child runqueues changes its
weight. However, as these are two different hierarchy levels,
they are protected by different locks. To redu
Modify some of the core scheduler paths, which function as entry points
into the CFS scheduling class and which are activities where the leader
operates on behalf of the group.
There are (a) handling the tick, (b) picking the next task from the
runqueue, (c) setting a task to be current, and (d) p
The aggregated SD-SE weight is updated lock-free to avoid contention
on the higher level. This also means, that we have to be careful
with intermediate values as another CPU could pick up the value and
perform actions based on it.
Within reweight_entity() there is such a place, where weight is rem
Move struct rq_flags around to keep future commits crisp.
Signed-off-by: Jan H. Schönherr
---
kernel/sched/sched.h | 26 +-
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index b8c8dfd0e88d..cd3a32ce8fc6 100644
The scheduler is operational before we have the necessary information
about scheduling domains, which would allow us to set up the runqueue
hierarchy. Because of that, we have to postpone the "real"
initialization a bit. We cannot not totally skip all initialization,
though, because all the adapted
The function cfs_rq_util_change() notifies frequency governors of
utilization changes, so that they can be scheduler driven. This is
coupled to per CPU runqueue statistics. So, don't do anything
when called for non-CPU runqueues.
Signed-off-by: Jan H. Schönherr
---
kernel/sched/fair.c | 11 +
3.18-stable review patch. If anyone has any objections, please let me know.
--
From: Eric W. Biederman
commit 36476beac4f8ca9dc7722790b2e8ef0e8e51034e upstream.
It is important that all maps are less than PAGE_SIZE
or else setting the last byte of the buffer to '0'
could write
With coscheduling the number of required classes is twice the depth of
the scheduling domain hierarchy. For a 256 CPU system, there are eight
levels at most. Adjust the number of subclasses, so that lockdep can
still be used on such systems.
Signed-off-by: Jan H. Schönherr
---
include/linux/lock
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