On Fri, 27 Sep 2019 12:04:03 +0200, Paul Kocialkowski wrote:
> Xylon is an electronics company that produces FPGA hardware block designs
> optimized for Xilinx FPGAs.
>
> Signed-off-by: Paul Kocialkowski
> ---
> Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
> 1 file changed, 2 i
In iwl_pcie_ctxt_info_gen3_init there are cases that the allocated dma
memory is leaked in case of error.
DMA memories prph_scratch, prph_info, and ctxt_info_gen3 are allocated
and initialized to be later assigned to trans_pcie. But in any error case
before such assignment the allocated memories sh
On Tue, Sep 3, 2019 at 3:27 PM Palmer Dabbelt wrote:
>
> On Wed, 28 Aug 2019 10:52:05 PDT (-0700), l...@amacapital.net wrote:
> >
> >
> >> On Aug 25, 2019, at 2:59 PM, Kees Cook wrote:
> >>
> >>> On Thu, Aug 22, 2019 at 01:55:22PM -0700, David Abdurachmanov wrote:
> >>> This patch was extensively
The Aspeed SOCs provide some interrupts through the System Control
Unit registers. Add an interrupt controller that provides these
interrupts to the system.
Signed-off-by: Eddie James
---
Changes since v1:
- add a spinlock to protect read-modify-write operation for irq masking
- use readl/write
Add nodes for the interrupt controllers provided by the SCU.
Signed-off-by: Eddie James
---
arch/arm/boot/dts/aspeed-g6.dtsi | 18 ++
1 file changed, 18 insertions(+)
diff --git a/arch/arm/boot/dts/aspeed-g6.dtsi b/arch/arm/boot/dts/aspeed-g6.dtsi
index 3a1422f..d89f1e6 100644
-
The Aspeed SOCs provide some interrupts through the System Control
Unit registers. Add an interrupt controller that provides these
interrupts to the system. Add the interrupt controller to the AST25XX
and AST26XX devicetrees.
Changes since v1:
- add a spinlock to protect read-modify-write operati
Add a node for the interrupt controller provided by the SCU.
Signed-off-by: Eddie James
---
arch/arm/boot/dts/aspeed-g5.dtsi | 11 ++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
index e8feb8b..450c2d2
Document the Aspeed SCU interrupt controller and add an include file
for the interrupts it provides.
Signed-off-by: Eddie James
---
.../interrupt-controller/aspeed,ast2xxx-scu-ic.txt | 26 ++
MAINTAINERS| 7 ++
.../interrupt-contro
On Fri, 27 Sep 2019 15:47:03 -0400 Qian Cai wrote:
> On architectures like s390, arch_free_page() could mark the page unused
> (set_page_unused()) and any access later would trigger a kernel panic.
> Fix it by moving arch_free_page() after all possible accessing calls.
>
> Hardware name: IBM 29
On 27 September 2019 9:19:49 pm AEST, David Hildenbrand
wrote:
>On 25.09.19 09:37, David Hildenbrand wrote:
>> On 10.09.19 18:39, David Hildenbrand wrote:
>>> We can simply store the pages in a list (page->lru), no need for a
>>> separate data structure (+ complicated handling). This is how mo
Hi Benoit,
thank you for the patch.
On Fri, Sep 27, 2019 at 7:49 PM Benoit Parrot wrote:
>
> On some board it is possible that the sensor 'powerdown' and or 'reset'
> pin might be controlled by gpio instead of being tied.
>
> To implement we add pm_runtime support which will handle the power
> u
On Fri, Sep 27, 2019 at 7:46 PM Benoit Parrot wrote:
>
> Switch to SPDX licensing and drop the redundant GPL text.
>
> Signed-off-by: Benoit Parrot
> ---
> drivers/media/i2c/ov2659.c | 14 +-
> 1 file changed, 1 insertion(+), 13 deletions(-)
>
Acked-by: Lad, Prabhakar
Cheers,
--Pra
Being const + weak breaks with some compilers that constant-propagate
from the weak symbol. This behavior is outside of the specification, but
in LLVM is chosen to match GCC's behavior.
LLVM's implementation was set in this patch:
https://github.com/llvm/llvm-project/commit/f49573d1eedcf1e44893d5a
On Fri, Sep 27, 2019 at 12:49 AM Jose Abreu wrote:
>
> The sizeof(cfg->key) is != ARRAY_SIZE(cfg->key). Fix it.
I think the warning was from -Wsizeof-array-div.
>
> Reported-by: kbuild test robot
> Reported-by: Nick Desaulniers
I may have reported the kbuild link, but scanning my email, there
> On Sep 27, 2019, at 12:03 PM, Shuah Khan wrote:
>
> On 9/27/19 12:44 PM, Song Liu wrote:
>> On Thu, Sep 26, 2019 at 6:14 PM Shuah Khan wrote:
>>>
>>> make TARGETS=bpf kselftest fails with:
>>>
>>> Makefile:127: tools/build/Makefile.include: No such file or directory
>>>
>>> When the bpf
On Fri, 2019-09-27 at 13:48 -0700, Andrew Morton wrote:
> On Fri, 27 Sep 2019 15:47:03 -0400 Qian Cai wrote:
>
> > On architectures like s390, arch_free_page() could mark the page unused
> > (set_page_unused()) and any access later would trigger a kernel panic.
> > Fix it by moving arch_free_page
On 27/09/2019 18.11, Rob Herring wrote:
> On Mon, Sep 23, 2019 at 12:15:13PM +0200, Kurt Kanzenbach wrote:
>> From: Rasmus Villemoes
>>
>> This adds Device Tree binding documentation for the external interrupt
>> lines with configurable polarity present on some Layerscape SOCs.
>>
>> Signed-off-by
Looks good,
Reviewed-by: Christoph Hellwig
This patch adds a quirk disabling keyboard backlight support for the
Dell Inspiron 1012 and 1018.
Those models wrongly report supporting keyboard backlight control
features (through SMBIOS tokens) even though they're not equipped with
a backlit keyboard. This led to broken controls being exposed
t
Hi,
Some doc comments/fixes below...
On 9/12/19 1:06 PM, Chang S. Bae wrote:
> From: Thomas Gleixner
>
> Explain how the GS/FS based addressing can be utilized in user space
> applications along with the differences between the generic prctl() based
> GS/FS base control and the FSGSBASE version
On Fri, 2019-09-27 at 14:02 -0700, Andrew Morton wrote:
> On Fri, 27 Sep 2019 15:47:03 -0400 Qian Cai wrote:
>
> > On architectures like s390, arch_free_page() could mark the page unused
> > (set_page_unused()) and any access later would trigger a kernel panic.
> > Fix it by moving arch_free_page
Hi Jiri,
On Tue Sep 24, 2019 at 10:33 AM Jiri Olsa wrote:
> On Tue, Sep 17, 2019 at 06:30:52AM -0700, Daniel Xu wrote:
>
> SNIP
>
> > + PERF_FORMAT_MAX = 1U << 5, /* non-ABI */
> > };
> >
> > #define PERF_ATTR_SIZE_VER064 /* sizeof first published
> > struct */
>
On Fri, 27 Sep 2019 14:12:42 +0200, Markus Elfring wrote:
> > Updated other gotos to have correct errno returned, too.
>
> How do you think about to add a jump target here?
>
>
> > +++ b/drivers/net/ethernet/netronome/nfp/abm/cls.c
> > @@ -176,8 +176,10 @@ nfp_abm_u32_knode_replace(struct nfp_
Being const + weak breaks with some compilers that constant-propagate
from the weak symbol. This behavior is outside of the specification, but
in LLVM is chosen to match GCC's behavior.
LLVM's implementation was set in this patch:
https://github.com/llvm/llvm-project/commit/f49573d1eedcf1e44893d5a
Hi,
On Thu, Sep 26, 2019 at 10:02 PM Light Hsieh wrote:
>
> Refine mtk_pinconf_set()/mtk_pinconf_get() for backward compatibility to
> previous Mediatek's bias-pull usage.
MediaTek
> In PINCTRL_MTK that use pinctrl-mtk-common.c, bias-pull setting for pins
> with 2 pull resistors can be specifie
If kzalloc() returns NULL, the error path doesn't stop the flow of
control from entering rtw_hal_read_chip_version() which dereferences the
null pointer. Fix this by adding a 'goto' to the error path to more
gracefully handle the issue and avoid proceeding with initialization
steps that we're no lo
On 9/19/19 3:24 PM, Mina Almasry wrote:
> A follow up patch in this series adds hugetlb cgroup uncharge info the
> file_region entries in resv->regions. The cgroup uncharge info may
> differ for different regions, so they can no longer be coalesced at
> region_add time. So, disable region coalescin
Looks sensible to me:
Reviewed-by: Christoph Hellwig
Add WARN_ON_ONCE() checks in kvm_register_{read,write}() to detect reg
values that would cause KVM to overflow vcpu->arch.regs. Change the reg
param to an 'int' to make it clear that the reg index is unverified.
Open code the RIP and RSP accessors so as to avoid pointless overhead of
WARN_ON_ONCE
Add helpers to prettify code that tests and/or marks whether or not a
register is available and/or dirty.
Suggested-by: Vitaly Kuznetsov
Signed-off-by: Sean Christopherson
---
arch/x86/kvm/kvm_cache_regs.h | 45 +--
arch/x86/kvm/vmx/nested.c | 4 ++--
arch/x
Now that indexing into arch.regs is either protected by WARN_ON_ONCE or
done with hardcoded enums, combine all definitions for registers that
are tracked by regs_avail and regs_dirty into 'enum kvm_reg'. Having a
single enum type will simplify additional cleanup related to regs_avail
and regs_dirt
Write the desired L2 CR3 into vmcs02.GUEST_CR3 during nested VM-Enter
instead of deferring the VMWRITE until vmx_set_cr3(). If the VMWRITE
is deferred, then KVM can consume a stale vmcs02.GUEST_CR3 when it
refreshes vmcs12->guest_cr3 during nested_vmx_vmexit() if the emulated
VM-Exit occurs withou
Handle caching CR3 (from VMX's VMCS) into struct kvm_vcpu via the common
cache_reg() callback and drop the dedicated decache_cr3(). The name
decache_cr3() is somewhat confusing as the caching behavior of CR3
follows that of GPRs, RFLAGS and PDPTRs, (handled via cache_reg()), and
has nothing in com
Rework vmx_set_rflags() to avoid the extra code need to handle emulation
of real mode and invalid state when unrestricted guest is disabled. The
primary reason for doing so is to avoid the call to vmx_get_rflags(),
which will incur a VMREAD when RFLAGS is not already available. When
running neste
Capture struct vcpu_vmx in a local variable to improve the readability
of vmx_{g,s}et_rflags().
No functional change intended.
Signed-off-by: Sean Christopherson
---
arch/x86/kvm/vmx/vmx.c | 20 +++-
1 file changed, 11 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kvm/vmx
Skip the VMWRITE to update GUEST_CR3 if CR3 is not available, i.e. has
not been read from the VMCS since the last VM-Enter. If vcpu->arch.cr3
is stale, kvm_read_cr3(vcpu) will refresh vcpu->arch.cr3 from the VMCS,
meaning KVM will do a VMREAD and then VMWRITE the value it just pulled
from the VMCS
*sigh*
v2 was shaping up to be a trivial update, until I started working on
Vitaly's suggestion to add a helper to test for register availability.
The primary purpose of this series is to fix a CR3 corruption in L2
reported by Reto Buerki when running with HLT interception disabled in L1.
On a ne
On Friday, September 27, 2019 6:07:56 PM CEST Natarajan, Janakarajan wrote:
> On 9/18/2019 11:34 AM, Natarajan, Janakarajan wrote:
> > This is advantageous because an IPI is not generated when a read_msr() is
> > executed on the local logical CPU thereby reducing the chance of having
> > APERF a
> On Sep 27, 2019, at 14:25, Randy Dunlap wrote:
>
> Hi,
> Some doc comments/fixes below...
>
> On 9/12/19 1:06 PM, Chang S. Bae wrote:
>> From: Thomas Gleixner
>>
[snip]
>> +There exist two mechanisms to read and write the FS/FS base address:
>
>
On Fri, Sep 27, 2019 at 1:43 PM Nick Desaulniers
wrote:
>
> On Fri, Sep 27, 2019 at 5:49 AM Peter Zijlstra wrote:
> > Barring LTO the above works for perf because of inter-translation-unit
> > function calls, which imply a compiler barrier.
> >
> > Now, when the compiler inlines, it looses that s
On Friday 27 September 2019 23:19:03 Pacien TRAN-GIRARD wrote:
> This patch adds a quirk disabling keyboard backlight support for the
> Dell Inspiron 1012 and 1018.
>
> Those models wrongly report supporting keyboard backlight control
> features (through SMBIOS tokens) even though they're not equi
On Fri, 27 Sep 2019 17:28:06 -0400 Qian Cai wrote:
> >
> > So I think you've moved the arch_free_page() to be after the final
> > thing which can access page contents, yes? If so, we should have a
> > comment in free_pages_prepare() to attmept to prevent this problem from
> > reoccurring as the
On 9/26/19 5:55 PM, Mina Almasry wrote:
> Provided we keep the existing controller untouched, should the new
> controller track:
>
> 1. only reservations, or
> 2. both reservations and allocations for which no reservations exist
> (such as the MAP_NORESERVE case)?
>
> I like the 'both' approach.
On Fri, Sep 27, 2019 at 3:43 AM Nicolas Saenz Julienne
wrote:
>
> On Fri, 2019-08-30 at 12:43 +0900, Masahiro Yamada wrote:
> > Commit 9012d011660e ("compiler: allow all arches to enable
> > CONFIG_OPTIMIZE_INLINING") allowed all architectures to enable
> > this option. A couple of build errors we
Hi,
On Thu, Sep 26, 2019 at 10:02 PM Light Hsieh wrote:
>
> Add support for pin configuration dump via catting
> /sys/kernel/debug/pinctrl/$platform_dependent_path/pinconf-pins.
> pinctrl framework had already support such dump. This patch implement the
> operation function pointer to fullfill th
On Fri, 27 Sep 2019 12:04:06 +0200, Paul Kocialkowski wrote:
> The Xylon LogiCVC display controller exports some GPIOs, which are
> exposed as a separate entity.
>
> Signed-off-by: Paul Kocialkowski
> ---
> .../bindings/gpio/xylon,logicvc-gpio.yaml | 69 +++
> 1 file changed,
On Fri, Sep 27, 2019 at 12:04:04PM +0200, Paul Kocialkowski wrote:
> The LogiCVC is a display engine which also exposes GPIO functionality.
> For this reason, it is described as a multi-function device that is expected
> to provide register access to its children nodes for gpio and display.
>
> Si
On Fri, Sep 27, 2019 at 2:59 PM Andrew Morton wrote:
>
> On Fri, 27 Sep 2019 17:28:06 -0400 Qian Cai wrote:
>
> > >
> > > So I think you've moved the arch_free_page() to be after the final
> > > thing which can access page contents, yes? If so, we should have a
> > > comment in free_pages_prepar
On Thu, Sep 26, 2019 at 05:09:12PM -0700, Atish Patra wrote:
> The Supervisor Binary Interface(SBI) specification[1] now defines a
> base extension that provides extendability to add future extensions
> while maintaining backward compatibility with previous versions.
> The new version is defined as
On Thu, Sep 26, 2019 at 05:09:13PM -0700, Atish Patra wrote:
> -#define SBI_CALL(which, arg0, arg1, arg2, arg3) ({ \
> +#define SBI_CALL(which, arg0, arg1, arg2, arg3) ({ \
Spurious whitespace change.
On Thu, Sep 26, 2019 at 05:09:15PM -0700, Atish Patra wrote:
> All SBI related macros can be reused by KVM RISC-V and userspace tools
> such as kvmtool, qemu-kvm. SBI calls can also be emulated by userspace
> if required. Any future vendor extensions can leverage this to emulate
> the specific exte
On Fri, Sep 27, 2019 at 11:25:13AM -0700, Paul Walmsley wrote:
> Atish Patra (1):
> RISC-V: Export kernel symbols for kvm
None of these have any current users, they should go in with the kvm
series once the virtualization spec has been finalized.
On Tue, Sep 24, 2019 at 05:15:56PM -0700, Palmer Dabbelt wrote:
> This is almost entirely a comment. The bug is unlikely to manifest on
> existing hardware because there is a timeout on load reservations, but
> manifests on QEMU because there is no timeout.
Given how many different lines of RISC-
On Mon, Sep 23, 2019 at 08:45:14AM +0800, Vincent Chen wrote:
> When the CONFIG_GENERIC_BUG is disabled by disabling CONFIG_BUG, if a
> kernel thread is trapped by BUG(), the whole system will be in the
> loop that infinitely handles the ebreak exception instead of entering the
> die function. To f
On 9/27/19 3:39 PM, Andy Shevchenko wrote:
On Fri, Sep 27, 2019 at 7:39 PM Pierre-Louis Bossart
wrote:
The problem with solution #1 is freeing orphaned pointer. It will work,
but it's simple is not okay from object life time prospective.
?? I don't get your point at all Andy.
Two allocations
On Mon, Sep 23, 2019 at 08:45:15AM +0800, Vincent Chen wrote:
> On RISC-V, when the kernel runs code on behalf of a user thread, and the
> kernel executes a WARN() or WARN_ON(), the user thread will be sent
> a bogus SIGTRAP. Fix the RISC-V kernel code to not send a SIGTRAP when
> a WARN()/WARN_ON
On Fri, Sep 27, 2019 at 2:44 PM Mike Kravetz wrote:
>
> On 9/19/19 3:24 PM, Mina Almasry wrote:
> > A follow up patch in this series adds hugetlb cgroup uncharge info the
> > file_region entries in resv->regions. The cgroup uncharge info may
> > differ for different regions, so they can no longer
In mlx5_fw_fatal_reporter_dump if mlx5_crdump_collect fails the
allocated memory for cr_data must be released otherwise there will be
memory leak. To fix this, this commit changes the return instruction
into goto error handling.
Fixes: 9b1f29823605 ("net/mlx5: Add support for FW fatal reporter dum
On Fri, Sep 27, 2019 at 3:08 PM Nick Desaulniers
wrote:
>
> So get_user() was passed a bad value/pointer from userspace? Do you
> know which of the tree calls to get_user() from sock_setsockopt() is
> failing? (It's not immediately clear to me how this patch is at
> fault, vs there just being a b
Looks ok:
Reviewed-by: Christoph Hellwig
On Fri, Sep 27, 2019 at 1:08 PM J. Bruce Fields wrote:
>
> Please pull nfsd changes from:
>
> git://linux-nfs.org/~bfields/linux.git tags/nfsd-5.4
Hmm. I styarted to pull, but then realized that the description
doesn't match the content at all.
You say:
> Highlights:
>
> - add a new k
On Mon, Sep 23, 2019 at 08:45:17AM +0800, Vincent Chen wrote:
> To make the code more straightforward, replacing the switch statement
> with if statement.
>
> Suggested-by: Paul Walmsley
> Signed-off-by: Vincent Chen
> ---
> arch/riscv/kernel/traps.c | 23 ---
> 1 file chang
On Fri, Sep 27, 2019 at 2:59 PM Mike Kravetz wrote:
>
> On 9/26/19 5:55 PM, Mina Almasry wrote:
> > Provided we keep the existing controller untouched, should the new
> > controller track:
> >
> > 1. only reservations, or
> > 2. both reservations and allocations for which no reservations exist
> >
On Thu, Aug 22, 2019 at 06:26:35AM -0300, Mauro Carvalho Chehab wrote:
> Em Mon, 19 Aug 2019 08:26:19 +0200
> Christoph Hellwig escreveu:
>
> > On Mon, Aug 19, 2019 at 08:09:04AM +0200, Borislav Petkov wrote:
> > > On Sun, Aug 18, 2019 at 10:29:35AM +0200, Christoph Hellwig wrote:
> > > > The s
Oh and s/rsicv/riscv/ in the subject, please.
On Fri, 2019-09-27 at 15:19 -0700, Christoph Hellwig wrote:
> On Thu, Sep 26, 2019 at 05:09:12PM -0700, Atish Patra wrote:
> > The Supervisor Binary Interface(SBI) specification[1] now defines a
> > base extension that provides extendability to add future extensions
> > while maintaining backward c
On 9/27/19 3:51 PM, Mina Almasry wrote:
> On Fri, Sep 27, 2019 at 2:59 PM Mike Kravetz wrote:
>>
>> On 9/26/19 5:55 PM, Mina Almasry wrote:
>>> Provided we keep the existing controller untouched, should the new
>>> controller track:
>>>
>>> 1. only reservations, or
>>> 2. both reservations and all
The pull request you sent on Fri, 27 Sep 2019 16:27:26 +0200:
> https://github.com/martinetd/linux tags/9p-for-5.4
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/9977b1a71488742606376c09e19e0074e4403cdf
Thank you!
--
Deet-doot-dot, I am a bot.
https://korg.wiki.kern
The pull request you sent on Thu, 26 Sep 2019 10:43:40 +0200:
> git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git
> tags/virtio-fs-5.4
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/8f744bdee4fefb17fac052c7418b830de2b59ac8
Thank you!
--
Deet-doot-dot,
In hgcm_call_preprocess_linaddr memory is allocated for bounce_buf but
is not released if copy_form_user fails. The release is added.
Fixes: 579db9d45cb4 ("virt: Add vboxguest VMMDEV communication code")
Signed-off-by: Navid Emamdoost
---
drivers/virt/vboxguest/vboxguest_utils.c | 4 +++-
1 fil
re:
https://lore.kernel.org/lkml/20190129204319.15238-1-jacob.e.kel...@intel.com/
Did anything happen with this patch?
Please send it to linux-kbu...@vger.kernel.org and
Cc: Masahiro Yamada
You can also add:
Acked-by: Randy Dunlap
Tested-by: Randy Dunlap
I was just about to fix this scri
This fixes an error with how the FDT blob is reserved in memblock.
An incorrect physical address calculation exposed the FDT header to
unintended corruption, which typically manifested with of_fdt_raw_init()
faulting during late boot after fdt_totalsize() returned a wrong value.
Systems with smalle
On Thu, Sep 26, 2019 at 10:29:34AM +0100, Andrew Murray wrote:
> Though I'd be just as happy if the csr_[read,write][l,] functions were
> renamed to mobiveil_csr_[read,write][l,].
Please do that instead, using such generic names as csr_* in a driver
is a bad idea, with or without a __ prefix.
> -Original Message-
> From: Randy Dunlap [mailto:rdun...@infradead.org]
> Sent: Friday, September 27, 2019 4:12 PM
> To: Keller, Jacob E
> Cc: intel-wired-...@lists.osuosl.org; linux-kernel@vger.kernel.org;
> linux-kbuild kbu...@vger.kernel.org>; Masahiro Yamada
> Subject: Re: [PATCH]
On Fri, 2019-09-27 at 11:46 -0300, Leonardo Bras wrote:
> I am not sure if it would be ok to use irq_{save,restore} in real mode,
> I will do some more reading of the docs before addressing this.
It looks like it's unsafe to merge irq_{save,restore} in
{start,end}_lockless_pgtbl_walk(), due to a
> -Original Message-
> From: Randy Dunlap [mailto:rdun...@infradead.org]
> Sent: Friday, September 27, 2019 4:12 PM
> To: Keller, Jacob E
> Cc: intel-wired-...@lists.osuosl.org; linux-kernel@vger.kernel.org;
> linux-kbuild kbu...@vger.kernel.org>; Masahiro Yamada
> Subject: Re: [PATCH]
From: Andi Kleen
Sometimes ~/.debug can get corrupted and contain files that still
have symbol tables, but which objdump cannot handle. Add a fallback
to read the "original" file in such a case. This might be wrong
too if it's different, but in many cases when profiling
on the same host it will w
From: Andi Kleen
The Intel fixed counters use a special table to override the JSON
information. During this override the period information from
the JSON file got dropped, which results in inst_retired.any
and similar running with frequency mode instead of a period.
Just specify the expected peri
From: Andi Kleen
When the LBR data and the instructions in a binary do not match the
loop printing instructions could get confused and print a long
stream of bogus instructions.
The problem was that if the instruction decoder cannot decode an
instruction it ilen wasn't initialized, so the loop
On Fri, Sep 27, 2019 at 2:45 PM Sean Christopherson
wrote:
>
> Write the desired L2 CR3 into vmcs02.GUEST_CR3 during nested VM-Enter
> instead of deferring the VMWRITE until vmx_set_cr3(). If the VMWRITE
> is deferred, then KVM can consume a stale vmcs02.GUEST_CR3 when it
> refreshes vmcs12->gues
It's necessary to monitor lockless pagetable walks, in order to avoid doing
THP splitting/collapsing during them.
Some methods rely on local_irq_{save,restore}, but that can be slow on
cases with a lot of cpus are used for the process.
In order to speedup some cases, I propose a refcount-based ap
If a process (qemu) with a lot of CPUs (128) try to munmap() a large
chunk of memory (496GB) mapped with THP, it takes an average of 275
seconds, which can cause a lot of problems to the load (in qemu case,
the guest will lock for this time).
Trying to find the source of this bug, I found out most
Applies the counting-based method for monitoring all book3s_64-related
functions that do lockless pagetable walks.
Adds comments explaining that some lockless pagetable walks don't need
protection due to guest pgd not being a target of THP collapse/split, or
due to being called from Realmode + MSR
There is a need to monitor lockless pagetable walks, in order to avoid
doing THP splitting/collapsing during them.
Some methods rely on local_irq_{save,restore}, but that can be slow on
cases with a lot of cpus are used for the process.
In order to speedup these cases, I propose a refcount-based
As decribed, gup_pgd_range is a lockless pagetable walk. So, in order to
monitor against THP split/collapse with the couting method, it's necessary
to bound it with {start,end}_lockless_pgtbl_walk.
There are dummy functions, so it is not going to add any overhead on archs
that don't use this metho
Enables count-based monitoring method for lockless pagetable walks on
PowerPC book3s_64.
Other architectures/platforms fallback to using generic dummy functions.
Signed-off-by: Leonardo Bras
---
arch/powerpc/include/asm/book3s/64/pgtable.h | 5 +
1 file changed, 5 insertions(+)
diff --git
Applies the counting-based method for monitoring lockless pgtable walks on
read_user_stack_slow.
Signed-off-by: Leonardo Bras
---
arch/powerpc/perf/callchain.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/perf/callchain.c b/arch/powerpc/perf/callchain.c
in
Applies the counting-based method for monitoring lockless pgtable walks on
addr_to_pfn().
Signed-off-by: Leonardo Bras
---
arch/powerpc/kernel/mce_power.c | 13 ++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/mce_power.c b/arch/powerpc/kernel/mce_
Applies the counting-based method for monitoring lockless pgtable walks on
kvmppc_e500_shadow_map().
Fixes the place where local_irq_restore() is called: previously, if ptep
was NULL, local_irq_restore() would never be called.
Signed-off-by: Leonardo Bras
---
arch/powerpc/kvm/e500_mmu_host.c |
Applies the counting-based method for monitoring all book3s_hv related
functions that do lockless pagetable walks.
Adds comments explaining that some lockless pagetable walks don't need
protection due to guest pgd not being a target of THP collapse/split, or
due to being called from Realmode + MSR
Applies the counting-based method for monitoring all hash-related functions
that do lockless pagetable walks.
hash_page_mm: Adds comment that explain that there is no need to
local_int_disable/save given that it is only called from DataAccess
interrupt, so interrupts are already disabled.
Signed-
Skips slow part of serialize_against_pte_lookup if there is no running
lockless pagetable walk.
Signed-off-by: Leonardo Bras
---
arch/powerpc/mm/book3s64/pgtable.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/book3s64/pgtable.c
b/arch/powerpc/mm/book3s64
On Fri, Sep 27, 2019 at 03:44:02PM -0700, Linus Torvalds wrote:
> But then the actual code is just one single small commit:
>
> > Dave Wysochanski (1):
> > SUNRPC: Track writers of the 'channel' file to improve
> > cache_listeners_exist
And that's also all that was in the diffstat in my pu
On Thu, 2019-09-19 at 09:33 +0200, Vincent Guittot wrote:
> Clean up asym packing to follow the default load balance behavior:
> - classify the group by creating a group_asym_packing field.
> - calculate the imbalance in calculate_imbalance() instead of
> bypassing it.
>
> We don't need to test tw
On Thu, 2019-09-19 at 09:33 +0200, Vincent Guittot wrote:
> Rename sum_nr_running to sum_h_nr_running because it effectively
> tracks
> cfs->h_nr_running so we can use sum_nr_running to track rq-
> >nr_running
> when needed.
>
> There is no functional changes.
>
> Signed-off-by: Vincent Guittot
On Thu, 2019-09-19 at 09:33 +0200, Vincent Guittot wrote:
> clean up load_balance and remove meaningless calculation and fields
> before
> adding new algorithm.
>
> Signed-off-by: Vincent Guittot
Yay.
Acked-by: Rik van Riel
--
All Rights Reversed.
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In function rtw_cfg80211_init_wiphy(), local variable "rf_type" could
be uninitialized if function rtw_hal_get_hwreg() fails to initialize
it. However, this value is used in function rtw_cfg80211_init_ht_capab()
and used to decide the value writing to ht_cap, which is potentially
unsafe.
Signed-of
Hi Evan,
On Tue, Sep 24, 2019 at 02:52:38PM -0700, Evan Green wrote:
> Across suspend and resume, we are seeing error messages like the following:
>
> atmel_mxt_ts i2c-PRP0001:00: __mxt_read_reg: i2c transfer failed (-121)
> atmel_mxt_ts i2c-PRP0001:00: Failed to read T44 and T5 (-121)
>
> This
2019년 9월 27일 (금) 오전 5:01, 慕冬亮 님이 작성:
>
> Dear all,
>
> Is there any summary of crash/panic behaviors in the Linux Kernel? For
> example, GPF (general protection fault), Kernel BUG (BUG_ON).
There are a number of blogs and material which describe the behavior
the kernel panic.
Talking about Androi
In function mx25_gcq_irq(), local variable "stats" could
be uninitialized if function regmap_read() returns -EINVAL.
However, this value is used in if statement, which is
potentially unsafe. The same case applied to the variable
"data" in function mx25_gcq_get_raw_value() in the same file.
Signed-
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