gt;> On Thu, Dec 21, 2023 at 10:02:46AM +0100, Christophe Leroy wrote:
>>>>>> Declaring rodata_enabled and mark_rodata_ro() at all time
>>>>>> helps removing related #ifdefery in C files.
>>>>>>
>>>>>> Signed-off-by: Christophe Leroy
>
On 1/29/24 22:32, David Hildenbrand wrote:
> +static inline pte_t get_and_clear_full_ptes(struct mm_struct *mm,
> + unsigned long addr, pte_t *ptep, unsigned int nr, int full)
> +{
> + pte_t pte, tmp_pte;
> +
> + pte = ptep_get_and_clear_full(mm, addr, ptep, full);
> +
On 1/24/24 10:27 PM, Wang, Qingshun wrote:
> When Advisory Non-Fatal errors are raised, both correctable and
Maybe you can start with same info about what Advisory Non-FataL
errors are and the specification reference. I know that you included
it in cover letter. But it is good to include it in
On 1/29/24 22:32, David Hildenbrand wrote:
> This series is based on [1] and must be applied on top of it.
> Similar to what we did with fork(), let's implement PTE batching
> during unmap/zap when processing PTE-mapped THPs.
>
> We collect consecutive PTEs that map consecutive pages of the same
On Tue, 23 Jan 2024 09:35:05 +0100, Krzysztof Kozlowski wrote:
> Regular expression used to match the unit address part should not allow
> non-hex numbers.
>
> Signed-off-by: Krzysztof Kozlowski
> ---
> .../devicetree/bindings/soc/fsl/fsl,layerscape-dcfg.yaml| 2 +-
>
Declaring rodata_enabled and mark_rodata_ro() at all time
> >>>> helps removing related #ifdefery in C files.
> >>>>
> >>>> Signed-off-by: Christophe Leroy
> >>> Very nice cleanup, thanks!, applied and pushed
> >>>
> >>>
>
>>>> Signed-off-by: Christophe Leroy
>>> Very nice cleanup, thanks!, applied and pushed
>>>
>>> Luis
>> On next-20240130, which has your modules-next branch, and thus this
>> series and the other "module: Use set_memory_rox()" seri
在 2024/1/30 18:20, Mark Rutland 写道:
On Mon, Jan 29, 2024 at 09:46:52PM +0800, Tong Tiangen wrote:
The copy_mc_to_kernel() helper is memory copy implementation that handles
source exceptions. It can be used in memory copy scenarios that tolerate
hardware memory errors(e.g:
在 2024/1/30 18:31, Mark Rutland 写道:
On Mon, Jan 29, 2024 at 09:46:51PM +0800, Tong Tiangen wrote:
Currently, many scenarios that can tolerate memory errors when copying page
have been supported in the kernel[1][2][3], all of which are implemented by
copy_mc_[user]_highpage(). arm64 should
在 2024/1/30 20:01, Mark Rutland 写道:
On Tue, Jan 30, 2024 at 07:14:35PM +0800, Tong Tiangen wrote:
在 2024/1/30 1:43, Mark Rutland 写道:
On Mon, Jan 29, 2024 at 09:46:49PM +0800, Tong Tiangen wrote:
Further, this change will also silently fixup unexpected kernel faults if we
pass bad kernel
在 2024/1/30 21:07, Mark Rutland 写道:
On Tue, Jan 30, 2024 at 06:57:24PM +0800, Tong Tiangen wrote:
在 2024/1/30 1:51, Mark Rutland 写道:
On Mon, Jan 29, 2024 at 09:46:48PM +0800, Tong Tiangen wrote:
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 55f6455a8284..312932dc100b
On Tue, Jan 30, 2024 at 06:57:24PM +0800, Tong Tiangen wrote:
> 在 2024/1/30 1:51, Mark Rutland 写道:
> > On Mon, Jan 29, 2024 at 09:46:48PM +0800, Tong Tiangen wrote:
> > > diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
> > > index 55f6455a8284..312932dc100b 100644
> > > ---
On Tue, Jan 30, 2024 at 07:14:35PM +0800, Tong Tiangen wrote:
> 在 2024/1/30 1:43, Mark Rutland 写道:
> > On Mon, Jan 29, 2024 at 09:46:49PM +0800, Tong Tiangen wrote:
> > Further, this change will also silently fixup unexpected kernel faults if we
> > pass bad kernel pointers to copy_{to,from}_user,
在 2024/1/30 1:43, Mark Rutland 写道:
On Mon, Jan 29, 2024 at 09:46:49PM +0800, Tong Tiangen wrote:
If user process access memory fails due to hardware memory error, only the
relevant processes are affected, so it is more reasonable to kill the user
process and isolate the corrupt page than to
n wrote:
>> On Thu, Dec 21, 2023 at 10:02:46AM +0100, Christophe Leroy wrote:
>>> Declaring rodata_enabled and mark_rodata_ro() at all time
>>> helps removing related #ifdefery in C files.
>>>
>>> Signed-off-by: Christophe Leroy
>>
>> Very nice
在 2024/1/30 1:51, Mark Rutland 写道:
On Mon, Jan 29, 2024 at 09:46:48PM +0800, Tong Tiangen wrote:
For the arm64 kernel, when it processes hardware memory errors for
synchronize notifications(do_sea()), if the errors is consumed within the
kernel, the current processing is panic. However, it
Add a readable attribute in debugfs to trigger a
W^X pages check at any time.
To trigger the test, just read /sys/kernel/debug/check_wx_pages
It will report FAILED if the test failed, SUCCESS otherwise.
Detailed result is provided into dmesg.
Signed-off-by: Christophe Leroy
---
v2: Make it a
Have ptdump_check_wx() return true when the check is successful
or false otherwise.
Signed-off-by: Christophe Leroy
---
v2: New
---
arch/arm64/mm/ptdump.c | 11 ---
arch/powerpc/mm/ptdump/ptdump.c | 13 +
arch/riscv/mm/ptdump.c | 11 ---
Following patch will use ptdump_check_wx() regardless of
CONFIG_DEBUG_WX, so define it at all times on powerpc and s390
just like other architectures. Though keep the WARN_ON_ONCE()
only when CONFIG_DEBUG_WX is set.
Signed-off-by: Christophe Leroy
---
arch/powerpc/mm/ptdump/ptdump.c | 7 +++
All architectures using the core ptdump functionality also implement
CONFIG_DEBUG_WX, and they all do it more or less the same way, with a
function called debug_checkwx() that is called by mark_rodata_ro(),
which is a substitute to ptdump_check_wx() when CONFIG_DEBUG_WX is
set and a no-op
CONFIG_DEBUG_WX is a core option defined in mm/Kconfig.debug
To avoid any future conflict, rename ARM version
into CONFIG_ARM_DEBUG_WX.
Signed-off-by: Christophe Leroy
---
v2: Fixed left-over debug_checkwx() in mark_rodata_ro() and updated defconfigs
---
arch/arm/Kconfig.debug |
Refer old discussion at
https://lore.kernel.org/lkml/20200422152656.GF676@willie-the-truck/T/#m802eaf33efd6f8d575939d157301b35ac0d4a64f
And https://github.com/KSPP/linux/issues/35
This series refactors CONFIG_DEBUG_WX for the 5 architectures
implementing CONFIG_GENERIC_PTDUMP
First rename stuff
On Mon, Jan 29, 2024 at 09:46:51PM +0800, Tong Tiangen wrote:
> Currently, many scenarios that can tolerate memory errors when copying page
> have been supported in the kernel[1][2][3], all of which are implemented by
> copy_mc_[user]_highpage(). arm64 should also support this mechanism.
>
> Due
On Mon, Jan 29, 2024 at 09:46:52PM +0800, Tong Tiangen wrote:
> The copy_mc_to_kernel() helper is memory copy implementation that handles
> source exceptions. It can be used in memory copy scenarios that tolerate
> hardware memory errors(e.g: pmem_read/dax_copy_to_iter).
>
> Currnently, only x86
On Tue, Nov 21, 2023 at 10:51:34AM +1000, Nicholas Piggin wrote:
On Tue Nov 21, 2023 at 9:23 AM AEST, Masahiro Yamada wrote:
crtsavres.o is linked to modules. However, as explained in commit
d0e628cd817f ("kbuild: doc: clarify the difference between extra-y
and always-y"), 'make modules' does
On 29/01/2024 14:32, David Hildenbrand wrote:
> Similar to how we optimized fork(), let's implement PTE batching when
> consecutive (present) PTEs map consecutive pages of the same large
> folio.
>
> Most infrastructure we need for batching (mmu gather, rmap) is already
> there. We only have to
On 29/01/2024 14:32, David Hildenbrand wrote:
> Let's add a helper that lets us batch-process multiple consecutive PTEs.
>
> Note that the loop will get optimized out on all architectures except on
> powerpc. We have to add an early define of __tlb_remove_tlb_entry() on
> ppc to make the compiler
On 30.01.24 10:21, Ryan Roberts wrote:
On 29/01/2024 14:32, David Hildenbrand wrote:
Add __tlb_remove_folio_pages(), which will remove multiple consecutive
pages that belong to the same large folio, instead of only a single
page. We'll be using this function when optimizing unmapping/zapping of
On 29/01/2024 14:32, David Hildenbrand wrote:
> Add __tlb_remove_folio_pages(), which will remove multiple consecutive
> pages that belong to the same large folio, instead of only a single
> page. We'll be using this function when optimizing unmapping/zapping of
> large folios that are mapped by
ed-off-by: Christophe Leroy
>
> Very nice cleanup, thanks!, applied and pushed
>
> Luis
On next-20240130, which has your modules-next branch, and thus this
series and the other "module: Use set_memory_rox()" series applied,
my kernel crashes in some very weird way. Reverting yo
Re-reading the docs myself:
+#ifndef get_and_clear_full_ptes
+/**
+ * get_and_clear_full_ptes - Clear PTEs that map consecutive pages of the same
+ * folio, collecting dirty/accessed bits.
+ * @mm: Address space the pages are mapped into.
+ * @addr: Address the first
On 29/01/2024 14:32, David Hildenbrand wrote:
> Nowadays, encoded pages are only used in mmu_gather handling. Let's
> update the documentation, and define ENCODED_PAGE_BIT_DELAY_RMAP. While at
> it, rename ENCODE_PAGE_BITS to ENCODED_PAGE_BITS.
>
> If encoded page pointers would ever be used in
On 30.01.24 09:46, Ryan Roberts wrote:
On 30/01/2024 08:41, David Hildenbrand wrote:
On 30.01.24 09:13, Ryan Roberts wrote:
On 29/01/2024 14:32, David Hildenbrand wrote:
Let's prepare for further changes by factoring out processing of present
PTEs.
Signed-off-by: David Hildenbrand
---
On 29/01/2024 14:32, David Hildenbrand wrote:
> Let's prepare for further changes by factoring it out into a separate
> function.
>
> Signed-off-by: David Hildenbrand
Reviewed-by: Ryan Roberts
> ---
> mm/memory.c | 53 -
> 1 file changed,
On 30.01.24 09:45, Ryan Roberts wrote:
On 30/01/2024 08:37, David Hildenbrand wrote:
On 30.01.24 09:31, Ryan Roberts wrote:
On 29/01/2024 14:32, David Hildenbrand wrote:
We don't need up-to-date accessed-dirty information for anon folios and can
simply work with the ptent we already have.
On 30/01/2024 08:41, David Hildenbrand wrote:
> On 30.01.24 09:13, Ryan Roberts wrote:
>> On 29/01/2024 14:32, David Hildenbrand wrote:
>>> Let's prepare for further changes by factoring out processing of present
>>> PTEs.
>>>
>>> Signed-off-by: David Hildenbrand
>>> ---
>>> mm/memory.c | 92
On 30/01/2024 08:37, David Hildenbrand wrote:
> On 30.01.24 09:31, Ryan Roberts wrote:
>> On 29/01/2024 14:32, David Hildenbrand wrote:
>>> We don't need up-to-date accessed-dirty information for anon folios and can
>>> simply work with the ptent we already have. Also, we know the RSS counter
>>>
On 29/01/2024 14:32, David Hildenbrand wrote:
> We have two bits available in the encoded page pointer to store
> additional information. Currently, we use one bit to request delay of the
> rmap removal until after a TLB flush.
>
> We want to make use of the remaining bit internally for batching
On 30.01.24 09:13, Ryan Roberts wrote:
On 29/01/2024 14:32, David Hildenbrand wrote:
Let's prepare for further changes by factoring out processing of present
PTEs.
Signed-off-by: David Hildenbrand
---
mm/memory.c | 92 ++---
1 file changed,
Add framer support in the fsl_qmc_hdlc driver in order to be able to
signal carrier changes to the network stack based on the framer status
Also use this framer to provide information related to the E1/T1 line
interface on IF_GET_IFACE and configure the line interface according to
IF_IFACE_{E1,T1}
Hi,
This series introduces the QMC HDLC support.
Patches were previously sent as part of a full feature series and were
previously reviewed in that context:
"Add support for QMC HDLC, framer infrastructure and PEF2256 framer" [1]
In order to ease the merge, the full feature series has been
QMC channels support runtime timeslots changes but nothing is done at
the QMC HDLC driver to handle these changes.
Use existing IFACE ioctl in order to configure the timeslots to use.
Signed-off-by: Herve Codina
Reviewed-by: Christophe Leroy
Acked-by: Jakub Kicinski
---
After contributing the driver, add myself as the maintainer for the
Freescale QMC HDLC driver.
Signed-off-by: Herve Codina
---
MAINTAINERS | 7 +++
1 file changed, 7 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 8d1052fa6a69..15cd3a8e5866 100644
--- a/MAINTAINERS
+++
Currently the bitmap_onto() is available only for CONFIG_NUMA=y case,
while some users may benefit out of it and being independent to NUMA
code.
Make it available to users by moving out of ifdeffery and exporting for
modules.
Signed-off-by: Herve Codina
---
lib/bitmap.c | 3 ++-
1 file
The bitmap_onto() function translates one bitmap relative to another but
no function are present to perform the reverse translation.
Introduce bitmap_off() to fill this hole.
Signed-off-by: Herve Codina
---
include/linux/bitmap.h | 3 +++
lib/bitmap.c | 42
The QMC HDLC driver provides support for HDLC using the QMC (QUICC
Multichannel Controller) to transfer the HDLC data.
Signed-off-by: Herve Codina
Reviewed-by: Christophe Leroy
Acked-by: Jakub Kicinski
---
drivers/net/wan/Kconfig| 12 +
drivers/net/wan/Makefile | 1 +
On 30.01.24 09:31, Ryan Roberts wrote:
On 29/01/2024 14:32, David Hildenbrand wrote:
We don't need up-to-date accessed-dirty information for anon folios and can
simply work with the ptent we already have. Also, we know the RSS counter
we want to update.
We can safely move
On 29/01/2024 14:32, David Hildenbrand wrote:
> We don't need up-to-date accessed-dirty information for anon folios and can
> simply work with the ptent we already have. Also, we know the RSS counter
> we want to update.
>
> We can safely move arch_check_zapped_pte() + tlb_remove_tlb_entry() +
>
On 29/01/2024 14:32, David Hildenbrand wrote:
> We don't need uptodate accessed/dirty bits, so in theory we could
> replace ptep_get_and_clear_full() by an optimized ptep_clear_full()
> function. Let's rely on the provided pte.
>
> Further, there is no scenario where we would have to insert
On 29/01/2024 14:32, David Hildenbrand wrote:
> Let's prepare for further changes by factoring out processing of present
> PTEs.
>
> Signed-off-by: David Hildenbrand
> ---
> mm/memory.c | 92 ++---
> 1 file changed, 52 insertions(+), 40
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