> From: Avadhut Naik
> [...]
> diff --git a/include/trace/stages/stage3_trace_output.h
> b/include/trace/stages/stage3_trace_output.h
> index c1fb1355d309..8e3215093e1f 100644
> --- a/include/trace/stages/stage3_trace_output.h
> +++ b/include/trace/stages/stage3_trace_output.h
> @@ -119,6 +119,14
This patch makes the dot parser used by dot2c and dot2k slightly more
robust, namely:
* allows parsing files with the gv extension (GraphViz)
* correctly parses edges with any indentation
* used to work only with a single character (e.g. '\t')
Additionally it fixes a couple of warnings reported
> From: Avadhut Naik
> [...]
> --- a/arch/x86/kernel/cpu/mce/core.c
> +++ b/arch/x86/kernel/cpu/mce/core.c
> [...]
> @@ -1506,13 +1528,14 @@ noinstr void do_machine_check(struct pt_regs
> *regs)
>
> this_cpu_inc(mce_exception_count);
>
> - mce_gather_info(&m, regs);
> - m.tsc = rdt
On Sun, Oct 13, 2024 at 12:56 AM Shakeel Butt wrote:
>
> On Thu, Oct 10, 2024 at 01:56:42PM GMT, Andrii Nakryiko wrote:
> > To increase mm->mm_lock_seq robustness, switch it from int to long, so
> > that it's a 64-bit counter on 64-bit systems and we can stop worrying
> > about it wrapping around
On Wed, Oct 16, 2024 at 01:40:55PM +0300, Mike Rapoport wrote:
> On Tue, Oct 15, 2024 at 01:11:54PM -0700, Luis Chamberlain wrote:
> > On Tue, Oct 15, 2024 at 08:54:29AM +0300, Mike Rapoport wrote:
> > > On Mon, Oct 14, 2024 at 09:09:49PM -0700, Luis Chamberlain wrote:
> > > > Mike, please run this
On Wed, 16 Oct 2024 09:53:25 -0400
Steven Rostedt wrote:
> On Wed, 16 Oct 2024 09:57:55 +0900
> "Masami Hiramatsu (Google)" wrote:
>
> > From: Masami Hiramatsu (Google)
> >
> > Pass ftrace_regs to the fgraph_ops::entryfunc(). If ftrace_regs is not
> > available, it passes a NULL instead. User
On Wed, 16 Oct 2024 15:24:22 +0300
Mike Rapoport wrote:
> diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
> index 8da0e66ca22d..b498897b213c 100644
> --- a/arch/x86/kernel/ftrace.c
> +++ b/arch/x86/kernel/ftrace.c
> @@ -118,10 +118,13 @@ ftrace_modify_code_direct(unsigned long ip
On Tue, Oct 15, 2024 at 5:53 PM Masami Hiramatsu wrote:
>
> Hi Andrii,
>
> Sorry I excavated this from patchwork.
>
> On Mon, 29 Apr 2024 15:38:08 -0700
> Andrii Nakryiko wrote:
>
> > On Wed, Apr 24, 2024 at 5:02 PM Andrii Nakryiko wrote:
> > >
> > > At the lowest level, rethook-based kretprobes
Hello,
I wanted to provide a bit of a context about and tie together a few
separate work streams (across a few separate kernel trees) all
revolving around uprobe improvements, as there are a bunch of them and
I'm sure it's hard to keep track of all of them. And hopefully I can
also get Peter and A
Masami Hiramatsu (Google) writes:
> On Wed, 16 Oct 2024 14:07:31 +0200
> Sven Schnelle wrote:
>> "Masami Hiramatsu (Google)" writes:
>> I think that still has the issue that the size is encoded in the
>> leftmost fields of the pointer, which doesn't work on all
>> architectures. I reported this
Steven Rostedt writes:
> On Wed, 16 Oct 2024 14:07:31 +0200
> Sven Schnelle wrote:
>
>> > +/* Return reserved data size in words */
>> > +static inline int decode_fprobe_header(unsigned long val, struct fprobe
>> > **fp)
>> > +{
>> > + unsigned long ptr;
>> > +
>> > + ptr = (val & FPROBE_HEAD
On Wed, Oct 16, 2024 at 03:24:18PM +0300, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)"
>
> vmalloc allocations with VM_ALLOW_HUGE_VMAP that do not explicitly
> specify node ID will use huge pages only if size_per_node is larger than
> a huge page.
> Still the actual allocated memory i
On Wed, 16 Oct 2024 14:07:31 +0200
Sven Schnelle wrote:
> "Masami Hiramatsu (Google)" writes:
>
> > From: Masami Hiramatsu (Google)
> >
> > Rewrite fprobe implementation on function-graph tracer.
> > Major API changes are:
> > - 'nr_maxactive' field is deprecated.
> > - This depends on CON
On Wed, Oct 16, 2024 at 03:24:17PM +0300, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)"
>
> There are a couple of declarations that depend on CONFIG_MMU in
> include/linux/vmalloc.h spread all over the file.
>
> Group them all together to improve code readability.
>
> No functional c
On Wed, 16 Oct 2024 14:07:31 +0200
Sven Schnelle wrote:
> > +/* Return reserved data size in words */
> > +static inline int decode_fprobe_header(unsigned long val, struct fprobe
> > **fp)
> > +{
> > + unsigned long ptr;
> > +
> > + ptr = (val & FPROBE_HEADER_PTR_MASK) | ~FPROBE_HEADER_PTR_M
This patch makes the dot parser used by dot2c and dot2k slightly more
robust, namely:
* allows parsing files with the gv extension (GraphViz)
* correctly parses edges with any indentation
* used to work only with a single character (e.g. '\t')
Additionally it fixes a couple of warnings reported
On Wed, 16 Oct 2024 09:57:55 +0900
"Masami Hiramatsu (Google)" wrote:
> From: Masami Hiramatsu (Google)
>
> Pass ftrace_regs to the fgraph_ops::entryfunc(). If ftrace_regs is not
> available, it passes a NULL instead. User callback function can access
> some registers (including return address)
From: "Mike Rapoport (Microsoft)"
Enable execmem's cache of PMD_SIZE'ed pages mapped as ROX for module
text allocations on 64 bit.
Signed-off-by: Mike Rapoport (Microsoft)
---
arch/x86/Kconfig | 1 +
arch/x86/mm/init.c | 37 -
2 files changed, 37 insertio
From: "Mike Rapoport (Microsoft)"
Using large pages to map text areas reduces iTLB pressure and improves
performance.
Extend execmem_alloc() with an ability to use huge pages with ROX
permissions as a cache for smaller allocations.
To populate the cache, a writable large page is allocated from
From: "Mike Rapoport (Microsoft)"
When module text memory will be allocated with ROX permissions, the
memory at the actual address where the module will live will contain
invalid instructions and there will be a writable copy that contains the
actual module code.
Update relocations and alternati
From: "Mike Rapoport (Microsoft)"
Add an API that will allow updates of the direct/linear map for a set of
physically contiguous pages.
It will be used in the following patches.
Signed-off-by: Mike Rapoport (Microsoft)
Reviewed-by: Christoph Hellwig
---
arch/arm64/include/asm/set_memory.h
From: "Mike Rapoport (Microsoft)"
In order to support ROX allocations for module text, it is necessary to
handle modifications to the code, such as relocations and alternatives
patching, without write access to that memory.
One option is to use text patching, but this would make module loading
e
From: "Mike Rapoport (Microsoft)"
Several architectures support text patching, but they name the header
files that declare patching functions differently.
Make all such headers consistently named text-patching.h and add an empty
header in asm-generic for architectures that do not support text pa
From: "Mike Rapoport (Microsoft)"
vmalloc allocations with VM_ALLOW_HUGE_VMAP that do not explicitly
specify node ID will use huge pages only if size_per_node is larger than
a huge page.
Still the actual allocated memory is not distributed between nodes and
there is no advantage in such approach.
From: "Mike Rapoport (Microsoft)"
There are a couple of declarations that depend on CONFIG_MMU in
include/linux/vmalloc.h spread all over the file.
Group them all together to improve code readability.
No functional changes.
Signed-off-by: Mike Rapoport (Microsoft)
Reviewed-by: Christoph Hellw
From: "Mike Rapoport (Microsoft)"
Hi,
This is an updated version of execmem ROX caches.
Andrew, Luis, there is a conflict with Suren's "page allocation tag
compression" patches:
https://lore.kernel.org/all/20241014203646.1952505-1-sur...@google.com
Probably taking this via mmotm would be more
"Masami Hiramatsu (Google)" writes:
> From: Masami Hiramatsu (Google)
>
> Rewrite fprobe implementation on function-graph tracer.
> Major API changes are:
> - 'nr_maxactive' field is deprecated.
> - This depends on CONFIG_DYNAMIC_FTRACE_WITH_ARGS or
> !CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARG
From: Masami Hiramatsu (Google)
Add a testcase for poll() on hist file. This introduces a helper binary
to the ftracetest, because there is no good way to reliably execute
poll() on hist file.
Signed-off-by: Masami Hiramatsu (Google)
Reviewed-by: Shuah Khan
---
tools/testing/selftests/ftrace/
From: Masami Hiramatsu (Google)
Since POLLIN will not be flashed until read the hist file, user needs
to repeat read() and poll() on hist for monitoring the event
continuously. But the read() is somewhat redundant only for monitoring
events.
This add POLLPRI poll event on hist, this event return
From: Masami Hiramatsu (Google)
Add poll syscall support on the `hist` file. The Waiter will be waken
up when the histogram is updated with POLLIN.
Currently, there is no way to wait for a specific event in userspace.
So user needs to peek the `trace` periodicaly, or wait on `trace_pipe`.
But th
Hi,
Here is the v6 patch to support polling on event 'hist' file.
The previous version is here;
https://lore.kernel.org/all/172398710447.295714.4489282566285719918.stgit@devnote2
This version is rebased on the ftrace/for-next branch of the
linux-trace tree, and use global irq_work and wq instead
On Tue, Oct 15, 2024 at 01:11:54PM -0700, Luis Chamberlain wrote:
> On Tue, Oct 15, 2024 at 08:54:29AM +0300, Mike Rapoport wrote:
> > On Mon, Oct 14, 2024 at 09:09:49PM -0700, Luis Chamberlain wrote:
> > > Mike, please run this with kmemleak enabled and running, and also try to
> > > get
> > > to
On 10/9/24 16:20, Sebastian Andrzej Siewior wrote:
The scheduler added NEED_RESCHED_LAZY scheduling. Record this state as
part of trace flags and expose it in the need_resched field.
Record and expose NEED_RESCHED_LAZY.
Signed-off-by: Sebastian Andrzej Siewior
---
include/linux/trace_even
On Wed, Oct 16, 2024 at 08:47:20AM +0900, Masami Hiramatsu wrote:
> On Tue, 15 Oct 2024 20:39:06 +0200
> Heiko Carstens wrote:
>
> > That would make things much simpler... e.g. your new patch is also
> > writing r3 to fregs, why?
>
> BTW, according to the document [1], r3 is for "return value 1
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