>
> I'll send a fixup for this patch or another version of the series if more
> changes are needed.
Hi Haitao,
I don't like to say but in general I think you are sending too frequently. The
last version was sent April, 11th (my time), so considering the weekend it has
only been 3 or at most
Missed adding the config file:
index ..e7f1db1d3eff
--- /dev/null
+++ b/tools/testing/selftests/sgx/config
@@ -0,0 +1,4 @@
+CONFIG_CGROUPS=y
+CONFIG_CGROUP_MISC=y
+CONFIG_MEMCG=y
+CONFIG_X86_SGX=y
I'll send a fixup for this patch or another version of the series if more
changes
On Mon, 15 Apr 2024 18:40:23 +0900
"Masami Hiramatsu (Google)" wrote:
> Check the number of probe target symbols in the target module when
> the module is loaded. If the probe is not on the unique name symbols
> in the module, it will be rejected at that point.
>
> Note that the symbol which
The string SND_SOC_DAPM_DIR_OUT is printed in the snd_soc_dapm_path trace
event instead of its value:
(((REC->path_dir) == SND_SOC_DAPM_DIR_OUT) ? "->" : "<-")
User space cannot parse this, as it has no idea what SND_SOC_DAPM_DIR_OUT
is. Use TRACE_DEFINE_ENUM() to convert it to its value:
On Tue, 16 Apr 2024 04:08:46 +0200
Luca Ceresoli wrote:
> Thanks for the insight. I'm definitely trying to fix this based on your
> hint as soon as I get my hand on a board.
I have a patch I forgot to send out. Let me do that now.
-- Steve
On Fri, Apr 12, 2024 at 9:31 PM Cindy Lu wrote:
>
> Add a document explaining the reconnect process, including what the
> Userspace App needs to do and how it works with the kernel.
>
> Signed-off-by: Cindy Lu
> ---
> Documentation/userspace-api/vduse.rst | 41 +++
> 1
Hello,
syzbot found the following issue on:
HEAD commit:fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16fbaf7b18
kernel config: https://syzkaller.appspot.com/x/.config?x=fe78468a74fdc3b7
On 4/15/24 23:01, David Hildenbrand wrote:
On 15.04.24 10:41, zhenwei pi wrote:
Hi,
When the guest runs under critial memory pressure, the guest becomss
too slow, even sshd turns D state(uninterruptible) on memory
allocation. We can't login this VM to do any work on trouble shooting.
Guest
With different cgroups, the script starts one or multiple concurrent SGX
selftests (test_sgx), each to run the unclobbered_vdso_oversubscribed
test case, which loads an enclave of EPC size equal to the EPC capacity
available on the platform. The script checks results against the
expectation set
From: Sean Christopherson
Add initial documentation of how to regulate the distribution of
SGX Enclave Page Cache (EPC) memory via the Miscellaneous cgroup
controller.
Signed-off-by: Sean Christopherson
Co-developed-by: Kristen Carlson Accardi
Signed-off-by: Kristen Carlson Accardi
From: Kristen Carlson Accardi
Previous patches have implemented all infrastructure needed for
per-cgroup EPC page tracking and reclaiming. But all reclaimable EPC
pages are still tracked in the global LRU as sgx_lru_list() returns hard
coded reference to the global LRU.
Change sgx_lru_list() to
From: Kristen Carlson Accardi
For the global reclaimer to determine if any page available for
reclamation at the global level, it currently only checks for emptiness
of the global LRU. That will be inadequate when pages are tracked in
multiple LRUs, one per cgroup. For this purpose, create a new
From: Kristen Carlson Accardi
Currently in the EPC page allocation, the kernel simply fails the
allocation when the current EPC cgroup fails to charge due to its usage
reaching limit. This is not ideal. When that happens, a better way is
to reclaim EPC page(s) from the current EPC cgroup
Enclave Page Cache(EPC) memory can be swapped out to regular system
memory, and the consumed memory should be charged to a proper
mem_cgroup. Currently the selection of mem_cgroup to charge is done in
sgx_encl_get_mem_cgroup(). But it considers all contexts other than the
ksgxd thread are user
From: Kristen Carlson Accardi
In cases EPC pages need be allocated during a page fault and the cgroup
usage is near its limit, an asynchronous reclamation needs be triggered
to avoid blocking the page fault handling.
Create a workqueue, corresponding work item and function definitions
for EPC
From: Kristen Carlson Accardi
The functions, sgx_{mark,unmark}_page_reclaimable(), manage the tracking
of reclaimable EPC pages: sgx_mark_page_reclaimable() adds a newly
allocated page into the global LRU list while
sgx_unmark_page_reclaimable() does the opposite. Abstract the hard coded
global
From: Kristen Carlson Accardi
SGX Enclave Page Cache (EPC) memory allocations are separate from normal
RAM allocations, and are managed solely by the SGX subsystem. The
existing cgroup memory controller cannot be used to limit or account for
SGX EPC memory, which is a desirable feature in some
From: Sean Christopherson
Introduce a data structure to wrap the existing reclaimable list and its
spinlock. Each cgroup later will have one instance of this structure to
track EPC pages allocated for processes associated with the same cgroup.
Just like the global SGX reclaimer (ksgxd), an EPC
From: Kristen Carlson Accardi
Add SGX EPC memory, MISC_CG_RES_SGX_EPC, to be a valid resource type
for the misc controller.
Signed-off-by: Kristen Carlson Accardi
Co-developed-by: Haitao Huang
Signed-off-by: Haitao Huang
Reviewed-by: Jarkko Sakkinen
Reviewed-by: Kai Huang
Tested-by: Jarkko
From: Kristen Carlson Accardi
The misc cgroup controller (subsystem) currently does not perform
resource type specific action for Cgroups Subsystem State (CSS) events:
the 'css_alloc' event when a cgroup is created and the 'css_free' event
when a cgroup is destroyed.
Define callbacks for those
From: Kristen Carlson Accardi
The SGX EPC cgroup will reclaim EPC pages when usage in a cgroup reaches
its or ancestor's limit. This requires a walk from the current cgroup up
to the root similar to misc_cg_try_charge(). Export misc_cg_parent() to
enable this walk.
The SGX driver also needs
Replace boolean parameters for 'reclaim' in the function
sgx_alloc_epc_page() and its callers with an enum.
Also opportunistically remove non-static declaration of
__sgx_alloc_epc_page() and a typo
Signed-off-by: Haitao Huang
Suggested-by: Jarkko Sakkinen
Suggested-by: Dave Hansen
SGX Enclave Page Cache (EPC) memory allocations are separate from normal
RAM allocations, and are managed solely by the SGX subsystem. The existing
cgroup memory controller cannot be used to limit or account for SGX EPC
memory, which is a desirable feature in some environments, e.g., support
for
Hello Steven,
On Mon, 15 Apr 2024 04:44:30 -0400
Steven Rostedt wrote:
> On Mon, 18 Mar 2024 16:43:07 +0100
> Luca Ceresoli wrote:
>
> > However the arrows are still reversed.
>
> This requires a kernel change. The problem is that the print fmt has:
>
> print fmt: "%c%s %s %s %s %s",
From: Masami Hiramatsu (Google)
Fix the kerneldoc of _xbc_exit() which is updated to have an @early
argument and the function name is changed.
Reported-by: kernel test robot
Closes:
https://lore.kernel.org/oe-kbuild-all/202404150036.kpj3hefa-...@intel.com/
Signed-off-by: Masami Hiramatsu
Dne nedelja, 14. april 2024 ob 19:57:13 GMT +2 je Aren Moynihan napisal(a):
> Signed-off-by: Aren Moynihan
Commit message cannot be empty.
Best regards,
Jernej
> ---
> Documentation/devicetree/bindings/iio/light/stk33xx.yaml | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git
On Mon, 15 Apr 2024 14:08:44 -0500, Jarkko Sakkinen
wrote:
On Mon Apr 15, 2024 at 6:13 AM EEST, Haitao Huang wrote:
On Sun, 14 Apr 2024 10:01:03 -0500, Jarkko Sakkinen
wrote:
> On Wed Apr 10, 2024 at 9:25 PM EEST, Haitao Huang wrote:
>> To run selftests for EPC cgroup:
>>
>> sudo
On Mon Apr 15, 2024 at 8:32 PM EEST, Haitao Huang wrote:
> On Sat, 13 Apr 2024 16:34:17 -0500, Jarkko Sakkinen
> wrote:
>
> > On Wed Apr 10, 2024 at 9:25 PM EEST, Haitao Huang wrote:
> >> To run selftests for EPC cgroup:
> >>
> >> sudo ./run_epc_cg_selftests.sh
> >>
> >> To watch misc cgroup
On Mon Apr 15, 2024 at 4:22 PM EEST, Huang, Kai wrote:
> On Wed, 2024-04-10 at 11:25 -0700, Haitao Huang wrote:
> > Replace boolean parameters for 'reclaim' in the function
> > sgx_alloc_epc_page() and its callers with an enum.
> >
> > Also opportunistically remove non-static declaration of
> >
On Mon Apr 15, 2024 at 6:13 AM EEST, Haitao Huang wrote:
> On Sun, 14 Apr 2024 10:01:03 -0500, Jarkko Sakkinen
> wrote:
>
> > On Wed Apr 10, 2024 at 9:25 PM EEST, Haitao Huang wrote:
> >> To run selftests for EPC cgroup:
> >>
> >> sudo ./run_epc_cg_selftests.sh
> >>
> >> To watch misc cgroup
* Alexey Dobriyan (adobri...@gmail.com) wrote:
> On Sun, Apr 14, 2024 at 01:58:55PM -0700, Luis Chamberlain wrote:
> > On Sun, Apr 14, 2024 at 10:05:05PM +0300, Alexey Dobriyan wrote:
> > > --- a/include/linux/fs.h
> > > +++ b/include/linux/fs.h
> > > @@ -3616,4 +3616,12 @@ extern int
On 4/15/24 3:19 AM, Colin Ian King wrote:
> The variable rc is being assigned an value and then is being re-assigned
> a new value in the next statement. The assignment is redundant and can
> be removed.
>
> Cleans up clang scan build warning:
> drivers/dax/bus.c:1207:2: warning: Value stored
On Mon, Apr 15, 2024 at 09:52:41AM +0200, Peter Zijlstra wrote:
> On Thu, Apr 11, 2024 at 07:00:41PM +0300, Mike Rapoport wrote:
> > +/**
> > + * enum execmem_type - types of executable memory ranges
> > + *
> > + * There are several subsystems that allocate executable memory.
> > + *
On Sat, 13 Apr 2024 16:34:17 -0500, Jarkko Sakkinen
wrote:
On Wed Apr 10, 2024 at 9:25 PM EEST, Haitao Huang wrote:
To run selftests for EPC cgroup:
sudo ./run_epc_cg_selftests.sh
To watch misc cgroup 'current' changes during testing, run this in a
separate terminal:
On Sun, Apr 14, 2024 at 01:58:55PM -0700, Luis Chamberlain wrote:
> On Sun, Apr 14, 2024 at 10:05:05PM +0300, Alexey Dobriyan wrote:
> > --- a/include/linux/fs.h
> > +++ b/include/linux/fs.h
> > @@ -3616,4 +3616,12 @@ extern int vfs_fadvise(struct file *file, loff_t
> > offset, loff_t len,
> >
On 4/3/24 12:49, Pavel Machek wrote:
> Hi!
>
>> From: Luis Garcia
>>
>> Add powerdown-gpio binding as it is required for some boards
>
> "." at end of sentence.
>
>> Signed-off-by: Ondrej Jirman
>> Signed-off-by: Luis Garcia
>
> If the patch is from Ondrej, he should be in From:, I believe.
On Mon, Apr 15, 2024 at 12:43:16PM +0200, Peter Zijlstra wrote:
> On Thu, Apr 11, 2024 at 07:05:24PM +0300, Mike Rapoport wrote:
> > diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
> > index 45a280f2161c..b4d6868df573 100644
> > --- a/arch/x86/kernel/alternative.c
> >
On Sat, Apr 13, 2024, Marc Zyngier wrote:
> On Fri, 12 Apr 2024 15:54:22 +0100, Sean Christopherson
> wrote:
> >
> > On Fri, Apr 12, 2024, Marc Zyngier wrote:
> > > On Fri, 12 Apr 2024 11:44:09 +0100, Will Deacon wrote:
> > > > On Fri, Apr 05, 2024 at 07:58:12AM -0400, Paolo Bonzini wrote:
> >
On Mon, Apr 15, 2024 at 12:47:50PM +0200, Peter Zijlstra wrote:
> On Thu, Apr 11, 2024 at 07:05:25PM +0300, Mike Rapoport wrote:
>
> > To populate the cache, a writable large page is allocated from vmalloc with
> > VM_ALLOW_HUGE_VMAP, filled with invalid instructions and then remapped as
> > ROX.
On Mon, Apr 15, 2024 at 09:52:41AM +0200, Peter Zijlstra wrote:
> On Thu, Apr 11, 2024 at 07:00:41PM +0300, Mike Rapoport wrote:
> > +/**
> > + * enum execmem_type - types of executable memory ranges
> > + *
> > + * There are several subsystems that allocate executable memory.
> > + *
On 4/15/24 00:25, Alexander Stein wrote:
> Hi,
>
> Am Sonntag, 14. April 2024, 22:34:40 CEST schrieb g...@luigi311.com:
>> From: Dave Stevenson
>>
>> The output image is defined as being 4208x3118 pixels in size.
>> Y_ADD_STA register was set to 0, and Y_ADD_END to 3118, giving
>> 3119 lines
On 4/15/24 10:00, Tommaso Merciai wrote:
> Hi Luis,
>
> On Sun, Apr 14, 2024 at 02:35:01PM -0600, g...@luigi311.com wrote:
>> From: Luis Garcia
>>
>> It was documented in DT, but not implemented.
>
> Good catch :-)
>
>>
>> Signed-off-by: Ondrej Jirman
>> Signed-off-by: Luis Garcia
>> ---
>>
On Mon, Apr 15, 2024 at 11:19:28AM +0100, Colin Ian King wrote:
> The variable rc is being assigned an value and then is being re-assigned
> a new value in the next statement. The assignment is redundant and can
> be removed.
>
> Cleans up clang scan build warning:
> drivers/dax/bus.c:1207:2:
On 4/15/24 09:18, Tommaso Merciai wrote:
> Hi Luis,
>
> On Sun, Apr 14, 2024 at 02:35:02PM -0600, g...@luigi311.com wrote:
>> From: Luis Garcia
>>
>> Use the v4l2_link_freq_to_bitmap() helper to figure out which
>> driver-supported link freq can be used on a given system.
>>
>> Signed-off-by:
On 4/15/24 08:47, Tommaso Merciai wrote:
> Hi Luis,
>
> On Sun, Apr 14, 2024 at 02:35:03PM -0600, g...@luigi311.com wrote:
>> From: Luis Garcia
>>
>> Use the new comon CCI register access helpers to replace the private
>> register access helpers in the imx258 driver.
>>
>> Signed-off-by: Luis
On 15.04.24 10:41, zhenwei pi wrote:
Expose memory scan/reclaim information to the host side via virtio
balloon device.
Now we have a metric to analyze the memory performance:
y: counter increases
n: counter does not changes
h: the rate of counter change is high
l: the rate of counter change
On Sun, Apr 14, 2024 at 8:57 PM Aren Moynihan wrote:
>
> If the chip isn't powered, this call is likely to return an error.
> Without a log here the driver will silently fail to probe. Common errors
> are ENXIO (when the chip isn't powered) and ETIMEDOUT (when the i2c bus
> isn't powered).
>
On 15.04.24 10:41, zhenwei pi wrote:
Memory allocation stall counter represents the performance/latency of
memory allocation, expose this counter to the host side by virtio
balloon device via out-of-bound way.
Signed-off-by: zhenwei pi
---
drivers/virtio/virtio_balloon.c | 19
On 15.04.24 10:41, zhenwei pi wrote:
When the guest OS runs under critical memory pressure, the guest
starts to kill processes. A guest monitor agent may scan 'oom_kill'
from /proc/vmstat, and reports the OOM KILL event. However, the agent
may be killed and we will loss this critical event(and
On 15.04.24 10:41, zhenwei pi wrote:
Hi,
When the guest runs under critial memory pressure, the guest becomss
too slow, even sshd turns D state(uninterruptible) on memory
allocation. We can't login this VM to do any work on trouble shooting.
Guest kernel log via virtual TTY(on host side) only
6.8-stable review patch. If anyone has any objections, please let me know.
--
From: Zhenhua Huang
commit fbbdc255fbee59b4207a5398fdb4f04590681a79 upstream.
commit 717c7c894d4b ("fs/proc: Add boot loader arguments as comment to
/proc/bootconfig") adds bootloader argument
On Sun, Apr 14, 2024 at 07:52:03PM +0200, Sebastian Reichel wrote:
> Hi,
>
> On Sun, Mar 31, 2024 at 08:02:28AM +0100, Stafford Horne wrote:
> > After commit 14c5678720bd ("power: reset: syscon-poweroff: Use
> > devm_register_sys_off_handler(POWER_OFF)") setting up of pm_power_off
> > was removed
On Sun, Apr 14, 2024 at 8:57 PM Aren Moynihan wrote:
>
> From: Ondrej Jirman
>
> VDD power input can be used to completely power off the chip during
> system suspend. Do so if available.
...
> #include
> #include
> #include
> +#include
Move it to be ordered and add a blank line to
On Wed, 2024-04-10 at 11:25 -0700, Haitao Huang wrote:
> From: Sean Christopherson
>
> Introduce a data structure to wrap the existing reclaimable list and its
> spinlock. Each cgroup later will have one instance of this structure to
> track EPC pages allocated for processes associated with the
On Wed, 2024-04-10 at 11:25 -0700, Haitao Huang wrote:
> From: Kristen Carlson Accardi
>
> Add SGX EPC memory, MISC_CG_RES_SGX_EPC, to be a valid resource type
> for the misc controller.
>
> Signed-off-by: Kristen Carlson Accardi
> Co-developed-by: Haitao Huang
> Signed-off-by: Haitao Huang
On Wed, 2024-04-10 at 11:25 -0700, Haitao Huang wrote:
> From: Kristen Carlson Accardi
>
> The SGX EPC cgroup will reclaim EPC pages when usage in a cgroup reaches
> its or ancestor's limit. This requires a walk from the current cgroup up
> to the root similar to misc_cg_try_charge(). Export
On Wed, 2024-04-10 at 11:25 -0700, Haitao Huang wrote:
> From: Kristen Carlson Accardi
>
> The misc cgroup controller (subsystem) currently does not perform
> resource type specific action for Cgroups Subsystem State (CSS) events:
> the 'css_alloc' event when a cgroup is created and the
On Wed, 2024-04-10 at 11:25 -0700, Haitao Huang wrote:
> Replace boolean parameters for 'reclaim' in the function
> sgx_alloc_epc_page() and its callers with an enum.
>
> Also opportunistically remove non-static declaration of
> __sgx_alloc_epc_page() and a typo
>
> Signed-off-by: Haitao Huang
Currently most of the API for page_frag API is returning
'virtual address' as output or expecting 'virtual address'
as input, in order to differentiate the API handling between
'virtual address' and 'struct page', add '_va' suffix to the
corresponding API mirroring the page_pool_alloc_va() API of
From: Masami Hiramatsu (Google)
Skip recording calltime and rettime if the fgraph_ops does not need it.
This is a kind of performance optimization for fprobe. Since the fprobe
user does not use these entries, recording timestamp in fgraph is just
a overhead (e.g. eBPF, ftrace). So introduce the
From: Masami Hiramatsu (Google)
Update fprobe documentation for the new fprobe on function-graph
tracer. This includes some bahvior changes and pt_regs to
ftrace_regs interface change.
Signed-off-by: Masami Hiramatsu (Google)
---
Changes in v2:
- Update @fregs parameter explanation.
---
From: Masami Hiramatsu (Google)
This test case repeats define and undefine the fprobe dynamic event to
ensure that the fprobe does not cause any issue with such operations.
Signed-off-by: Masami Hiramatsu (Google)
---
.../test.d/dynevent/add_remove_fprobe_repeat.tc| 19
From: Masami Hiramatsu (Google)
Since the fprobe event does not support maxactive anymore, stop
testing the maxactive syntax error checking.
Signed-off-by: Masami Hiramatsu (Google)
---
.../ftrace/test.d/dynevent/fprobe_syntax_errors.tc |4 +---
1 file changed, 1 insertion(+), 3
From: Masami Hiramatsu (Google)
Remove depercated fprobe::nr_maxactive. This involves fprobe events to
rejects the maxactive number.
Signed-off-by: Masami Hiramatsu (Google)
---
Changes in v2:
- Newly added.
---
include/linux/fprobe.h |2 --
kernel/trace/trace_fprobe.c | 44
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_ARGS, and
CONFIG_HAVE_FUNCTION_GRAPH_FREGS. So
From: Masami Hiramatsu (Google)
Add CONFIG_HAVE_FTRACE_GRAPH_FUNC kconfig in addition to ftrace_graph_func
macro check. This is for the other feature (e.g. FPROBE) which requires to
access ftrace_regs from fgraph_ops::entryfunc() can avoid compiling if
the fgraph can not pass the valid
From: Masami Hiramatsu (Google)
Enable kprobe_multi feature if CONFIG_FPROBE is enabled. The pt_regs is
converted from ftrace_regs by ftrace_partial_regs(), thus some registers
may always returns 0. But it should be enough for function entry (access
arguments) and exit (access return value).
From: Masami Hiramatsu (Google)
Allow fprobe events to be enabled with CONFIG_DYNAMIC_FTRACE_WITH_ARGS.
With this change, fprobe events mostly use ftrace_regs instead of pt_regs.
Note that if the arch doesn't enable HAVE_PT_REGS_COMPAT_FTRACE_REGS,
fprobe events will not be able to be used from
From: Masami Hiramatsu (Google)
Add ftrace_fill_perf_regs() which should be compatible with the
perf_fetch_caller_regs(). In other words, the pt_regs returned from the
ftrace_fill_perf_regs() must satisfy 'user_mode(regs) == false' and can be
used for stack tracing.
Signed-off-by: Masami
From: Masami Hiramatsu (Google)
Add ftrace_partial_regs() which converts the ftrace_regs to pt_regs.
This is for the eBPF which needs this to keep the same pt_regs interface
to access registers.
Thus when replacing the pt_regs with ftrace_regs in fprobes (which is
used by kprobe_multi eBPF
From: Masami Hiramatsu (Google)
Change the fprobe exit handler to use ftrace_regs structure instead of
pt_regs. This also introduce HAVE_PT_REGS_TO_FTRACE_REGS_CAST which means
the ftrace_regs's memory layout is equal to the pt_regs so that those are
able to cast. Fprobe introduces a new
From: Masami Hiramatsu (Google)
This allows fprobes to be available with CONFIG_DYNAMIC_FTRACE_WITH_ARGS
instead of CONFIG_DYNAMIC_FTRACE_WITH_REGS, then we can enable fprobe
on arm64.
Signed-off-by: Masami Hiramatsu (Google)
Acked-by: Florent Revest
---
Changes in v6:
- Keep using
From: Masami Hiramatsu (Google)
Pass ftrace_regs to the fgraph_ops::retfunc(). If ftrace_regs is not
available, it passes a NULL instead. User callback function can access
some registers (including return address) via this ftrace_regs.
Signed-off-by: Masami Hiramatsu (Google)
---
Changes in
From: Masami Hiramatsu (Google)
Use ftrace_regs instead of fgraph_ret_regs for tracing return value
on function_graph tracer because of simplifying the callback interface.
The CONFIG_HAVE_FUNCTION_GRAPH_RETVAL is also replaced by
CONFIG_HAVE_FUNCTION_GRAPH_FREGS.
Signed-off-by: Masami
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) via this ftrace_regs.
Signed-off-by: Masami Hiramatsu (Google)
---
Changes in
From: Masami Hiramatsu (Google)
Add a selftest for multiple function graph tracer with storage on a same
function. In this case, the shadow stack entry will be shared among those
fgraph with different data storage. So this will ensure the fgraph will
not mixed those storage data.
Signed-off-by:
From: Steven Rostedt (VMware)
Add boot up selftest that passes variables from a function entry to a
function exit, and make sure that they do get passed around.
Signed-off-by: Steven Rostedt (VMware)
Signed-off-by: Masami Hiramatsu (Google)
---
Changes in v2:
- Add reserved size test.
-
From: Steven Rostedt (VMware)
Added functions that can be called by a fgraph_ops entryfunc and retfunc to
store state between the entry of the function being traced to the exit of
the same function. The fgraph_ops entryfunc() may call
fgraph_reserve_data() to store up to 32 words onto the task's
From: Steven Rostedt (VMware)
The use of the task->trace_recursion for the logic used for the function
graph no-trace was a bit of an abuse of that variable. Now that there
exists global vars that are per stack for registered graph traces, use
that instead.
Signed-off-by: Steven Rostedt
From: Steven Rostedt (VMware)
The use of the task->trace_recursion for the logic used for the function
graph depth was a bit of an abuse of that variable. Now that there
exists global vars that are per stack for registered graph traces, use that
instead.
Signed-off-by: Steven Rostedt (VMware)
From: Steven Rostedt (VMware)
The use of the task->trace_recursion for the logic used for the
set_graph_funnction was a bit of an abuse of that variable. Now that there
exists global vars that are per stack for registered graph traces, use that
instead.
Signed-off-by: Steven Rostedt (VMware)
From: Steven Rostedt (VMware)
Add a "task variables" array on the tasks shadow ret_stack that is the
size of longs for each possible registered fgraph_ops. That's a total
of 16, taking up 8 * 16 = 128 bytes (out of a page size 4k).
This will allow for fgraph_ops to do specific features on a per
From: Masami Hiramatsu (Google)
Since the fgraph_array index is used for the bitmap on the shadow
stack, it may leave some entries after a function_graph instance is
removed. Thus if another instance reuses the fgraph_array index soon
after releasing it, the fgraph may confuse to call the newer
From: Steven Rostedt (VMware)
Allow for instances to have their own ftrace_ops part of the fgraph_ops
that makes the funtion_graph tracer filter on the set_ftrace_filter file
of the instance and not the top instance.
Note that this also requires to update ftrace_graph_func() to call new
From: Steven Rostedt (VMware)
Some of the flags for ftrace_startup() may be exposed even when
CONFIG_DYNAMIC_FTRACE is not configured in. This is fine as the difference
between dynamic ftrace and static ftrace is done within the internals of
ftrace itself. No need to have use cases fail to
From: Steven Rostedt (VMware)
Now that function graph tracing can handle more than one user, allow it to
be enabled in the ftrace instances. Note, the filtering of the functions is
still joined by the top level set_ftrace_filter and friends, as well as the
graph and nograph files.
From: Steven Rostedt (VMware)
Pass the fgraph_ops structure to the function graph callbacks. This will
allow callbacks to add a descriptor to a fgraph_ops private field that wil
be added in the future and use it for the callbacks. This will be useful
when more than one callback can be registered
From: Steven Rostedt (VMware)
The function pointers ftrace_graph_entry and ftrace_graph_return are no
longer called via the function_graph tracer. Instead, an array structure is
now used that will allow for multiple users of the function_graph
infrastructure. The variables are still used by the
From: Steven Rostedt (VMware)
Allow for multiple users to attach to function graph tracer at the same
time. Only 16 simultaneous users can attach to the tracer. This is because
there's an array that stores the pointers to the attached fgraph_ops. When
a function being traced is entered, each of
From: Steven Rostedt (VMware)
Add an array structure that will eventually allow the function graph tracer
to have up to 16 simultaneous callbacks attached. It's an array of 16
fgraph_ops pointers, that is assigned when one is registered. On entry of a
function the entry of the first item in the
From: Steven Rostedt (VMware)
Instead of using "ALIGN()", use BUILD_BUG_ON() as the structures should
always be divisible by sizeof(long).
Link:
http://lkml.kernel.org/r/2019052444.gi2...@hirez.programming.kicks-ass.net
Suggested-by: Peter Zijlstra
Signed-off-by: Steven Rostedt (VMware)
From: Andrii Nakryiko
[ Upstream commit e9c856cabefb71d47b2eeb197f72c9c88e9b45b0 ]
There is no need to delay putting either path or task to deallocation
step. It can be done right after bpf_uprobe_unregister. Between release
and dealloc, there could be still some running BPF programs, but they
From: Steven Rostedt (VMware)
In order to make it possible to have multiple callbacks registered with the
function_graph tracer, the retstack needs to be converted from an array of
ftrace_ret_stack structures to an array of longs. This will allow to store
the list of callbacks on the stack for
From: Masami Hiramatsu (Google)
Add ftrace_regs definition for x86_64 in the ftrace header to
clarify what register will be accessible from ftrace_regs.
Signed-off-by: Masami Hiramatsu (Google)
---
Changes in v3:
- Add rip to be saved.
Changes in v2:
- Newly added.
---
From: Masami Hiramatsu (Google)
Rename ftrace_regs_return_value to ftrace_regs_get_return_value as same as
other ftrace_regs_get/set_* APIs.
Signed-off-by: Masami Hiramatsu (Google)
Acked-by: Mark Rutland
---
Changes in v6:
- Moved to top of the series.
Changes in v3:
- Newly added.
---
From: Masami Hiramatsu (Google)
To clarify what will be expected on ftrace_regs, add a comment to the
architecture independent definition of the ftrace_regs.
Signed-off-by: Masami Hiramatsu (Google)
Acked-by: Mark Rutland
---
Changes in v8:
- Update that the saved registers depends on the
From: Andrii Nakryiko
[ Upstream commit e9c856cabefb71d47b2eeb197f72c9c88e9b45b0 ]
There is no need to delay putting either path or task to deallocation
step. It can be done right after bpf_uprobe_unregister. Between release
and dealloc, there could be still some running BPF programs, but they
Hi,
Here is the 9th version of the series to re-implement the fprobe on
function-graph tracer. The previous version is;
https://lore.kernel.org/all/170887410337.564249.6360118840946697039.stgit@devnote2/
This version is ported on the latest kernel (v6.9-rc3 + probes/for-next)
and fixed some
On Mon, Apr 15, 2024 at 09:56:27AM +0200, Pavel Machek wrote:
> Hi!
>
> > I'm pleased to announce the 5.10.213-rt105 stable release.
> >
> > This release is an update to the new stable 5.10.213 version and no extra
> > changes have been performed.
>
> Thanks for release.
>
> I see
On Thu, Apr 11, 2024 at 07:05:25PM +0300, Mike Rapoport wrote:
> To populate the cache, a writable large page is allocated from vmalloc with
> VM_ALLOW_HUGE_VMAP, filled with invalid instructions and then remapped as
> ROX.
> +static void execmem_invalidate(void *ptr, size_t size, bool writable)
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