"Ho-Ren (Jack) Chuang" writes:
> The current implementation treats emulated memory devices, such as
> CXL1.1 type3 memory, as normal DRAM when they are emulated as normal memory
> (E820_TYPE_RAM). However, these emulated devices have different
> characteristics than traditional DRAM, making it im
On 3/11/24 17:05, Michael S. Tsirkin wrote:
> On Thu, Feb 01, 2024 at 12:47:39PM +0100, Tobias Huschle wrote:
>> On Thu, Feb 01, 2024 at 03:08:07AM -0500, Michael S. Tsirkin wrote:
>>> On Thu, Feb 01, 2024 at 08:38:43AM +0100, Tobias Huschle wrote:
On Sun, Jan 21, 2024 at 01:44:32PM -0500, Mic
On 11/03/2024 22:22, Pavel Machek wrote:
> Hi!
>
>> Add binding for anx7688 usb type-c bridge. I don't have a datasheet,
>> but I did best I could.
>>
>> Signed-off-by: Pavel Machek
>
> Any more comments here? Automatic system told me I need to replace one
> character...
Well, I often do not re
From: "Steven Rostedt (Google)"
If a reader of the ring buffer is doing a poll, and waiting for the ring
buffer to hit a specific watermark, there could be a case where it gets
into an infinite ping-pong loop.
The poll code has:
rbwork->full_waiters_pending = true;
if (!cpu_buffer->shortest
After making a slight change to wakeups in ring_buffer_wait()
the system would hang. Spending several hours going on a wild goose
chase I found that the change only triggered the bug because it
changed the timings. The bug was there before the update but never
was triggered.
The poll code has:
From: "Steven Rostedt (Google)"
The check for knowing if the poll should wait or not is basically the
exact same logic as rb_watermark_hit(). The only difference is that
rb_watermark_hit() also handles the !full case. But for the full case, the
logic is the same. Just call that instead of duplica
From: "Steven Rostedt (Google)"
Convert ring_buffer_wait() over to wait_event_interruptible(). The default
condition is to execute the wait loop inside __wait_event() just once.
This does not change the ring_buffer_wait() prototype yet, but
restructures the code so that it can take a "cond" and
A patch was sent to "fix" the wait_index variable that is used to help with
waking of waiters on the ring buffer. The patch was rejected, but I started
looking at associated code. Discussing it on IRC with Mathieu Desnoyers
we discovered a design flaw.
The waiter reads "wait_index" then enters
From: "Steven Rostedt (Google)"
When the trace_pipe_raw file is closed, there should be no new readers on
the file descriptor. This is mostly handled with the waking and wait_index
fields of the iterator. But there's still a slight race.
CPU 0 CPU 1
-
On 11/03/2024 17:27, Tanmay Shah wrote:
>>> +then:
>>> + patternProperties:
>>> +"^r5f@[0-9a-f]+$":
>>> + type: object
>>> +
>>> + properties:
>>> +reg:
>>> + minItems: 1
>>> + items:
>>> +- description: ATCM i
On 11/03/2024 19:39, Tanmay Shah wrote:
>>> +
>>> +else:
>>> + patternProperties:
>>> +"^r5f@[0-9a-f]+$":
>>> + type: object
>>> +
>>> + properties:
>>> +reg:
>>> + minItems: 1
>>> + items:
>>> +- description:
On 11/03/2024 18:59, Tanmay Shah wrote:
> From: Radhey Shyam Pandey
>
> Introduce bindings for TCM memory address space on AMD-xilinx Zynq
> UltraScale+ platform. It will help in defining TCM in device-tree
> and make it's access platform agnostic and data-driven.
>
> Tightly-coupled memories(TC
From: "Steven Rostedt (Google)"
Convert ring_buffer_wait() over to wait_event_interruptible(). The default
condition is to execute the wait loop inside __wait_event() just once.
This does not change the ring_buffer_wait() prototype yet, but
restructures the code so that it can take a "cond" and
From: "Steven Rostedt (Google)"
When the trace_pipe_raw file is closed, there should be no new readers on
the file descriptor. This is mostly handled with the waking and wait_index
fields of the iterator. But there's still a slight race.
CPU 0 CPU 1
-
[ Sorry for the spam, but I just noticed kernel-test-robot complained
about KernelDoc format, which this fixes ]
A patch was sent to "fix" the wait_index variable that is used to help with
waking of waiters on the ring buffer. The patch was rejected, but I started
looking at associated code. Di
From: "Steven Rostedt (Google)"
The check for knowing if the poll should wait or not is basically the
exact same logic as rb_watermark_hit(). The only difference is that
rb_watermark_hit() also handles the !full case. But for the full case, the
logic is the same. Just call that instead of duplica
After making a slight change to wakeups in ring_buffer_wait()
the system would hang. Spending several hours going on a wild goose
chase I found that the change only triggered the bug because it
changed the timings. The bug was there before the update but never
was triggered.
The poll code has:
From: "Steven Rostedt (Google)"
If a reader of the ring buffer is doing a poll, and waiting for the ring
buffer to hit a specific watermark, there could be a case where it gets
into an infinite ping-pong loop.
The poll code has:
rbwork->full_waiters_pending = true;
if (!cpu_buffer->shortest
Hi Bjorn
(apologies, my corporate mail server has butchered your name here).
There's a big info dump below; I realise this sounds like a sales pitch for
CALL_OPS, but my intent is more to say "here are some dragons you may not have
spotted".
On Thu, Mar 07, 2024 at 08:27:40PM +0100, Bj"orn T"ope
Hi Pavel,
I'm sorry to keep you waiting.
On Fri, Feb 23, 2024 at 10:28:49PM +0100, Pavel Machek wrote:
> From: Ondrej Jirman
>
> This is driver for ANX7688 USB-C HDMI, with flashing and debugging
> features removed. ANX7688 is rather criticial piece on PinePhone,
> there's no display and no bat
On 3/10/24 12:41, Luca Weiss wrote:
Add the dts for the Xperia Z3 smartphone which is based on Sony's
shinano platform, so at the moment there's little device-specific dts to
add on top of the common parts.
Signed-off-by: Luca Weiss
---
modulo missing makfile, this looks good
On Tue, 12 Mar 2024 09:19:20 -0400
Steven Rostedt wrote:
> From: "Steven Rostedt (Google)"
>
> If a reader of the ring buffer is doing a poll, and waiting for the ring
> buffer to hit a specific watermark, there could be a case where it gets
> into an infinite ping-pong loop.
>
> The poll code
From: "Steven Rostedt (Google)"
The WARN_ON() check in __assign_str() to catch where the source variable
to the macro doesn't match the source variable to __string() gives an
error in clang:
>> include/trace/events/sunrpc.h:703:4: warning: result of comparison against a
>> string literal is uns
On Wed, 13 Mar 2024 00:22:10 +0900
Masami Hiramatsu (Google) wrote:
> On Tue, 12 Mar 2024 09:19:20 -0400
> Steven Rostedt wrote:
>
> > From: "Steven Rostedt (Google)"
> >
> > If a reader of the ring buffer is doing a poll, and waiting for the ring
> > buffer to hit a specific watermark, there
On 3/12/24 7:10 AM, Krzysztof Kozlowski wrote:
> On 11/03/2024 19:39, Tanmay Shah wrote:
> >>> +
> >>> +else:
> >>> + patternProperties:
> >>> +"^r5f@[0-9a-f]+$":
> >>> + type: object
> >>> +
> >>> + properties:
> >>> +reg:
> >>> + minIt
On Tue, 12 Mar 2024 09:19:21 -0400
Steven Rostedt wrote:
> From: "Steven Rostedt (Google)"
>
> The check for knowing if the poll should wait or not is basically the
> exact same logic as rb_watermark_hit(). The only difference is that
> rb_watermark_hit() also handles the !full case. But for th
On Wed, 13 Mar 2024 00:38:42 +0900
Masami Hiramatsu (Google) wrote:
> On Tue, 12 Mar 2024 09:19:21 -0400
> Steven Rostedt wrote:
>
> > From: "Steven Rostedt (Google)"
> >
> > The check for knowing if the poll should wait or not is basically the
> > exact same logic as rb_watermark_hit(). The
On 3/12/24 7:10 AM, Krzysztof Kozlowski wrote:
> On 11/03/2024 17:27, Tanmay Shah wrote:
> >>> +then:
> >>> + patternProperties:
> >>> +"^r5f@[0-9a-f]+$":
> >>> + type: object
> >>> +
> >>> + properties:
> >>> +reg:
> >>> + minItems: 1
>
From: "Steven Rostedt (Google)"
The rb_watermark_hit() checks if the amount of data in the ring buffer is
above the percentage level passed in by the "full" variable. If it is, it
returns true.
But it also sets the "shortest_full" field of the cpu_buffer that informs
writers that it needs to cal
On Tue, 12 Mar 2024 11:56:41 -0400
Steven Rostedt wrote:
> From: "Steven Rostedt (Google)"
>
> The rb_watermark_hit() checks if the amount of data in the ring buffer is
> above the percentage level passed in by the "full" variable. If it is, it
> returns true.
>
> But it also sets the "shortes
On Mon, 11 Mar 2024 at 05:44, Abdellatif El Khlifi
wrote:
>
> Hi Mathieu,
>
> On Fri, Mar 08, 2024 at 09:44:26AM -0700, Mathieu Poirier wrote:
> > On Thu, 7 Mar 2024 at 12:40, Abdellatif El Khlifi
> > wrote:
> > >
> > > Hi Mathieu,
> > >
> > > > > + do {
> > > > > + state_reg = readl(
On Mon, 2024-03-11 at 19:24 +0100, Peter Hilber wrote:
> On 08.03.24 13:33, David Woodhouse wrote:
> > On Fri, 2024-03-08 at 11:32 +0100, Peter Hilber wrote:
> > > On 07.03.24 15:02, David Woodhouse wrote:
> > > > Hm, should we allow UTC? If you tell me the time in UTC, then
> > > > (sometimes) I s
Hi Mathieu,
On Tue, Mar 12, 2024 at 10:29:52AM -0600, Mathieu Poirier wrote:
> > This is an initial patchset for allowing to turn on and off the remote
> > processor.
> > The FW is already loaded before the Corstone-1000 SoC is powered on and this
> > is done through the FPGA board bootloader in
On 3/12/24 7:13 AM, Krzysztof Kozlowski wrote:
> On 11/03/2024 18:59, Tanmay Shah wrote:
>> From: Radhey Shyam Pandey
>>
>> Introduce bindings for TCM memory address space on AMD-xilinx Zynq
>> UltraScale+ platform. It will help in defining TCM in device-tree
>> and make it's access platform a
On 12/03/2024 18:42, Tanmay Shah wrote:
>
>
> On 3/12/24 7:13 AM, Krzysztof Kozlowski wrote:
>> On 11/03/2024 18:59, Tanmay Shah wrote:
>>> From: Radhey Shyam Pandey
>>>
>>> Introduce bindings for TCM memory address space on AMD-xilinx Zynq
>>> UltraScale+ platform. It will help in defining TCM
On 3/10/24 12:41, Luca Weiss wrote:
In preparation for adding the Sony Xperia Z3 smartphone, split the
common parts into shinano-common.dtsi.
No functional change intended.
Signed-off-by: Luca Weiss
---
I give you the green light to also add newlines between subsequent
subnodes (e.g. unde
Vishal Verma wrote:
> The dax driver incorrectly used driver-core device locks to protect
> internal dax region and dax device configuration structures. Replace the
> device lock usage with a local rwsem, one each for dax region
> configuration and dax device configuration. As a result of this
> co
On Tue, 2024-03-12 at 13:07 -0700, Dan Williams wrote:
> Vishal Verma wrote:
> > The dax driver incorrectly used driver-core device locks to protect
> > internal dax region and dax device configuration structures. Replace the
> > device lock usage with a local rwsem, one each for dax region
> > con
On Tue, 12 Mar 2024 20:20:17 + "Verma, Vishal L"
wrote:
> > All of these WARN_ON_ONCE() usages should be replaced with
> > lockdep_assert_held() and lockdep_assert_held_write() where appropriate.
>
> Makes sense - I can send a patch post -rc1 to change these if that's okay
> Andrew?
Pleas
This patch set implements two speed ups for uprobe/uretprobe runtime execution
path for some common scenarios: BPF-only uprobes (patches #1 and #2) and
system-wide (non-PID-specific) uprobes (patch #3). Please see individual
patches for details.
Given I haven't worked with uprobe code before, I'm
Move the logic of fetching temporary per-CPU uprobe buffer and storing
uprobes args into it to a new helper function. Store data size as part
of this buffer, simplifying interfaces a bit, as now we only pass single
uprobe_cpu_buffer reference around, instead of pointer + dsize.
This logic was dupl
uprobe_cpu_buffer and corresponding logic to store uprobe args into it
are used for uprobes/uretprobes that are created through tracefs or
perf events.
BPF is yet another user of uprobe/uretprobe infrastructure, but doesn't
need uprobe_cpu_buffer and associated data. For BPF-only use cases this
bu
It's very common with BPF-based uprobe/uretprobe use cases to have
a system-wide (not PID specific) probes used. In this case uprobe's
trace_uprobe_filter->nr_systemwide counter is bumped at registration
time, and actual filtering is short circuited at the time when
uprobe/uretprobe is triggered.
From: "Steven Rostedt (Google)"
While testing libtracefs on the mmapped ring buffer, the test that checks
if missed events are accounted for failed when using the mapped buffer.
This is because the mapped page does not update the missed events that
were dropped because the writer filled up the ri
On Tue, Feb 13, 2024 at 02:10:45PM +0300, Andrew Kanner wrote:
> On Thu, Feb 01, 2024 at 10:13:54AM -0800, Luis Chamberlain wrote:
> >
> > While you're at it, if you want to try it, you could see if you can
> > improve the situation more by looking at symbol_get() users that remain
> > and seeing
On Tue, Mar 12, 2024 at 03:25:27PM -0700, Luis Chamberlain wrote:
> On Tue, Feb 13, 2024 at 02:10:45PM +0300, Andrew Kanner wrote:
> > On Thu, Feb 01, 2024 at 10:13:54AM -0800, Luis Chamberlain wrote:
> > >
> > > While you're at it, if you want to try it, you could see if you can
> > > improve the
The following changes since commit 41bccc98fb7931d63d03f326a746ac4d429c1dd3:
Linux 6.8-rc2 (2024-01-28 17:01:12 -0800)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/
tags/modules-6.9-rc1
for you to fetch changes up to d1909c022173935
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