Merge remote-tracking branch 'torvalds/master' into perf-tools

To pick up changes in other trees that may affect perf, such as libbpf
and in general the header files that perf has copies of, so that

Merge remote-tracking branch 'torvalds/master' into perf-tools

To pick up changes in other trees that may affect perf, such as libbpf
and in general the header files that perf has copies of, so that we can
do the sync with the kernel sources.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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Merge tag 'kvmarm-fixes-6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.12, take #1

- Fix pKVM error path on init, making sure we do not chang

Merge tag 'kvmarm-fixes-6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.12, take #1

- Fix pKVM error path on init, making sure we do not change critical
system registers as we're about to fail

- Make sure that the host's vector length is at capped by a value
common to all CPUs

- Fix kvm_has_feat*() handling of "negative" features, as the current
code is pretty broken

- Promote Joey to the status of official reviewer, while James steps
down -- hopefully only temporarly

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Merge tag 'asoc-fix-v6.12-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v6.12

A bunch of fixes here that came in during the merge window and t

Merge tag 'asoc-fix-v6.12-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v6.12

A bunch of fixes here that came in during the merge window and the first
week of release, plus some new quirks and device IDs. There's nothing
major here, it's a bit bigger than it might've been due to there being
no fixes sent during the merge window due to your vacation.

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Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes

Required for a panthor fix that broke when
FOP_UNSIGNED_OFFSET was added in place of FMODE_UNSIGNED_OFFSET.

Signed-off-by: Maarten L

Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes

Required for a panthor fix that broke when
FOP_UNSIGNED_OFFSET was added in place of FMODE_UNSIGNED_OFFSET.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

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Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Cross-merge networking fixes after downstream PR.

No conflicts and no adjacent changes.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Merge tag 'for-6.12/io_uring-20240922' of git://git.kernel.dk/linux

Pull more io_uring updates from Jens Axboe:
"Mostly just a set of fixes in here, or little changes that didn't get
included in

Merge tag 'for-6.12/io_uring-20240922' of git://git.kernel.dk/linux

Pull more io_uring updates from Jens Axboe:
"Mostly just a set of fixes in here, or little changes that didn't get
included in the initial pull request. This contains:

- Move the SQPOLL napi polling outside the submission lock (Olivier)

- Rename of the "copy buffers" API that got added in the 6.12 merge
window. There's really no copying going on, it's just referencing
the buffers. After a bit of consideration, decided that it was
better to simply rename this to avoid potential confusion (me)

- Shrink struct io_mapped_ubuf from 48 to 32 bytes, by changing it to
start + len tracking rather than having start / end in there, and
by removing the caching of folio_mask when we can just calculate it
from folio_shift when we need it (me)

- Fixes for the SQPOLL affinity checking (me, Felix)

- Fix for how cqring waiting checks for the presence of task_work.
Just check it directly rather than check for a specific
notification mechanism (me)

- Tweak to how request linking is represented in tracing (me)

- Fix a syzbot report that deliberately sets up a huge list of
overflow entries, and then hits rcu stalls when flushing this list.
Just check for the need to preempt, and drop/reacquire locks in the
loop. There's no state maintained over the loop itself, and each
entry is yanked from head-of-list (me)"

* tag 'for-6.12/io_uring-20240922' of git://git.kernel.dk/linux:
io_uring: check if we need to reschedule during overflow flush
io_uring: improve request linking trace
io_uring: check for presence of task_work rather than TIF_NOTIFY_SIGNAL
io_uring/sqpoll: do the napi busy poll outside the submission block
io_uring: clean up a type in io_uring_register_get_file()
io_uring/sqpoll: do not put cpumask on stack
io_uring/sqpoll: retain test for whether the CPU is valid
io_uring/rsrc: change ubuf->ubuf_end to length tracking
io_uring/rsrc: get rid of io_mapped_ubuf->folio_mask
io_uring: rename "copy buffers" to "clone buffers"

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Merge branch 'next' into for-linus

Prepare input updates for 6.12 merge window.

io_uring/rsrc: change ubuf->ubuf_end to length tracking

If we change it to tracking ubuf->start + ubuf->len, then we can reduce
the size of struct io_mapped_ubuf by another 4 bytes, effectively 8
by

io_uring/rsrc: change ubuf->ubuf_end to length tracking

If we change it to tracking ubuf->start + ubuf->len, then we can reduce
the size of struct io_mapped_ubuf by another 4 bytes, effectively 8
bytes, as a hole is eliminated too.

This shrinks io_mapped_ubuf to 32 bytes.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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io_uring/rsrc: get rid of io_mapped_ubuf->folio_mask

We don't really need to cache this, let's reclaim 8 bytes from struct
io_mapped_ubuf and just calculate it when we need it. The only hot path
her

io_uring/rsrc: get rid of io_mapped_ubuf->folio_mask

We don't really need to cache this, let's reclaim 8 bytes from struct
io_mapped_ubuf and just calculate it when we need it. The only hot path
here is io_import_fixed().

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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io_uring: rename "copy buffers" to "clone buffers"

A recent commit added support for copying registered buffers from one
ring to another. But that term is a bit confusing, as no copying of
buffer da

io_uring: rename "copy buffers" to "clone buffers"

A recent commit added support for copying registered buffers from one
ring to another. But that term is a bit confusing, as no copying of
buffer data is done here. What is being done is simply cloning the
buffer registrations from one ring to another.

Rename it while we still can, so that it's more descriptive. No
functional changes in this patch.

Fixes: 7cc2a6eadcd7 ("io_uring: add IORING_REGISTER_COPY_BUFFERS method")
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Merge tag 'v6.10' into next

Sync up with mainline to bring in device_for_each_child_node_scoped()
and other newer APIs.

Merge tag 'for-6.12/io_uring-20240913' of git://git.kernel.dk/linux

Pull io_uring updates from Jens Axboe:

- NAPI fixes and cleanups (Pavel, Olivier)

- Add support for absolute timeouts (Pavel)

Merge tag 'for-6.12/io_uring-20240913' of git://git.kernel.dk/linux

Pull io_uring updates from Jens Axboe:

- NAPI fixes and cleanups (Pavel, Olivier)

- Add support for absolute timeouts (Pavel)

- Fixes for io-wq/sqpoll affinities (Felix)

- Efficiency improvements for dealing with huge pages (Chenliang)

- Support for a minwait mode, where the application essentially has two
timouts - one smaller one that defines the batch timeout, and the
overall large one similar to what we had before. This enables
efficient use of batching based on count + timeout, while still
working well with periods of less intensive workloads

- Use ITER_UBUF for single segment sends

- Add support for incremental buffer consumption. Right now each
operation will always consume a full buffer. With incremental
consumption, a recv/read operation only consumes the part of the
buffer that it needs to satisfy the operation

- Add support for GCOV for io_uring, to help retain a high coverage of
test to code ratio

- Fix regression with ocfs2, where an odd -EOPNOTSUPP wasn't correctly
converted to a blocking retry

- Add support for cloning registered buffers from one ring to another

- Misc cleanups (Anuj, me)

* tag 'for-6.12/io_uring-20240913' of git://git.kernel.dk/linux: (35 commits)
io_uring: add IORING_REGISTER_COPY_BUFFERS method
io_uring/register: provide helper to get io_ring_ctx from 'fd'
io_uring/rsrc: add reference count to struct io_mapped_ubuf
io_uring/rsrc: clear 'slot' entry upfront
io_uring/io-wq: inherit cpuset of cgroup in io worker
io_uring/io-wq: do not allow pinning outside of cpuset
io_uring/rw: drop -EOPNOTSUPP check in __io_complete_rw_common()
io_uring/rw: treat -EOPNOTSUPP for IOCB_NOWAIT like -EAGAIN
io_uring/sqpoll: do not allow pinning outside of cpuset
io_uring/eventfd: move refs to refcount_t
io_uring: remove unused rsrc_put_fn
io_uring: add new line after variable declaration
io_uring: add GCOV_PROFILE_URING Kconfig option
io_uring/kbuf: add support for incremental buffer consumption
io_uring/kbuf: pass in 'len' argument for buffer commit
Revert "io_uring: Require zeroed sqe->len on provided-buffers send"
io_uring/kbuf: move io_ring_head_to_buf() to kbuf.h
io_uring/kbuf: add io_kbuf_commit() helper
io_uring/kbuf: shrink nr_iovs/mode in struct buf_sel_arg
io_uring: wire up min batch wake timeout
...

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io_uring: add IORING_REGISTER_COPY_BUFFERS method

Buffers can get registered with io_uring, which allows to skip the
repeated pin_pages, unpin/unref pages for each O_DIRECT operation. This
reduces t

io_uring: add IORING_REGISTER_COPY_BUFFERS method

Buffers can get registered with io_uring, which allows to skip the
repeated pin_pages, unpin/unref pages for each O_DIRECT operation. This
reduces the overhead of O_DIRECT IO.

However, registrering buffers can take some time. Normally this isn't an
issue as it's done at initialization time (and hence less critical), but
for cases where rings can be created and destroyed as part of an IO
thread pool, registering the same buffers for multiple rings become a
more time sensitive proposition. As an example, let's say an application
has an IO memory pool of 500G. Initial registration takes:

Got 500 huge pages (each 1024MB)
Registered 500 pages in 409 msec

or about 0.4 seconds. If we go higher to 900 1GB huge pages being
registered:

Registered 900 pages in 738 msec

which is, as expected, a fully linear scaling.

Rather than have each ring pin/map/register the same buffer pool,
provide an io_uring_register(2) opcode to simply duplicate the buffers
that are registered with another ring. Adding the same 900GB of
registered buffers to the target ring can then be accomplished in:

Copied 900 pages in 17 usec

While timing differs a bit, this provides around a 25,000-40,000x
speedup for this use case.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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io_uring/rsrc: add reference count to struct io_mapped_ubuf

Currently there's a single ring owner of a mapped buffer, and hence the
reference count will always be 1 when it's torn down and freed. Ho

io_uring/rsrc: add reference count to struct io_mapped_ubuf

Currently there's a single ring owner of a mapped buffer, and hence the
reference count will always be 1 when it's torn down and freed. However,
in preparation for being able to link io_mapped_ubuf to different spots,
add a reference count to manage the lifetime of it.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Merge branch 'for-6.12/io_uring' into for-6.12/io_uring-discard

* for-6.12/io_uring: (31 commits)
io_uring/io-wq: inherit cpuset of cgroup in io worker
io_uring/io-wq: do not allow pinning outsi

Merge branch 'for-6.12/io_uring' into for-6.12/io_uring-discard

* for-6.12/io_uring: (31 commits)
io_uring/io-wq: inherit cpuset of cgroup in io worker
io_uring/io-wq: do not allow pinning outside of cpuset
io_uring/rw: drop -EOPNOTSUPP check in __io_complete_rw_common()
io_uring/rw: treat -EOPNOTSUPP for IOCB_NOWAIT like -EAGAIN
io_uring/sqpoll: do not allow pinning outside of cpuset
io_uring/eventfd: move refs to refcount_t
io_uring: remove unused rsrc_put_fn
io_uring: add new line after variable declaration
io_uring: add GCOV_PROFILE_URING Kconfig option
io_uring/kbuf: add support for incremental buffer consumption
io_uring/kbuf: pass in 'len' argument for buffer commit
Revert "io_uring: Require zeroed sqe->len on provided-buffers send"
io_uring/kbuf: move io_ring_head_to_buf() to kbuf.h
io_uring/kbuf: add io_kbuf_commit() helper
io_uring/kbuf: shrink nr_iovs/mode in struct buf_sel_arg
io_uring: wire up min batch wake timeout
io_uring: add support for batch wait timeout
io_uring: implement our own schedule timeout handling
io_uring: move schedule wait logic into helper
io_uring: encapsulate extraneous wait flags into a separate struct
...

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io_uring: remove unused rsrc_put_fn

rsrc_put_fn is declared but never used, remove it.

Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
Link: https://lore.kernel.org/r/20240902062134.136387-3-anuj2

io_uring: remove unused rsrc_put_fn

rsrc_put_fn is declared but never used, remove it.

Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
Link: https://lore.kernel.org/r/20240902062134.136387-3-anuj20.g@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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io_uring/rsrc: enable multi-hugepage buffer coalescing

Add support for checking and coalescing multi-hugepage-backed fixed
buffers. The coalescing optimizes both time and space consumption caused
by

io_uring/rsrc: enable multi-hugepage buffer coalescing

Add support for checking and coalescing multi-hugepage-backed fixed
buffers. The coalescing optimizes both time and space consumption caused
by mapping and storing multi-hugepage fixed buffers.

A coalescable multi-hugepage buffer should fully cover its folios
(except potentially the first and last one), and these folios should
have the same size. These requirements are for easier processing later,
also we need same size'd chunks in io_import_fixed for fast iov_iter
adjust.

Signed-off-by: Chenliang Li <cliang01.li@samsung.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/20240731090133.4106-3-cliang01.li@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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io_uring/rsrc: store folio shift and mask into imu

Store the folio shift and folio mask into imu struct and use it in
iov_iter adjust, as we will have non PAGE_SIZE'd chunks if a
multi-hugepage buff

io_uring/rsrc: store folio shift and mask into imu

Store the folio shift and folio mask into imu struct and use it in
iov_iter adjust, as we will have non PAGE_SIZE'd chunks if a
multi-hugepage buffer get coalesced.

Signed-off-by: Chenliang Li <cliang01.li@samsung.com>
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/20240731090133.4106-2-cliang01.li@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Merge branch 'next' into for-linus

Prepare input updates for 6.11 merge window.

Merge tag 'v6.9' into next

Sync up with the mainline to bring in the new cleanup API.

Merge drm-misc-next-2024-07-04 into drm-misc-next-fixes

Let's start the drm-misc-next-fixes cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>

Merge drm/drm-next into drm-intel-next

Sync to v6.10-rc3.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge drm/drm-next into drm-xe-next

Needed to get tracing cleanup and add mmio tracing series.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge remote-tracking branch 'drm-misc/drm-misc-next' into HEAD

Merge drm-misc-next tree into the msm-next tree in order to be able to
use HDMI connector framework for the MSM HDMI driver.

Merge drm/drm-next into drm-misc-next

Let's start the new release cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>