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| author | Dapeng Mi <dapeng1.mi@linux.intel.com> | 2026-09-17 09:52:33 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2026-09-22 11:37:46 +0200 |
| commit | 0102c8c7fdfc4bd700971daff2b94470f4eafae4 (patch) | |
| tree | 531306c2299f9a269f0a986e29f17ba972180104 /Documentation/networking/skbuff.rst | |
| download | linux-stable-0102c8c7fdfc4bd700971daff2b94470f4eafae4.tar.gz linux-stable-0102c8c7fdfc4bd700971daff2b94470f4eafae4.zip | |
perf/x86/intel: Rename DMR offcore_rsp attribute to offmodule_rspgrafted
DMR introduces Offmodule Response events in place of the legacy
Offcore Response events, but it still exposes the inherited
offcore_rsp PMU attribute for programming the corresponding MSR data.
Rename the DMR PMU attribute to offmodule_rsp so the sysfs interface
matches the underlying event name and avoids user & tooling confusion.
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://patch.msgid.link/20260917015234.981153-12-dapeng1.mi@linux.intel.com
Diffstat (limited to 'Documentation/networking/skbuff.rst')
| -rw-r--r-- | Documentation/networking/skbuff.rst | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/networking/skbuff.rst b/Documentation/networking/skbuff.rst new file mode 100644 index 000000000..94681523e --- /dev/null +++ b/Documentation/networking/skbuff.rst @@ -0,0 +1,31 @@ +.. SPDX-License-Identifier: GPL-2.0 + +struct sk_buff +============== + +:c:type:`sk_buff` is the main networking structure representing +a packet. + +Basic sk_buff geometry +---------------------- + +.. kernel-doc:: include/linux/skbuff.h + :doc: Basic sk_buff geometry + +Shared skbs and skb clones +-------------------------- + +:c:member:`sk_buff.users` is a simple refcount allowing multiple entities +to keep a struct sk_buff alive. skbs with a ``sk_buff.users != 1`` are referred +to as shared skbs (see skb_shared()). + +skb_clone() allows for fast duplication of skbs. None of the data buffers +get copied, but caller gets a new metadata struct (struct sk_buff). +&skb_shared_info.refcount indicates the number of skbs pointing at the same +packet data (i.e. clones). + +dataref and headerless skbs +--------------------------- + +.. kernel-doc:: include/linux/skbuff.h + :doc: dataref and headerless skbs |