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| author | Sebastian Andrzej Siewior <[email protected]> | 2025-05-12 09:27:29 +0000 |
|---|---|---|
| committer | Paolo Abeni <[email protected]> | 2025-05-15 13:23:31 +0000 |
| commit | 672318331b44753ab7bd8545558939c38b4c1132 (patch) | |
| tree | a48ce8d89a96680738e8adc03fcc21eb660f48ba /net/unix/af_unix.c | |
| parent | openvswitch: Merge three per-CPU structures into one (diff) | |
| download | kernel-672318331b44753ab7bd8545558939c38b4c1132.tar.gz kernel-672318331b44753ab7bd8545558939c38b4c1132.zip | |
openvswitch: Use nested-BH locking for ovs_pcpu_storage
ovs_pcpu_storage is a per-CPU variable and relies on disabled BH for its
locking. Without per-CPU locking in local_bh_disable() on PREEMPT_RT
this data structure requires explicit locking.
The data structure can be referenced recursive and there is a recursion
counter to avoid too many recursions.
Add a local_lock_t to the data structure and use
local_lock_nested_bh() for locking. Add an owner of the struct which is
the current task and acquire the lock only if the structure is not owned
by the current task.
Cc: Aaron Conole <[email protected]>
Cc: Eelco Chaudron <[email protected]>
Cc: Ilya Maximets <[email protected]>
Cc: [email protected]
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Reviewed-by: Aaron Conole <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions