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| author | Kumar Kartikeya Dwivedi <[email protected]> | 2025-03-16 04:05:29 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <[email protected]> | 2025-03-19 15:03:05 +0000 |
| commit | c9102a68c070134ade5c941d7315481a77bcea53 (patch) | |
| tree | 264d6bf0f79d4a80e07e48fe686ed28d52c1d8f6 /lib/netdev-notifier-error-inject.c | |
| parent | rqspinlock: Add deadlock detection and recovery (diff) | |
| download | kernel-c9102a68c070134ade5c941d7315481a77bcea53.tar.gz kernel-c9102a68c070134ade5c941d7315481a77bcea53.zip | |
rqspinlock: Add a test-and-set fallback
Include a test-and-set fallback when queued spinlock support is not
available. Introduce a rqspinlock type to act as a fallback when
qspinlock support is absent.
Include ifdef guards to ensure the slow path in this file is only
compiled when CONFIG_QUEUED_SPINLOCKS=y. Subsequent patches will add
further logic to ensure fallback to the test-and-set implementation
when queued spinlock support is unavailable on an architecture.
Unlike other waiting loops in rqspinlock code, the one for test-and-set
has no theoretical upper bound under contention, therefore we need a
longer timeout than usual. Bump it up to a second in this case.
Signed-off-by: Kumar Kartikeya Dwivedi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>
Diffstat (limited to 'lib/netdev-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions