WebAs we already saw above, the CONFIG_RWSEM_SPIN_ON_OWNER kernel configuration option is enabled by default for x86_64 architecture, so let's take a look at the definition of … WebOct 16, 2024 · - * The rwsem_spin_on_owner () function returns the following 4 values + * The __rwsem_spin_on_owner () function returns the following 4 values * depending on the …
rwsem.c source code [linux/kernel/locking/rwsem.c]
Web*PATCH v8 00/19] locking/rwsem: Rwsem rearchitecture part 2 @ 2024-05-20 20:58 Waiman Long 2024-05-20 20:59 ` [PATCH v8 01/19] locking/rwsem: Make owner available even if !CONFIG_RWSEM_SPIN_ON_OWNER Waiman Long ` (18 more replies) 0 siblings, 19 replies; 83+ messages in thread From: Waiman Long @ 2024-05-20 20:58 UTC (permalink / raw Webnext prev parent reply other threads:[~2024-07-20 15:04 UTC newest] Thread overview: 83+ messages / expand[flat nested] mbox.gz Atom feed top 2024-05-20 20:58 [PATCH v8 00/19] locking/rwsem: Rwsem rearchitecture part 2 Waiman Long 2024-05-20 20:59 ` [PATCH v8 01/19] locking/rwsem: Make owner available even if !CONFIG_RWSEM_SPIN_ON_OWNER … kimi\u0027s chop and oyster house salt lake city
20.68% sched-messaging [kernel.vmlinux] [k] mutex_spin_on_owner
WebMessage ID: [email protected] (mailing list archive)State: New, archived: Headers: show WebMay 6, 2016 · 1) rwsem_can_spin_on_owner() will disallow optimistic spinning if the owner field is NULL which can mean either the readers own the lock or the owning writer hasn't … WebIf that waiter happens to be an RT task running on the same CPU as the first waiter, it can block the first waiter from acquiring the rwsem leading to live lock. Fix this problem by making sure that a non-first waiter cannot spin in the slowpath loop without sleeping. kimi\u0027s chop and oyster house slc