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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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4d29194118
To keep the kfree_rcu() code working in purely atomic sections on RT, such as non-threaded IRQ handlers and raw spinlock sections, avoid calling into the page allocator which uses sleeping locks on RT. In fact, even if the caller is preemptible, the kfree_rcu() code is not, as the krcp->lock is a raw spinlock. Calling into the page allocator is optional and avoiding it should be Ok, especially with the page pre-allocation support in future patches. Such pre-allocation would further avoid the a need for a dynamically allocated page in the first place. Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Uladzislau Rezki <urezki@gmail.com> Co-developed-by: Uladzislau Rezki <urezki@gmail.com> Signed-off-by: Uladzislau Rezki <urezki@gmail.com> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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| .. | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| rcu_segcblist.c | ||
| rcu_segcblist.h | ||
| rcu.h | ||
| rcuperf.c | ||
| rcutorture.c | ||
| srcutiny.c | ||
| srcutree.c | ||
| sync.c | ||
| tasks.h | ||
| tiny.c | ||
| tree_exp.h | ||
| tree_plugin.h | ||
| tree_stall.h | ||
| tree.c | ||
| tree.h | ||
| update.c | ||