- 08 May, 2011 32 commits
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Lai Jiangshan authored
The rcu callback __nf_ct_ext_free_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(__nf_ct_ext_free_rcu). Signed-off-by:
Lai Jiangshan <laijs@cn.fujitsu.com> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by:
Josh Triplett <josh@joshtriplett.org>
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Lai Jiangshan authored
The rcu callback net_generic_release() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(net_generic_release). Signed-off-by:
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Lai Jiangshan authored
The rcu callback netlbl_unlhsh_free_addr6() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(netlbl_unlhsh_free_addr6). Signed-off-by:
Paul Moore <paul.moore@hp.com> Signed-off-by:
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Lai Jiangshan authored
The rcu callback netlbl_unlhsh_free_addr4() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(netlbl_unlhsh_free_addr4). Signed-off-by:
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Lai Jiangshan authored
The rcu callback sel_netif_free() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(sel_netif_free). Signed-off-by:
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Lai Jiangshan authored
The rcu callback xps_dev_maps_release() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(xps_dev_maps_release). Signed-off-by:
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Lai Jiangshan authored
The rcu callback xps_map_release() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(xps_map_release). Signed-off-by:
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Lai Jiangshan authored
The rcu callback rps_map_release() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(rps_map_release). Signed-off-by:
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Lai Jiangshan authored
The rcu callback ipv6_mc_socklist_reclaim() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(ipv6_mc_socklist_reclaim). Signed-off-by:
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Lai Jiangshan authored
The rcu callback macvlan_port_rcu_free() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(macvlan_port_rcu_free). Signed-off-by:
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Lai Jiangshan authored
The rcu callback ring_free_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(ring_free_rcu). Signed-off-by:
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Lai Jiangshan authored
The rcu callback free_dm_hw_stat() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(free_dm_hw_stat). Signed-off-by:
Neil Horman <nhorman@tuxdriver.com> Acked-by:
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Lai Jiangshan authored
The rcu callback ip_mc_socklist_reclaim() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(ip_mc_socklist_reclaim). Signed-off-by:
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Lai Jiangshan authored
The rcu callback ip_sf_socklist_reclaim() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(ip_sf_socklist_reclaim). Signed-off-by:
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Lai Jiangshan authored
The rcu callback ip_mc_list_reclaim() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(ip_mc_list_reclaim). Signed-off-by:
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Lai Jiangshan authored
The rcu callback __gen_kill_estimator() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(__gen_kill_estimator). Signed-off-by:
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Lai Jiangshan authored
The rcu callback __leaf_info_free_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(__leaf_info_free_rcu). Signed-off-by:
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Lai Jiangshan authored
The rcu callback fc_rport_free_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(fc_rport_free_rcu). Signed-off-by:
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Lai Jiangshan authored
The rcu callback user_update_rcu_disposal() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(user_update_rcu_disposal). Signed-off-by:
David Howells <dhowells@redhat.com> Reviewed-by:
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Lai Jiangshan authored
There is no callback of this module maybe queued since we use kfree_rcu(), we can safely remove the rcu_barrier(). Signed-off-by:
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Lai Jiangshan authored
The rcu callback dn_dev_free_ifa_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(dn_dev_free_ifa_rcu). Signed-off-by:
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Lai Jiangshan authored
The rcu callback ha_rcu_free() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(ha_rcu_free). Signed-off-by:
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Lai Jiangshan authored
The rcu callback sctp_local_addr_free() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(sctp_local_addr_free). Signed-off-by:
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Lai Jiangshan authored
The rcu callback listeners_free_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(listeners_free_rcu). Signed-off-by:
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Lai Jiangshan authored
The rcu callback inet6_ifa_finish_destroy_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(inet6_ifa_finish_destroy_rcu). Signed-off-by:
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Lai Jiangshan authored
The rcu callback in6_dev_finish_destroy_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(in6_dev_finish_destroy_rcu). Signed-off-by:
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Lai Jiangshan authored
[PATCH 05/17] net,rcu: convert call_rcu(tcf_police_free_rcu) to kfree_rcu() The rcu callback tcf_police_free_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(tcf_police_free_rcu). Signed-off-by:
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Lai Jiangshan authored
The rcu callback tcf_common_free_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(tcf_common_free_rcu). Signed-off-by:
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Lai Jiangshan authored
The rcu callback __free_css_id_cb() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(__free_css_id_cb). Signed-off-by:
Paul Menage <menage@google.com> Signed-off-by:
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Lai Jiangshan authored
The rcu callback free_cgroup_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(free_cgroup_rcu). Signed-off-by:
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Lai Jiangshan authored
The rcu callback free_css_set_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(free_css_set_rcu). Signed-off-by:
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Paul E. McKenney authored
Avoid calling into the scheduler while holding core RCU locks. This allows rcu_read_unlock() to be called while holding the runqueue locks, but only as long as there was no chance of the RCU read-side critical section having been preempted. (Otherwise, if RCU priority boosting is enabled, rcu_read_unlock() might call into the scheduler in order to unboost itself, which might allows self-deadlock on the runqueue locks within the scheduler.) Signed-off-by:
Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by:
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- 06 May, 2011 8 commits
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Gleb Natapov authored
Provide rcu_virt_note_context_switch() for vitalization use to note quiescent state during guest entry. Signed-off-by:
Gleb Natapov <gleb@redhat.com> Signed-off-by:
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Paul E. McKenney authored
Signed integer overflow is undefined by the C standard, so move calculations to unsigned. Signed-off-by: -
Eric Dumazet authored
rcu_sched_qs() currently calls local_irq_save()/local_irq_restore() up to three times. Remove irq masking from rcu_qsctr_help() / invoke_rcu_kthread() and do it once in rcu_sched_qs() / rcu_bh_qs() This generates smaller code as well. text data bss dec hex filename 2314 156 24 2494 9be kernel/rcutiny.old.o 2250 156 24 2430 97e kernel/rcutiny.new.o Fix an outdated comment for rcu_qsctr_help() Move invoke_rcu_kthread() definition before its use. Signed-off-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
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Paul E. McKenney authored
This commit marks a first step towards making call_rcu() have real-time behavior. If irqs are disabled, don't dive into the RCU core. Later on, this new early exit will wake up the per-CPU kthread, which first must be modified to handle the cases involving callback storms. Signed-off-by:
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Paul E. McKenney authored
Although rcu_yield() dropped from real-time to normal priority, there is always the possibility that the competing tasks have been niced. So nice to 19 in rcu_yield() to help ensure that other tasks have a better chance of running. Signed-off-by:
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Lai Jiangshan authored
Many rcu callbacks functions just call kfree() on the base structure. These functions are trivial, but their size adds up, and furthermore when they are used in a kernel module, that module must invoke the high-latency rcu_barrier() function at module-unload time. The kfree_rcu() function introduced by this commit addresses this issue. Rather than encoding a function address in the embedded rcu_head structure, kfree_rcu() instead encodes the offset of the rcu_head structure within the base structure. Because the functions are not allowed in the low-order 4096 bytes of kernel virtual memory, offsets up to 4095 bytes can be accommodated. If the offset is larger than 4095 bytes, a compile-time error will be generated in __kfree_rcu(). If this error is triggered, you can either fall back to use of call_rcu() or rearrange the structure to position the rcu_head structure into the first 4096 bytes. Note that the allowable offset might decrease in the future, for example, to allow something like kmem_cache_free_rcu(). The new kfree_rcu() function can replace code as follows: call_rcu(&p->rcu, simple_kfree_callback); where "simple_kfree_callback()" might be defined as follows: void simple_kfree_callback(struct rcu_head *p) { struct foo *q = container_of(p, struct foo, rcu); kfree(q); } with the following: kfree_rcu(&p->rcu, rcu); Note that the "rcu" is the name of a field in the structure being freed. The reason for using this rather than passing in a pointer to the base structure is that the above approach allows better type checking. This commit is based on earlier work by Lai Jiangshan and Manfred Spraul: Lai's V1 patch: http://lkml.org/lkml/2008/9/18/1 Manfred's patch: http://lkml.org/lkml/2009/1/2/115Signed-off-by:Manfred Spraul <manfred@colorfullife.com> Signed-off-by:
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Paul E. McKenney authored
The "preemptible" spelling is preferable. May as well fix it. Signed-off-by:
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Lai Jiangshan authored
Using __rcu_read_lock() in place of rcu_read_lock() leaves any debug state as it really should be, namely with the lock still held. Signed-off-by:
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