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Yan Zhai c3e54a754b bpf: report RCU QS in cpumap kthread 
[ Upstream commit 00bf631224 ]

When there are heavy load, cpumap kernel threads can be busy polling
packets from redirect queues and block out RCU tasks from reaching
quiescent states. It is insufficient to just call cond_resched() in such
context. Periodically raise a consolidated RCU QS before cond_resched
fixes the problem.

Fixes: 6710e11269 ("bpf: introduce new bpf cpu map type BPF_MAP_TYPE_CPUMAP")
Reviewed-by: Jesper Dangaard Brouer <hawk@kernel.org>
Signed-off-by: Yan Zhai <yan@cloudflare.com>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Link: https://lore.kernel.org/r/c17b9f1517e19d813da3ede5ed33ee18496bb5d8.1710877680.git.yan@cloudflare.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2024-03-26 18:18:59 -04:00
..
preload
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Kconfig
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Makefile
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arraymap.c bpf: Set need_defer as false when clearing fd array during map free 2024-02-05 20:16:51 +00:00
bloom_filter.c
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bpf_cgrp_storage.c
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bpf_inode_storage.c
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bpf_iter.c bpf: Add __bpf_kfunc_{start,end}_defs macros 2023-11-01 22:33:53 -07:00
bpf_local_storage.c
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bpf_lru_list.c
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bpf_lru_list.h
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bpf_lsm.c
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bpf_struct_ops.c
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bpf_struct_ops_types.h
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bpf_task_storage.c
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btf.c bpf: Add bpf_sock_addr_set_sun_path() to allow writing unix sockaddr from bpf 2023-10-11 16:29:25 -07:00
cgroup.c for-6.7/io_uring-sockopt-2023-10-30 2023-11-01 11:16:34 -10:00
cgroup_iter.c bpf: Let verifier consider {task,cgroup} is trusted in bpf_iter_reg 2023-11-07 15:24:25 -08:00
core.c bpf: hardcode BPF_PROG_PACK_SIZE to 2MB * num_possible_nodes() 2024-03-26 18:18:27 -04:00
cpumap.c bpf: report RCU QS in cpumap kthread 2024-03-26 18:18:59 -04:00
cpumask.c bpf: Add __bpf_kfunc_{start,end}_defs macros 2023-11-01 22:33:53 -07:00
devmap.c bpf: Fix DEVMAP_HASH overflow check on 32-bit arches 2024-03-26 18:18:24 -04:00
disasm.c
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disasm.h
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dispatcher.c
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hashtab.c bpf: Fix hashtab overflow check on 32-bit arches 2024-03-26 18:18:24 -04:00
helpers.c bpf: Mark bpf_spin_{lock,unlock}() helpers with notrace correctly 2024-03-26 18:18:13 -04:00
inode.c bpf: convert to new timestamp accessors 2023-10-18 14:08:30 +02:00
link_iter.c
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local_storage.c
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log.c
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lpm_trie.c bpf, lpm: Fix check prefixlen before walking trie 2024-01-25 15:44:45 -08:00
map_in_map.c bpf: Defer the free of inner map when necessary 2024-01-25 15:44:48 -08:00
map_in_map.h bpf: Add map and need_defer parameters to .map_fd_put_ptr() 2024-01-25 15:44:48 -08:00
map_iter.c bpf: Add __bpf_kfunc_{start,end}_defs macros 2023-11-01 22:33:53 -07:00
memalloc.c bpf: Use c->unit_size to select target cache during free 2024-01-25 15:44:54 -08:00
mmap_unlock_work.h
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mprog.c bpf: Handle bpf_mprog_query with NULL entry 2023-10-06 17:11:20 -07:00
net_namespace.c
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offload.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-09-21 21:49:45 +02:00
percpu_freelist.c
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percpu_freelist.h
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prog_iter.c
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queue_stack_maps.c
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reuseport_array.c
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ringbuf.c bpf: Fold smp_mb__before_atomic() into atomic_set_release() 2023-10-24 14:26:07 +02:00
stackmap.c bpf: Fix stackmap overflow check on 32-bit arches 2024-03-26 18:18:24 -04:00
syscall.c bpf: Set uattr->batch.count as zero before batched update or deletion 2024-02-05 20:16:52 +00:00
sysfs_btf.c
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task_iter.c bpf: Let verifier consider {task,cgroup} is trusted in bpf_iter_reg 2023-11-07 15:24:25 -08:00
tcx.c bpf, tcx: Get rid of tcx_link_const 2023-10-23 15:01:53 -07:00
tnum.c
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trampoline.c
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verifier.c bpf: Fix warning for bpf_cpumask in verifier 2024-03-26 18:17:52 -04:00