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bae77c5eb5
linux/kernel/bpf
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Song Liu bae77c5eb5 bpf: enable stackmap with build_id in nmi context 
Currently, we cannot parse build_id in nmi context because of
up_read(&current->mm->mmap_sem), this makes stackmap with build_id
less useful. This patch enables parsing build_id in nmi by putting
the up_read() call in irq_work. To avoid memory allocation in nmi
context, we use per cpu variable for the irq_work. As a result, only
one irq_work per cpu is allowed. If the irq_work is in-use, we
fallback to only report ips.

Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-05-14 23:29:45 +02:00
..
arraymap.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-04-25 23:04:22 -04:00
bpf_lru_list.c bpf: lru: Lower the PERCPU_NR_SCANS from 16 to 4 2017-04-17 13:55:52 -04:00
bpf_lru_list.h bpf: Only set node->ref = 1 if it has not been set 2017-09-01 09:57:39 -07:00
btf.c bpf: btf: Add struct bpf_btf_info 2018-05-09 17:25:13 +02:00
cgroup.c bpf: Hooks for sys_bind 2018-03-31 02:15:18 +02:00
core.c bpf: export bpf_event_output() 2018-05-04 23:41:03 +02:00
cpumap.c xdp: transition into using xdp_frame for return API 2018-04-17 10:50:29 -04:00
devmap.c bpf: add helper for copying attrs to struct bpf_map 2018-01-14 23:36:29 +01:00
disasm.c bpf: Remove struct bpf_verifier_env argument from print_bpf_insn 2018-03-23 17:38:57 +01:00
disasm.h bpf: Remove struct bpf_verifier_env argument from print_bpf_insn 2018-03-23 17:38:57 +01:00
hashtab.c bpf: add helper for copying attrs to struct bpf_map 2018-01-14 23:36:29 +01:00
helpers.c bpf: rename ARG_PTR_TO_STACK 2017-01-09 16:56:27 -05:00
inode.c bpf: remove tracepoints from bpf core 2018-04-30 10:55:56 +02:00
lpm_trie.c bpf: fix rcu lockdep warning for lpm_trie map_free callback 2018-02-22 21:29:12 +01:00
Makefile bpf: introduce new bpf AF_XDP map type BPF_MAP_TYPE_XSKMAP 2018-05-03 15:55:24 -07:00
map_in_map.c bpf: Add syscall lookup support for fd array and htab 2017-06-29 13:13:25 -04:00
map_in_map.h bpf: Add syscall lookup support for fd array and htab 2017-06-29 13:13:25 -04:00
offload.c bpf: offload: allow offloaded programs to use perf event arrays 2018-05-04 23:41:03 +02:00
percpu_freelist.c bpf: fix lockdep splat 2017-11-15 19:46:32 +09:00
percpu_freelist.h bpf: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
sockmap.c bpf: sockmap, fix error handling in redirect failures 2018-05-02 15:30:45 -07:00
stackmap.c bpf: enable stackmap with build_id in nmi context 2018-05-14 23:29:45 +02:00
syscall.c bpf: btf: Add struct bpf_btf_info 2018-05-09 17:25:13 +02:00
tnum.c bpf/verifier: improve register value range tracking with ARSH 2018-04-29 08:45:53 -07:00
verifier.c bpf: xdp: allow offloads to store into rx_queue_index 2018-05-09 18:04:36 +02:00
xskmap.c bpf, xskmap: fix crash in xsk_map_alloc error path handling 2018-05-04 14:55:54 -07:00