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
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Kconfig	bpf: enable stackmap with build_id in nmi context	2018-05-14 23:29:45 +02:00
Makefile	…
calibrate.c	…
do_mounts.c	…
do_mounts.h	…
do_mounts_initrd.c	…
do_mounts_md.c	…
do_mounts_rd.c	…
init_task.c	…
initramfs.c	…
main.c	seq_file: allocate seq_file from kmem_cache	2018-04-11 10:28:36 -07:00
noinitramfs.c	…
version.c	…