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| author | Alexei Starovoitov <ast@plumgrid.com> | 2015-10-07 22:23:22 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-10-12 19:13:36 -0700 |
| commit | aaac3ba95e4c8b496d22f68bd1bc01cfbf525eca (patch) | |
| tree | fa5df3122c2576bd2df76f1494c88619b22b6f08 /include/linux/sched.h | |
| parent | 1be7f75d1668d6296b80bf35dcf6762393530afc (diff) | |
| download | lwn-aaac3ba95e4c8b496d22f68bd1bc01cfbf525eca.tar.gz lwn-aaac3ba95e4c8b496d22f68bd1bc01cfbf525eca.zip | |
bpf: charge user for creation of BPF maps and programs
since eBPF programs and maps use kernel memory consider it 'locked' memory
from user accounting point of view and charge it against RLIMIT_MEMLOCK limit.
This limit is typically set to 64Kbytes by distros, so almost all
bpf+tracing programs would need to increase it, since they use maps,
but kernel charges maximum map size upfront.
For example the hash map of 1024 elements will be charged as 64Kbyte.
It's inconvenient for current users and changes current behavior for root,
but probably worth doing to be consistent root vs non-root.
Similar accounting logic is done by mmap of perf_event.
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index b7b9501b41af..4817df5fffae 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -840,7 +840,7 @@ struct user_struct { struct hlist_node uidhash_node; kuid_t uid; -#ifdef CONFIG_PERF_EVENTS +#if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) atomic_long_t locked_vm; #endif }; |