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author | Paolo Bonzini | 2019-08-09 16:53:39 +0200 |
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committer | Paolo Bonzini | 2019-08-09 16:53:39 +0200 |
commit | 0e1c438c44dd9cde56effb44c5f1cfeda72e108d (patch) | |
tree | fa3492d4d7d8b7444e5d8ebe6c78210826333e4b /tools/perf/util/rlimit.c | |
parent | selftests: kvm: Adding config fragments (diff) | |
parent | arm64: KVM: hyp: debug-sr: Mark expected switch fall-through (diff) | |
download | kernel-qcow2-linux-0e1c438c44dd9cde56effb44c5f1cfeda72e108d.tar.gz kernel-qcow2-linux-0e1c438c44dd9cde56effb44c5f1cfeda72e108d.tar.xz kernel-qcow2-linux-0e1c438c44dd9cde56effb44c5f1cfeda72e108d.zip |
Merge tag 'kvmarm-fixes-for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm fixes for 5.3
- A bunch of switch/case fall-through annotation, fixing one actual bug
- Fix PMU reset bug
- Add missing exception class debug strings
Diffstat (limited to 'tools/perf/util/rlimit.c')
-rw-r--r-- | tools/perf/util/rlimit.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/tools/perf/util/rlimit.c b/tools/perf/util/rlimit.c new file mode 100644 index 000000000000..13521d392a22 --- /dev/null +++ b/tools/perf/util/rlimit.c @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + +#include "util/debug.h" +#include "util/rlimit.h" +#include <sys/time.h> +#include <sys/resource.h> + +/* + * Bump the memlock so that we can get bpf maps of a reasonable size, + * like the ones used with 'perf trace' and with 'perf test bpf', + * improve this to some specific request if needed. + */ +void rlimit__bump_memlock(void) +{ + struct rlimit rlim; + + if (getrlimit(RLIMIT_MEMLOCK, &rlim) == 0) { + rlim.rlim_cur *= 4; + rlim.rlim_max *= 4; + + if (setrlimit(RLIMIT_MEMLOCK, &rlim) < 0) { + rlim.rlim_cur /= 2; + rlim.rlim_max /= 2; + + if (setrlimit(RLIMIT_MEMLOCK, &rlim) < 0) + pr_debug("Couldn't bump rlimit(MEMLOCK), failures may take place when creating BPF maps, etc\n"); + } + } +} |