Re: [PATCH bpf-next v2 35/35] perf: don't touch RLIMIT_MEMLOCK
From: Arnaldo Carvalho de Melo <acme@kernel.org>
Date: 2020-07-28 12:13:50
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Em Mon, Jul 27, 2020 at 11:09:43PM -0700, Andrii Nakryiko escreveu:
On Mon, Jul 27, 2020 at 12:21 PM Roman Gushchin [off-list ref] wrote:quoted
Since bpf stopped using memlock rlimit to limit the memory usage, there is no more reason for perf to alter its own limit. Signed-off-by: Roman Gushchin <redacted> ---Cc'd Armaldo, but I'm guessing it's a similar situation that latest perf might be running on older kernel and should keep working.
Yes, please leave it as is, the latest perf should continue working with older kernels, so if there is a way to figure out if the kernel running is one where BPF doesn't use memlock rlimit for that purpose, then in those cases we shouldn't use it. - Arnaldo
quoted
tools/perf/builtin-trace.c | 10 ---------- tools/perf/tests/builtin-test.c | 6 ------ tools/perf/util/Build | 1 - tools/perf/util/rlimit.c | 29 ----------------------------- tools/perf/util/rlimit.h | 6 ------ 5 files changed, 52 deletions(-) delete mode 100644 tools/perf/util/rlimit.c delete mode 100644 tools/perf/util/rlimit.h[...]
-- - Arnaldo