From e093a222d7cba1eb6c36887e58ce8a4ff249f1c6 Mon Sep 17 00:00:00 2001 From: Yang Jihong Date: Mon, 23 Oct 2023 03:31:44 +0000 Subject: perf evsel: Rename evsel__increase_rlimit to rlimit__increase_nofile evsel__increase_rlimit() helper does nothing with evsel, and description of the functionality is inaccurate, rename it and move to util/rlimit.c. By the way, fix a checkppatch warning about misplaced license tag: WARNING: Misplaced SPDX-License-Identifier tag - use line 1 instead #160: FILE: tools/perf/util/rlimit.h:3: /* SPDX-License-Identifier: LGPL-2.1 */ No functional change. Signed-off-by: Yang Jihong Link: https://lore.kernel.org/r/20231023033144.1011896-1-yangjihong1@huawei.com Signed-off-by: Namhyung Kim --- tools/perf/util/rlimit.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'tools/perf/util/rlimit.c') diff --git a/tools/perf/util/rlimit.c b/tools/perf/util/rlimit.c index 13521d392a22..f857405fe1aa 100644 --- a/tools/perf/util/rlimit.c +++ b/tools/perf/util/rlimit.c @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: LGPL-2.1 */ +#include #include "util/debug.h" #include "util/rlimit.h" #include @@ -27,3 +28,30 @@ void rlimit__bump_memlock(void) } } } + +bool rlimit__increase_nofile(enum rlimit_action *set_rlimit) +{ + int old_errno; + struct rlimit l; + + if (*set_rlimit < INCREASED_MAX) { + old_errno = errno; + + if (getrlimit(RLIMIT_NOFILE, &l) == 0) { + if (*set_rlimit == NO_CHANGE) { + l.rlim_cur = l.rlim_max; + } else { + l.rlim_cur = l.rlim_max + 1000; + l.rlim_max = l.rlim_cur; + } + if (setrlimit(RLIMIT_NOFILE, &l) == 0) { + (*set_rlimit) += 1; + errno = old_errno; + return true; + } + } + errno = old_errno; + } + + return false; +} -- cgit