tools/perf/util/rlimit.c

Source file repositories/reference/linux-study-clean/tools/perf/util/rlimit.c

File Facts

System
Linux kernel
Corpus path
tools/perf/util/rlimit.c
Extension
.c
Size
1254 bytes
Lines
58
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

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");
		}
	}
}

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;
}

Annotation

Implementation Notes