Blame SOURCES/powertop-2.3-fd-limit-err.patch
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diff -up powertop-2.4/src/perf/perf.cpp.orig powertop-2.4/src/perf/perf.cpp
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--- powertop-2.4/src/perf/perf.cpp.orig 2013-01-31 16:39:27.000000000 -0500
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+++ powertop-2.4/src/perf/perf.cpp 2013-09-19 10:36:02.298839248 -0400
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@@ -26,6 +26,7 @@
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#include <iostream>
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#include <fstream>
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+#include <errno.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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@@ -72,6 +73,7 @@ void perf_event::create_perf_event(char
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{
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struct perf_event_attr attr;
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int ret;
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+ int err;
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struct {
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__u64 count;
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@@ -107,10 +109,15 @@ void perf_event::create_perf_event(char
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perf_fd = sys_perf_event_open(&attr, -1, _cpu, -1, 0);
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if (perf_fd < 0) {
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+ err = errno;
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reset_display();
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- fprintf(stderr, _("PowerTOP %s needs the kernel to support the 'perf' subsystem\n"), POWERTOP_VERSION);
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- fprintf(stderr, _("as well as support for trace points in the kernel:\n"));
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- fprintf(stderr, "CONFIG_PERF_EVENTS=y\nCONFIG_PERF_COUNTERS=y\nCONFIG_TRACEPOINTS=y\nCONFIG_TRACING=y\n");
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+ if (err == EMFILE)
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+ fprintf(stderr, _("Too many open files, please increase the limit of open file descriptors.\n"));
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+ else {
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+ fprintf(stderr, _("PowerTOP %s needs the kernel to support the 'perf' subsystem\n"), POWERTOP_VERSION);
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+ fprintf(stderr, _("as well as support for trace points in the kernel:\n"));
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+ fprintf(stderr, "CONFIG_PERF_EVENTS=y\nCONFIG_PERF_COUNTERS=y\nCONFIG_TRACEPOINTS=y\nCONFIG_TRACING=y\n");
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+ }
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exit(EXIT_FAILURE);
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}
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if (read(perf_fd, &read_data, sizeof(read_data)) == -1) {
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