9912f64a58
A bug fixed in libtrace 1.8.2 breaks trace sample processing on machines with a large number of CPUs. Backport patch that fixes this issue. Resolves: RHEL-93863 Signed-off-by: Tomas Glozar <tglozar@redhat.com>
32 lines
1.0 KiB
Diff
32 lines
1.0 KiB
Diff
From 3f5dc533a8306527b77bcf9187768ba0eaf910b6 Mon Sep 17 00:00:00 2001
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From: Haiyue Wang <haiyuewa@163.com>
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Date: Fri, 14 Feb 2025 20:35:17 +0800
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Subject: [PATCH] libtracefs: Fix the read file failure code checking
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The failure error code '-1' will be treated as 'true'. Only nonzero
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number has buffer data returned successfully.
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Link: https://lore.kernel.org/20250214123531.13883-1-haiyuewa@163.com
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Signed-off-by: Haiyue Wang <haiyuewa@163.com>
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Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
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---
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src/tracefs-record.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/tracefs-record.c b/src/tracefs-record.c
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index 932e8b4..1a4a16c 100644
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--- a/src/tracefs-record.c
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+++ b/src/tracefs-record.c
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@@ -550,7 +550,7 @@ static int init_splice(struct tracefs_cpu *tcpu)
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if (ret < 0)
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return ret;
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- if (str_read_file("/proc/sys/fs/pipe-max-size", &buf, false)) {
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+ if (str_read_file("/proc/sys/fs/pipe-max-size", &buf, false) > 0) {
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int size = atoi(buf);
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fcntl(tcpu->splice_pipe[0], F_SETPIPE_SZ, &size);
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free(buf);
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--
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2.49.0
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