From: Jiri Olsa <jolsa@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org, Namhyung Kim <namhyung@kernel.org>,
Jiri Olsa <jolsa@kernel.org>
Subject: [PATCH 1/6] perf tools: Handle EINTR error for readn/writen
Date: Tue, 29 Apr 2014 15:47:45 +0200 [thread overview]
Message-ID: <1398779270-10271-2-git-send-email-jolsa@kernel.org> (raw)
In-Reply-To: <1398779270-10271-1-git-send-email-jolsa@kernel.org>
From: Namhyung Kim <namhyung@kernel.org>
Those readn/writen functions are to ensure read/write does I/O for
a given size exactly. But ion() - its implementation - does not
handle in case it returns prematurely due to a signal. As it's not
an error itself so just retry the operation.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1398346054-3322-1-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/util.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 9f66549..7fff6be 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -166,6 +166,8 @@ static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
ssize_t ret = is_read ? read(fd, buf, left) :
write(fd, buf, left);
+ if (ret < 0 && errno == EINTR)
+ continue;
if (ret <= 0)
return ret;
--
1.8.3.1
next prev parent reply other threads:[~2014-04-29 13:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-30 10:11 [GIT PULL 0/6] perf/core improvements and fixes Jiri Olsa
2014-04-29 13:47 ` Jiri Olsa [this message]
2014-04-29 13:47 ` [PATCH 2/6] perf tools: Parse tracepoints with '-' in system name Jiri Olsa
2014-04-29 13:47 ` [PATCH 3/6] perf tests: Add numeric identifier to evlist_test Jiri Olsa
2014-04-29 13:47 ` [PATCH 4/6] perf tests: Add a test of kvm-390: trace event Jiri Olsa
2014-04-29 13:47 ` [PATCH 5/6] perf tools: Move u64_swap union Jiri Olsa
2014-04-29 13:47 ` [PATCH 6/6] perf tools ARM64: Wire up perf_regs and unwind support Jiri Olsa
2014-05-01 6:26 ` [GIT PULL 0/6] perf/core improvements and fixes Ingo Molnar
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