From: David Ahern <dsahern@gmail.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: acme@ghostprotocols.net, linux-kernel@vger.kernel.org,
Ingo Molnar <mingo@kernel.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Namhyung Kim <namhyung@kernel.org>,
Mike Galbraith <efault@gmx.de>,
Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH] perf record: mmap output file - RFC
Date: Wed, 09 Oct 2013 07:46:51 -0600 [thread overview]
Message-ID: <52555E4B.4020704@gmail.com> (raw)
In-Reply-To: <20131009133331.GC5459@krava.redhat.com>
On 10/9/13 7:33 AM, Jiri Olsa wrote:
>> +
>> + if (size > remaining) {
>> + memcpy(rec->mmap_addr + rec->mmap_offset, buf, remaining);
>> + rec->bytes_written += remaining;
>> +
>> + size -= remaining;
>> + buf += remaining;
>> +
>> + msync(rec->mmap_addr, rec->mmap_size, MS_ASYNC);
>> + munmap(rec->mmap_addr, rec->mmap_size);
>
> do we need msync call if munmap is called right away?
I was being overly cautious. I will remove it in v2.
David
prev parent reply other threads:[~2013-10-09 13:47 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-23 2:05 [PATCH] perf record: mmap output file - RFC David Ahern
2013-09-26 17:51 ` Jiri Olsa
2013-09-26 18:12 ` David Ahern
2013-09-26 18:23 ` Jiri Olsa
2013-09-26 23:17 ` David Ahern
2013-09-27 6:29 ` Ingo Molnar
2013-09-27 2:24 ` Namhyung Kim
2013-10-09 13:33 ` Jiri Olsa
2013-10-09 13:46 ` David Ahern [this message]
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