[PATCH] Packet loss when 'control' messages are present with large data (sendmsg(2))
markj at FreeBSD.org
Tue Aug 26 19:52:21 UTC 2014
On Tue, Aug 26, 2014 at 03:15:31PM -0400, John Baldwin wrote:
> On Tuesday, August 26, 2014 11:05:12 am Alan Somers wrote:
> > On Mon, Aug 25, 2014 at 1:52 PM, John Baldwin <jhb at freebsd.org> wrote:
> > > On Friday, August 22, 2014 01:34:28 PM Harald Schmalzbauer wrote:
> > >> Bezüglich Yuri's Nachricht vom 02.09.2013 06:54 (localtime):
> > >> > Please check in this patch:
> > >> > http://www.freebsd.org/cgi/query-pr.cgi?pr=181741
> > >> > Please MFC into 9.X
> > >> >
> > >> > Description of the problem is within PR.
> > >> >
> > >> > Thanks,
> > >> > Yuri
> > >>
> > >> Hello,
> > >>
> > >> I guess this fix should make it into 10.1.
> > >> Can someone check please?
> > >
> > > A fix has to make into HEAD first. I've cc'd Alan who responded to the bug.
> > > Alan, note that glebius@ already committed the test case to HEAD a while ago.
> > First, Gleb's testcase needs to be converted to ATF. This would be a
> > good exercise for anybody who's new to ATF and wants some practice.
> > Anybody interested?
> While that would be nice, I don't know that it's quite fair to require the
> test to be converted before working on a possible fix. The existing test
> doesn't seem that hard to run by hand:
> % cd work/freebsd/head/tools/regression/sockets/unix_passfd/
> % make
> % > ./unix_passfd
> beginning test1-simplesendfd
> test1-simplesendfd passed
> beginning test8-rigths+creds+payload
> unix_passfd: test8-rigths+creds+payload: recvmsg: 24 bytes received
> I only say this because in the bug followup you seemed to have described a
> possible solution so it seems that you would be able to develop a fix quicker
> than other folks since you are already familiar with the issues involved.
> (Also, you've fixed other related issues recently.)
As it happens, I went ahead and did this anyway:
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