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Date: Fri, 16 Nov 2012 03:28:59 +0200
From: Paul Schutte <sjpschutte@...il.com>
To: musl@...ts.openwall.com
Subject: Re: A few issues on MIPS and now on ARMEL

Thanks Rich !

It is working.

You guys are the best !

Don't know if anyone is interested, but this is the memory usage of the
glibc binary (dynamically linked, distro supplied) :
root      9931  0.4  0.4   4232  1020 pts/2    S+   03:23   0:00 /dnsmasq

Musl binary, statically linked:
root      9927  0.0  0.1    328   244 pts/2    S    03:20   0:00 ./dnsmasq

RSS size down from 1020 to 244, thus 25% of original consumption.

Regards
Paul

On Fri, Nov 16, 2012 at 2:18 AM, Rich Felker <dalias@...ifal.cx> wrote:

> On Thu, Nov 15, 2012 at 07:11:10PM -0500, Rich Felker wrote:
> > On Thu, Nov 15, 2012 at 06:37:25PM -0500, Rich Felker wrote:
> > > On Fri, Nov 16, 2012 at 12:21:11AM +0200, Paul Schutte wrote:
> > > > Hi guys,
> > > >
> > > > I am now hitting a similar problem on armel.
> > > >
> > > > I am cross-compiling "dnsmasq"
> > > >
> > > > Glibc strace:
> > > >
> > > > ---snip---
> > > > socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 5
> > > > fcntl64(5, F_GETFL)                     = 0x2 (flags O_RDWR)
> > > > fcntl64(5, F_SETFL, O_RDWR|O_NONBLOCK)  = 0
> > > > setsockopt(5, SOL_IP, IP_MTU_DISCOVER, [0], 4) = 0
> > > > setsockopt(5, SOL_IP, IP_PKTINFO, [1], 4) = 0
> > > > setsockopt(5, SOL_SOCKET, SO_BROADCAST, [1], 4) = 0
> > > > setsockopt(5, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
> > > >
> > > >
> > > > Musl strace:
> > > >
> > > > socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 5
> > > > fcntl64(5, F_GETFL)                     = 0x2 (flags O_RDWR)
> > > > fcntl64(5, F_SETFL, O_RDWR|O_NONBLOCK|O_LARGEFILE) = 0
> > > > setsockopt(5, SOL_IP, IP_MTU_DISCOVER, [0], 4) = 0
> > > > setsockopt(5, SOL_IP, IP_PKTINFO, [1], 4) = 0
> > > > setsockopt(5, SOL_SOCKET, SO_BROADCAST, [1], 4) = 0
> > > > setsockopt(5, SOL_SOCKET, *0xf /* SO_??? */*, [1], 4) = -1
> ENOPROTOOPT
> > > > (Protocol not available)
> > >
> > > Thanks for the report. I'll check and see if ARM has unusual
> > > definitions we're missing.
> >
> > This doesn't seem to be ARM-specific. Linux has reserved a number for
> > SO_REUSEPORT, but it's not implemented in the kernel it seems, and
> > musl is providing the value, presumably causing the app to use it and
> > think it works. I'm guessing I should just remove it, but it might be
> > possible/preferable to make setsockopt and getsockopt remap it to
> > SO_REUSEADDR internally. Ideas anyone?
>
> For now I've disabled it, matching what other libcs do on Linux.
> Changes are in current git.
>
> Rich
>

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