controls tcp packetization-layer ..

$cat /proc/sys/net/ipv4/tcp_mtu_probing
0
$
tcp_mtu_probing - INTEGER

Controls TCP Packetization-Layer Path MTU Discovery.
Takes three values:

0 - Disabled
1 - Disabled by default, enabled when an ICMP black hole detected
2 - Always enabled, use initial MSS of tcp_base_mss.

source :
Linux kernel Documentation. 2.6.32

   147:                         /* Black hole detection */
   148:                         tcp_mtu_probing(icsk, sk);
   149:
android.git.kernel.org/kernel/msm.git - GPL - C - More from msm.git »

boot/current/System.map
 22728: c044a390 B sysctl_tcp_workaround_signed_windows
 22729: c044a394 B sysctl_tcp_mtu_probing
 22730: c044a398 B sysctl_tcp_orphan_retries
download.asn.pl/.../lintrack-2.0/pkg/linux-2.6.17-8-big.pkg.tar.gz - Unknown


Path MTU discovery (PMTUD) is a technique in computer networking for
 determining the maximum transmission unit (MTU) size on the network
 path between two Internet Protocol (IP) hosts, usually with the goal of
 avoiding IP fragmentation.


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