<div dir="ltr"><div>i am trying Juno <b>without </b>DVR and there are around 500 sub nets in each network node.</div><div><br></div>Network nodes have 500+ dnsmasq process which are configured to give ipv6,ipv4 addresses out of this some fluctuates between D and S state while others are in continuous S state.Probably because of too many processes in D state with "rtnetlink_rcv" in "wchan" its showing very high load average.<div><br></div><div><br></div><div>functions in stack when in D state:</div><div><br></div><div><font color="#000000"><span class="" style="font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff816360a9>]</span><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"> rtnetlink_rcv+0x19/0x30</span><br style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff81653e25>]</span><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"> netlink_unicast+0xd5/0x1b0</span><br style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff8165420e>]</span><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"> netlink_sendmsg+0x30e/0x680</span><br style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff8160e32b>]</span><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"> sock_sendmsg+0x8b/0xc0</span><br style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff8160e871>]</span><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"> SYSC_sendto+0x121/0x1c0</span><br style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff8160f25e>]</span><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"> SyS_sendto+0xe/0x10</span><br style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff817342dd>]</span><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"> system_call_fastpath+0x1a/0x1f</span><br style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffffffffffff>]</span><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"> 0xffffffffffffffff</span><br></font></div><div><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><font color="#000000"><br></font></span></div><div><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><font color="#000000">but in couple of seconds it changes to S state with this in stack,all idle process have this in stack.</font></span></div><div><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><font color="#000000"><br></font></span></div><div><span class="" style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff811d20d9>]</span><span style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"> poll_schedule_timeout+0x49/0x70</span><br style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff811d2ac6>]</span><span style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"> do_select+0x5b6/0x780</span><br style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff811d2e5c>]</span><span style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"> core_sys_select+0x1cc/0x2e0</span><br style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff811d301b>]</span><span style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"> SyS_select+0xab/0x100</span><br style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffff817342dd>]</span><span style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"> system_call_fastpath+0x1a/0x1f</span><br style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"><span class="" style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px">[<ffffffffffffffff>]</span><span style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"> 0xffffffffffffffff</span><span style="font-family:Arial,sans-serif;font-size:14px;line-height:20px"><font color="#000000"><br></font></span></div><div><br></div><div><font color="#333333" face="Arial, sans-serif"><span style="font-size:14px;line-height:20px">interface in which dnsmasq is listening has "</span></font><font color="#333333" face="Arial, sans-serif"><span style="font-size:14px;line-height:20px"> tentative dadfailed</span></font><span style="font-size:14px;line-height:20px;color:rgb(51,51,51);font-family:Arial,sans-serif">" in </span><span style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"> "scope global"  </span><span style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px">for ipv6 for all the dnsmasq process that are in D state.</span></div><div><span style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"><br></span></div><div><font color="#333333" face="Arial, sans-serif"><span style="font-size:14px;line-height:20px">i don't understand why duplicate ipv6 issue is coming when there are vlan tags to separate each sub net.For ipv4 duplicate IP issue is not coming for same subnet.</span></font></div><div><span style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;line-height:20px"><br></span></div><div><font color="#333333" face="Arial, sans-serif"><span style="font-size:14px;line-height:20px">Not able to understand why dnsmasq that are connected to interfaces that have "tentative dadfailed " continuously changes between S and D state while others are idle.</span></font></div><div><font color="#333333" face="Arial, sans-serif"><span style="font-size:14px;line-height:20px"><br></span></font></div><div><font color="#333333" face="Arial, sans-serif"><span style="font-size:14px;line-height:20px">attached is the strace while dnsmasq is in D state.</span></font></div><div><font color="#333333" face="Arial, sans-serif"><span style="font-size:14px;line-height:20px"><br></span></font></div><div><font color="#333333" face="Arial, sans-serif"><span style="font-size:14px;line-height:20px">Any idea about this issue?</span></font></div></div>