<div dir="ltr">Hello,<br class="gmail-Apple-interchange-newline"><div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div><br></div><div>I found that systemd entered the D state. From the kernel stack, it was blocked at __skb_wait_for_more_packets. <br>Is there any way to determine where the problem occurred? Thank you~<br><br><b><i># cat /proc/1/stack</i></b><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">[<0>] __skb_wait_for_more_packets+0x134/0x1a0<br>[<0>] __unix_dgram_recvmsg+0xdc/0x380<br>[<0>] unix_seqpacket_recvmsg+0x60/0xa0<br>[<0>] ____sys_recvmsg+0x1f8/0x2b0<br>[<0>] ___sys_recvmsg+0x98/0x100<br>[<0>] __sys_recvmsg+0x88/0xf0<br>[<0>] __arm64_sys_recvmsg+0x2c/0x40<br>[<0>] invoke_syscall+0x50/0x140<br>[<0>] el0_svc_common.constprop.0+0x68/0x140<br>[<0>] do_el0_svc+0x2c/0x90<br>[<0>] el0_svc+0x30/0xb0<br>[<0>] el0t_64_sync_handler+0x124/0x130<br>[<0>] el0t_64_sync+0x190/0x194</blockquote><br><i><b># cat /proc/1/status</b></i><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Name:        systemd<br>Umask:        0000<br>State:        D (disk sleep)<br>Tgid:        1<br>Ngid:        0<br>Pid:        1<br>PPid:        0<br>TracerPid:        0<br>Uid:        0        0        0        0<br>Gid:        0        0        0        0<br>FDSize:        256<br>Groups:        <br> NStgid:        1<br>NSpid:        1<br>NSpgid:        1<br>NSsid:        1<br>VmPeak:           22332 kB<br>VmSize:           22296 kB<br>VmLck:               0 kB<br>VmPin:               0 kB<br>VmHWM:           12840 kB<br>VmRSS:           12836 kB<br>RssAnon:            3932 kB<br>RssFile:            8904 kB<br>RssShmem:               0 kB<br>VmData:            3340 kB<br>VmStk:             132 kB<br>VmExe:              84 kB<br>VmLib:           15676 kB<br>VmPTE:              84 kB<br>VmSwap:               0 kB<br>HugetlbPages:               0 kB<br>CoreDumping:        0<br>THP_enabled:        0<br>Threads:        1<br>SigQ:        2/239905<br>SigPnd:        0000000000000000<br>ShdPnd:        0000000000010000<br>SigBlk:        7fefc1fe28014a03<br>SigIgn:        0000000000001000<br>SigCgt:        00000000000004ec<br>CapInh:        0000000000000000<br>CapPrm:        000001ffffffffff<br>CapEff:        000001ffffffffff<br>CapBnd:        000001ffffffffff<br>CapAmb:        0000000000000000<br>NoNewPrivs:        0<br>Seccomp:        0<br>Seccomp_filters:        0<br>Speculation_Store_Bypass:        thread vulnerable<br>SpeculationIndirectBranch:        unknown<br>Cpus_allowed:        fff<br>Cpus_allowed_list:        0-11<br>Mems_allowed:        0001<br>Mems_allowed_list:        0<br>voluntary_ctxt_switches:        2594<br>nonvoluntary_ctxt_switches:        576</blockquote></div><div><br></div><div>Best regards,  <font color="#888888"><br>Alien Kong</font></div></div>