Re: port-alpha/55652 (bytes_transfer_eof_piod_write_i test causes kernel freeze)

[Rin Okuyama <rokuyama.rk%gmail.com@localhost>]

The following reply was made to PR port-alpha/55652; it has been noted by GNATS.

From: Rin Okuyama <rokuyama.rk%gmail.com@localhost>
To: "gnats-bugs%NetBSD.org@localhost" <gnats-bugs%NetBSD.org@localhost>
Cc: 
Subject: Re: port-alpha/55652 (bytes_transfer_eof_piod_write_i test causes
 kernel freeze)
Date: Tue, 6 Oct 2020 08:31:20 +0900

 I'm not sure whether this is related to the original problem or not,
 for -current as of yesterday on DS10,
 
 	fs/vfs/t_renamerace:*
 
 also causes hang (``*'' above changes from time to time? sometimes
 ffslog_renamerace_dirs, other times lfs_renamerace_cycle):
 
 ----
 # cd /usr/tests/fs/vfs && atf-run t_renamerace
 Content-Type: application/X-atf-tps; version="3"
 ...
 tc-start: 1601937221.477572, ffslog_renamerace_cycle
 tc-so:[   1.0000000] entropy: no seed from bootloader
 tc-so:[   1.0000000] entropy: ready
 tc-end: 1601937232.173994, ffslog_renamerace_cycle, passed
 tc-start: 1601937232.178267, ffslog_renamerace_dirs
 ^C^C^C
 ~Stopped in pid 705.1974 (t_renamerace) at       netbsd:cpu_Debugger+0x4:
 ret     zero,(ra)
 ----
 
 ``bt'' and ``trace/a'' for curlwp isn't interesting:
 
 ----
 db{0}> bt
 cpu_Debugger() at netbsd:cpu_Debugger+0x4
 comintr() at netbsd:comintr+0xb84
 alpha_shared_intr_wrapper() at netbsd:alpha_shared_intr_wrapper+0x38
 alpha_shared_intr_dispatch() at netbsd:alpha_shared_intr_dispatch+0x5c
 sio_iointr() at netbsd:sio_iointr+0x44
 interrupt() at netbsd:interrupt+0x268
 XentInt() at netbsd:XentInt+0x1c
 --- interrupt (from ipl 0) ---
 --- user mode ---
 db{0}> ps
 PID    LID S CPU     FLAGS       STRUCT LWP *               NAME WAIT
 705  >1974 7   0         0   fffffc003edbb300       t_renamerace
 705   1399 2   0     40000   fffffc00375bd280       t_renamerace
 705    691 3   0        80   fffffc003bb00ac0       t_renamerace parked
 705   2591 3   0        80   fffffc00375f0140        vmem_rehash parked
 705    720 5   0         0   fffffc00375f1ac0           (zombie)
 705    707 5   0         0   fffffc0037aa5580           (zombie)
 705    726 3   0        80   fffffc003bb01780         pmfsuspend parked
 ...
 db{0}> trace/a fffffc003edbb300
 trace: pid 705 lid 1974 at 0xfffffc0000495ea8
 alpha_softint_return() at netbsd:alpha_softint_return
 --- root of call graph ---
 db{0}> reboot 0x4
 ----
 
 Full console log is provided here:
 
 	http://www.netbsd.org/~rin/alpha_log_20201006.txt
 
 This occurs for kernel compiled by both GCC9 and GCC8.
 
 Thanks,
 rin