From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <4df9fa23fb84158408fd7ed61bc15fb4@quanstro.net>
To: 9fans@9fans.net
From: erik quanstrom <quanstro@quanstro.net>
Date: Tue, 22 Apr 2008 17:38:11 -0400
In-Reply-To: <4214f2078856cb97d6dfec57e09397bf@plan9.bell-labs.com>
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Subject: Re: [9fans] /lib/rfc
Topicbox-Message-UUID: 98200624-ead3-11e9-9d60-3106f5b1d025

> Yes, /lib/rfc/grabfc.  Uncomment this line:
>
> /cron/sys/cron:#30 9 * * *	local	/lib/rfc/grabrfc

thank you.  unfortunately, it turns out that this script causes
something that looks like deadlock between ramfs and ftpfs.
i didn't get a bead on ramfs before ftpfs exited but it was in
state Pread as was ramfs.

here's where ftpfs was

tyty# cd /proc/389580
tyty# cat fd
/lib/rfc
  0 r  c    0 (000000000000000a 0 00)     0        0 /dev/null
  1 w  c    0 (000000000000000a 0 00)     0        0 /dev/null
  2 w  M 256525 (0000000000000001 0 00)  8192   337626 /mnt/term/dev/cons
  3 rw |    0 (000000000023e801 0 00) 65536 17056533 #|/data
  4 rw M 258155 (0000000000000141 0 00)  8192     7835 /tmp/ftpo0000389580
  5 r  c    0 (0000000000000001 0 00)     0    75912 /dev/bintime
  6 rw M 258155 (0000000000000142 0 00)  8192    83648 /tmp/ftp00000389580
  7 rw I    1 (00000000000201ad 0 00)     0    86141 /net.alt/tcp/13/data
  8 rw M 258155 (0000000000000143 0 00)  8192   156468 /tmp/ftpa0000389580
  9 rw M 258155 (0000000000000144 0 00)  8192    24637 /tmp/ftpb0000389580
 10 rw M 258155 (0000000000000145 0 00)  8192    14741 /tmp/ftpc0000389580
 11 rw M 258155 (0000000000000146 0 00)  8192    18268 /tmp/ftpd0000389580
 12 rw M 258155 (0000000000000147 0 00)  8192    13356 /tmp/ftpe0000389580
 13 rw M 258155 (0000000000000148 0 00)  8192    15548 /tmp/ftpf0000389580
 14 rw M 258155 (0000000000000149 0 00)  8192    29417 /tmp/ftpg0000389580
 15 rw M 258155 (000000000000014a 0 00)  8192    34950 /tmp/ftph0000389580
 16 rw M 258155 (000000000000014b 0 00)  8192    13591 /tmp/ftpi0000389580
 17 rw M 258155 (000000000000014c 0 00)  8192     4892 /tmp/ftpj0000389580
 18 rw M 258155 (000000000000014d 0 00)  8192    16607 /tmp/ftpk0000389580
 19 rw M 258155 (000000000000014e 0 00)  8192     6641 /tmp/ftpl0000389580
 20 rw M 258155 (000000000000014f 0 00)  8192   221184 /tmp/ftpm0000389580
 22 rw I    1 (00000000000201cd 0 00)     0   221184 /net.alt/tcp/14/data
tyty# acid 389580
acid: lstk()
pread()+0x7 /sys/src/libc/9syscall/pread.s:5
read(fd=0x16,buf=0xdfffde00,n=0x1000)+0x2f /sys/src/libc/9sys/read.c:7
readfile1(node=0x100330)+0xdf /sys/src/cmd/ip/ftpfs/proto.c:941
	tries=0x0
	bp=0x67328
	off=0x36000
	buf=0x62206f74
	n=0x498
readfile(node=0x100330)+0x36 /sys/src/cmd/ip/ftpfs/proto.c:986
	inimage=0x1
	rv=0x8
ropen(f=0x9a8d8)+0x129 /sys/src/cmd/ip/ftpfs/ftpfs.c:463
io()+0x207 /sys/src/cmd/ip/ftpfs/ftpfs.c:279
	n=0xc
	buf=0x88
main(argv=0xdfffef7c,argc=0x1)+0x207 /sys/src/cmd/ip/ftpfs/ftpfs.c:184
	mountroot=0x2eaec
	mountpoint=0x2eae5
	cpassword=0xdfffef93
	_argc=0x61
	_args=0xdfffef91
	cp=0x0
	o=0x0
	p=0x3
_main+0x31 /sys/src/libc/386/main9.s:16

- erik