* Re: [uml-devel] Problem with /dev/random and rngd daemon
@ 2005-06-01 17:57 Anthony Brock
0 siblings, 0 replies; 6+ messages in thread
From: Anthony Brock @ 2005-06-01 17:57 UTC (permalink / raw)
To: jdike; +Cc: user-mode-linux-devel
Okay, this is a little weird. It worked the first time I attempted to start it. However, I then killed it, killed rngd on the first host and restarted it on the first host. Now it fails again on the second host.
I'm wondering if the first host to launch is exhausting the entropy pool and the second host is attempting to read from an empty pool. If this is the case, then I have no idea how you could resolve this with multiple UML instances per host. In any case, here is the strace:
execve("/usr/sbin/rngd", ["/usr/sbin/rngd", "-r", "/dev/hwrng"], [/* 12 vars */]) = 0
uname({sys="Linux", node="butternut.ous.edu", ...}) = 0
brk(0) = 0x804f000
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40017000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=8879, ...}) = 0
old_mmap(NULL, 8879, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40018000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libpthread.so.0", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340A\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=81127, ...}) = 0
old_mmap(NULL, 331716, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4001b000
old_mmap(0x40028000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0xc000) = 0x40028000
old_mmap(0x4002a000, 270276, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4002a000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\360^\1"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1244688, ...}) = 0
old_mmap(NULL, 1254852, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4006c000
old_mmap(0x40194000, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x127000) = 0x40194000
old_mmap(0x4019c000, 9668, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4019c000
close(3) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x4019f000
munmap(0x40018000, 8879) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0
setrlimit(RLIMIT_STACK, {rlim_cur=2044*1024, rlim_max=RLIM_INFINITY}) = 0
getpid() = 1093
rt_sigaction(SIGRTMIN, {0x40023030, [], 0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x40023080, [], 0}, NULL, 8) = 0
rt_sigaction(SIGRT_2, {0x40023150, [], 0}, NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [RTMIN], NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RT_1], NULL, 8) = 0
_sysctl({{CTL_KERN, KERN_VERSION}, 2, 0xbfb50054, 30, (nil), 0}) = 0
brk(0) = 0x804f000
brk(0x8070000) = 0x8070000
brk(0) = 0x8070000
close(3) = -1 EBADF (Bad file descriptor)
close(4) = -1 EBADF (Bad file descriptor)
close(5) = -1 EBADF (Bad file descriptor)
close(6) = -1 EBADF (Bad file descriptor)
close(7) = -1 EBADF (Bad file descriptor)
close(8) = -1 EBADF (Bad file descriptor)
close(9) = -1 EBADF (Bad file descriptor)
close(10) = -1 EBADF (Bad file descriptor)
close(11) = -1 EBADF (Bad file descriptor)
close(12) = -1 EBADF (Bad file descriptor)
close(13) = -1 EBADF (Bad file descriptor)
close(14) = -1 EBADF (Bad file descriptor)
close(15) = -1 EBADF (Bad file descriptor)
close(16) = -1 EBADF (Bad file descriptor)
close(17) = -1 EBADF (Bad file descriptor)
close(18) = -1 EBADF (Bad file descriptor)
close(19) = -1 EBADF (Bad file descriptor)
close(20) = -1 EBADF (Bad file descriptor)
close(21) = -1 EBADF (Bad file descriptor)
close(22) = -1 EBADF (Bad file descriptor)
close(23) = -1 EBADF (Bad file descriptor)
close(24) = -1 EBADF (Bad file descriptor)
close(25) = -1 EBADF (Bad file descriptor)
close(26) = -1 EBADF (Bad file descriptor)
close(27) = -1 EBADF (Bad file descriptor)
close(28) = -1 EBADF (Bad file descriptor)
close(29) = -1 EBADF (Bad file descriptor)
close(30) = -1 EBADF (Bad file descriptor)
close(31) = -1 EBADF (Bad file descriptor)
close(32) = -1 EBADF (Bad file descriptor)
close(33) = -1 EBADF (Bad file descriptor)
close(34) = -1 EBADF (Bad file descriptor)
close(35) = -1 EBADF (Bad file descriptor)
close(36) = -1 EBADF (Bad file descriptor)
close(37) = -1 EBADF (Bad file descriptor)
close(38) = -1 EBADF (Bad file descriptor)
close(39) = -1 EBADF (Bad file descriptor)
close(40) = -1 EBADF (Bad file descriptor)
close(41) = -1 EBADF (Bad file descriptor)
close(42) = -1 EBADF (Bad file descriptor)
close(43) = -1 EBADF (Bad file descriptor)
close(44) = -1 EBADF (Bad file descriptor)
close(45) = -1 EBADF (Bad file descriptor)
close(46) = -1 EBADF (Bad file descriptor)
close(47) = -1 EBADF (Bad file descriptor)
close(48) = -1 EBADF (Bad file descriptor)
close(49) = -1 EBADF (Bad file descriptor)
close(50) = -1 EBADF (Bad file descriptor)
close(51) = -1 EBADF (Bad file descriptor)
close(52) = -1 EBADF (Bad file descriptor)
close(53) = -1 EBADF (Bad file descriptor)
close(54) = -1 EBADF (Bad file descriptor)
close(55) = -1 EBADF (Bad file descriptor)
close(56) = -1 EBADF (Bad file descriptor)
close(57) = -1 EBADF (Bad file descriptor)
close(58) = -1 EBADF (Bad file descriptor)
close(59) = -1 EBADF (Bad file descriptor)
close(60) = -1 EBADF (Bad file descriptor)
close(61) = -1 EBADF (Bad file descriptor)
close(62) = -1 EBADF (Bad file descriptor)
close(63) = -1 EBADF (Bad file descriptor)
close(64) = -1 EBADF (Bad file descriptor)
close(65) = -1 EBADF (Bad file descriptor)
close(66) = -1 EBADF (Bad file descriptor)
close(67) = -1 EBADF (Bad file descriptor)
close(68) = -1 EBADF (Bad file descriptor)
close(69) = -1 EBADF (Bad file descriptor)
close(70) = -1 EBADF (Bad file descriptor)
close(71) = -1 EBADF (Bad file descriptor)
close(72) = -1 EBADF (Bad file descriptor)
close(73) = -1 EBADF (Bad file descriptor)
close(74) = -1 EBADF (Bad file descriptor)
close(75) = -1 EBADF (Bad file descriptor)
close(76) = -1 EBADF (Bad file descriptor)
close(77) = -1 EBADF (Bad file descriptor)
close(78) = -1 EBADF (Bad file descriptor)
close(79) = -1 EBADF (Bad file descriptor)
close(80) = -1 EBADF (Bad file descriptor)
close(81) = -1 EBADF (Bad file descriptor)
close(82) = -1 EBADF (Bad file descriptor)
close(83) = -1 EBADF (Bad file descriptor)
close(84) = -1 EBADF (Bad file descriptor)
close(85) = -1 EBADF (Bad file descriptor)
close(86) = -1 EBADF (Bad file descriptor)
close(87) = -1 EBADF (Bad file descriptor)
close(88) = -1 EBADF (Bad file descriptor)
close(89) = -1 EBADF (Bad file descriptor)
close(90) = -1 EBADF (Bad file descriptor)
close(91) = -1 EBADF (Bad file descriptor)
close(92) = -1 EBADF (Bad file descriptor)
close(93) = -1 EBADF (Bad file descriptor)
close(94) = -1 EBADF (Bad file descriptor)
close(95) = -1 EBADF (Bad file descriptor)
close(96) = -1 EBADF (Bad file descriptor)
close(97) = -1 EBADF (Bad file descriptor)
close(98) = -1 EBADF (Bad file descriptor)
close(99) = -1 EBADF (Bad file descriptor)
close(100) = -1 EBADF (Bad file descriptor)
close(101) = -1 EBADF (Bad file descriptor)
close(102) = -1 EBADF (Bad file descriptor)
close(103) = -1 EBADF (Bad file descriptor)
close(104) = -1 EBADF (Bad file descriptor)
close(105) = -1 EBADF (Bad file descriptor)
close(106) = -1 EBADF (Bad file descriptor)
close(107) = -1 EBADF (Bad file descriptor)
close(108) = -1 EBADF (Bad file descriptor)
close(109) = -1 EBADF (Bad file descriptor)
close(110) = -1 EBADF (Bad file descriptor)
close(111) = -1 EBADF (Bad file descriptor)
close(112) = -1 EBADF (Bad file descriptor)
close(113) = -1 EBADF (Bad file descriptor)
close(114) = -1 EBADF (Bad file descriptor)
close(115) = -1 EBADF (Bad file descriptor)
close(116) = -1 EBADF (Bad file descriptor)
close(117) = -1 EBADF (Bad file descriptor)
close(118) = -1 EBADF (Bad file descriptor)
close(119) = -1 EBADF (Bad file descriptor)
close(120) = -1 EBADF (Bad file descriptor)
close(121) = -1 EBADF (Bad file descriptor)
close(122) = -1 EBADF (Bad file descriptor)
close(123) = -1 EBADF (Bad file descriptor)
close(124) = -1 EBADF (Bad file descriptor)
close(125) = -1 EBADF (Bad file descriptor)
close(126) = -1 EBADF (Bad file descriptor)
close(127) = -1 EBADF (Bad file descriptor)
close(128) = -1 EBADF (Bad file descriptor)
close(129) = -1 EBADF (Bad file descriptor)
close(130) = -1 EBADF (Bad file descriptor)
close(131) = -1 EBADF (Bad file descriptor)
close(132) = -1 EBADF (Bad file descriptor)
close(133) = -1 EBADF (Bad file descriptor)
close(134) = -1 EBADF (Bad file descriptor)
close(135) = -1 EBADF (Bad file descriptor)
close(136) = -1 EBADF (Bad file descriptor)
close(137) = -1 EBADF (Bad file descriptor)
close(138) = -1 EBADF (Bad file descriptor)
close(139) = -1 EBADF (Bad file descriptor)
close(140) = -1 EBADF (Bad file descriptor)
close(141) = -1 EBADF (Bad file descriptor)
close(142) = -1 EBADF (Bad file descriptor)
close(143) = -1 EBADF (Bad file descriptor)
close(144) = -1 EBADF (Bad file descriptor)
close(145) = -1 EBADF (Bad file descriptor)
close(146) = -1 EBADF (Bad file descriptor)
close(147) = -1 EBADF (Bad file descriptor)
close(148) = -1 EBADF (Bad file descriptor)
close(149) = -1 EBADF (Bad file descriptor)
close(150) = -1 EBADF (Bad file descriptor)
close(151) = -1 EBADF (Bad file descriptor)
close(152) = -1 EBADF (Bad file descriptor)
close(153) = -1 EBADF (Bad file descriptor)
close(154) = -1 EBADF (Bad file descriptor)
close(155) = -1 EBADF (Bad file descriptor)
close(156) = -1 EBADF (Bad file descriptor)
close(157) = -1 EBADF (Bad file descriptor)
close(158) = -1 EBADF (Bad file descriptor)
close(159) = -1 EBADF (Bad file descriptor)
close(160) = -1 EBADF (Bad file descriptor)
close(161) = -1 EBADF (Bad file descriptor)
close(162) = -1 EBADF (Bad file descriptor)
close(163) = -1 EBADF (Bad file descriptor)
close(164) = -1 EBADF (Bad file descriptor)
close(165) = -1 EBADF (Bad file descriptor)
close(166) = -1 EBADF (Bad file descriptor)
close(167) = -1 EBADF (Bad file descriptor)
close(168) = -1 EBADF (Bad file descriptor)
close(169) = -1 EBADF (Bad file descriptor)
close(170) = -1 EBADF (Bad file descriptor)
close(171) = -1 EBADF (Bad file descriptor)
close(172) = -1 EBADF (Bad file descriptor)
close(173) = -1 EBADF (Bad file descriptor)
close(174) = -1 EBADF (Bad file descriptor)
close(175) = -1 EBADF (Bad file descriptor)
close(176) = -1 EBADF (Bad file descriptor)
close(177) = -1 EBADF (Bad file descriptor)
close(178) = -1 EBADF (Bad file descriptor)
close(179) = -1 EBADF (Bad file descriptor)
close(180) = -1 EBADF (Bad file descriptor)
close(181) = -1 EBADF (Bad file descriptor)
close(182) = -1 EBADF (Bad file descriptor)
close(183) = -1 EBADF (Bad file descriptor)
close(184) = -1 EBADF (Bad file descriptor)
close(185) = -1 EBADF (Bad file descriptor)
close(186) = -1 EBADF (Bad file descriptor)
close(187) = -1 EBADF (Bad file descriptor)
close(188) = -1 EBADF (Bad file descriptor)
close(189) = -1 EBADF (Bad file descriptor)
close(190) = -1 EBADF (Bad file descriptor)
close(191) = -1 EBADF (Bad file descriptor)
close(192) = -1 EBADF (Bad file descriptor)
close(193) = -1 EBADF (Bad file descriptor)
close(194) = -1 EBADF (Bad file descriptor)
close(195) = -1 EBADF (Bad file descriptor)
close(196) = -1 EBADF (Bad file descriptor)
close(197) = -1 EBADF (Bad file descriptor)
close(198) = -1 EBADF (Bad file descriptor)
close(199) = -1 EBADF (Bad file descriptor)
close(200) = -1 EBADF (Bad file descriptor)
close(201) = -1 EBADF (Bad file descriptor)
close(202) = -1 EBADF (Bad file descriptor)
close(203) = -1 EBADF (Bad file descriptor)
close(204) = -1 EBADF (Bad file descriptor)
close(205) = -1 EBADF (Bad file descriptor)
close(206) = -1 EBADF (Bad file descriptor)
close(207) = -1 EBADF (Bad file descriptor)
close(208) = -1 EBADF (Bad file descriptor)
close(209) = -1 EBADF (Bad file descriptor)
close(210) = -1 EBADF (Bad file descriptor)
close(211) = -1 EBADF (Bad file descriptor)
close(212) = -1 EBADF (Bad file descriptor)
close(213) = -1 EBADF (Bad file descriptor)
close(214) = -1 EBADF (Bad file descriptor)
close(215) = -1 EBADF (Bad file descriptor)
close(216) = -1 EBADF (Bad file descriptor)
close(217) = -1 EBADF (Bad file descriptor)
close(218) = -1 EBADF (Bad file descriptor)
close(219) = -1 EBADF (Bad file descriptor)
close(220) = -1 EBADF (Bad file descriptor)
close(221) = -1 EBADF (Bad file descriptor)
close(222) = -1 EBADF (Bad file descriptor)
close(223) = -1 EBADF (Bad file descriptor)
close(224) = -1 EBADF (Bad file descriptor)
close(225) = -1 EBADF (Bad file descriptor)
close(226) = -1 EBADF (Bad file descriptor)
close(227) = -1 EBADF (Bad file descriptor)
close(228) = -1 EBADF (Bad file descriptor)
close(229) = -1 EBADF (Bad file descriptor)
close(230) = -1 EBADF (Bad file descriptor)
close(231) = -1 EBADF (Bad file descriptor)
close(232) = -1 EBADF (Bad file descriptor)
close(233) = -1 EBADF (Bad file descriptor)
close(234) = -1 EBADF (Bad file descriptor)
close(235) = -1 EBADF (Bad file descriptor)
close(236) = -1 EBADF (Bad file descriptor)
close(237) = -1 EBADF (Bad file descriptor)
close(238) = -1 EBADF (Bad file descriptor)
close(239) = -1 EBADF (Bad file descriptor)
close(240) = -1 EBADF (Bad file descriptor)
close(241) = -1 EBADF (Bad file descriptor)
close(242) = -1 EBADF (Bad file descriptor)
close(243) = -1 EBADF (Bad file descriptor)
close(244) = -1 EBADF (Bad file descriptor)
close(245) = -1 EBADF (Bad file descriptor)
close(246) = -1 EBADF (Bad file descriptor)
close(247) = -1 EBADF (Bad file descriptor)
close(248) = -1 EBADF (Bad file descriptor)
close(249) = -1 EBADF (Bad file descriptor)
rt_sigprocmask(SIG_SETMASK, [RTMIN], NULL, 8) = 0
rt_sigaction(SIGTERM, {0x400267a0, [], 0}, NULL, 8) = 0
rt_sigaction(SIGINT, {0x400267a0, [], 0}, NULL, 8) = 0
rt_sigaction(SIGUSR1, {0x400267a0, [], SA_RESTART}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [INT USR1 TERM], NULL, 8) = 0
open("/dev/hwrng", O_RDONLY) = 3
rt_sigaction(SIGALRM, {0x400267a0, [], 0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [ALRM], NULL, 8) = 0
alarm(10) = 0
read(3, 0xbfb50380, 4) = ? ERESTARTSYS (To be restarted)
--- SIGALRM (Alarm clock) @ 0 (0) ---
sigreturn() = ? (mask now [RTMIN])
exit_group(1) = ?
>>> Jeff Dike <jdike@addtoit.com> 06/01/05 10:37AM >>>
On Wed, Jun 01, 2005 at 10:09:50AM -0700, Anthony Brock wrote:
> I'm now running two systems with Jeff's patches for pulling entropy
> from the host's /dev/random. The first host I boot comes up fine
> (successfully loads rngd). However, the second fails to load rngd. I
> 'm getting back a return code of '1' from the daemon (the rng-source
> is misbehaving) after a pause of 10 seconds. Any ideas?
strace it?
Jeff
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^ permalink raw reply [flat|nested] 6+ messages in thread[parent not found: <s29d94d2.052@ORANGE.OUS.EDU>]
* Re: [uml-devel] Problem with /dev/random and rngd daemon
[not found] <s29d94d2.052@ORANGE.OUS.EDU>
@ 2005-06-01 20:29 ` Jeff Dike
0 siblings, 0 replies; 6+ messages in thread
From: Jeff Dike @ 2005-06-01 20:29 UTC (permalink / raw)
To: Anthony Brock; +Cc: user-mode-linux-devel
On Wed, Jun 01, 2005 at 10:57:59AM -0700, Anthony Brock wrote:
> I'm wondering if the first host to launch is exhausting the entropy
> pool and the second host is attempting to read from an empty pool.
The strace would seem to bear this out:
> open("/dev/hwrng", O_RDONLY) = 3
> rt_sigaction(SIGALRM, {0x400267a0, [], 0}, NULL, 8) = 0
> rt_sigprocmask(SIG_UNBLOCK, [ALRM], NULL, 8) = 0
> alarm(10) = 0
> read(3, 0xbfb50380, 4) = ? ERESTARTSYS (To be restarted)
> --- SIGALRM (Alarm clock) @ 0 (0) ---
> sigreturn() = ? (mask now [RTMIN])
> exit_group(1) = ?
This looks to me like "read from hwrng, but give up after 10 seconds
if nothing happens".
> If this is the case, then I have no idea how you could resolve this
> with multiple UML instances per host.
Can you read /dev/random on the host directly during this time? If
not, and you are out of entropy, I would say you need to find a source
of more of it.
Jeff
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [uml-devel] Problem with /dev/random and rngd daemon
@ 2005-06-01 17:09 Anthony Brock
2005-06-01 17:37 ` Jeff Dike
2005-06-01 18:25 ` Blaisorblade
0 siblings, 2 replies; 6+ messages in thread
From: Anthony Brock @ 2005-06-01 17:09 UTC (permalink / raw)
To: user-mode-linux-devel
I'm now running two systems with Jeff's patches for pulling entropy from the host's /dev/random. The first host I boot comes up fine (successfully loads rngd). However, the second fails to load rngd. I 'm getting back a return code of '1' from the daemon (the rng-source is misbehaving) after a pause of 10 seconds. Any ideas?
Tony
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [uml-devel] Problem with /dev/random and rngd daemon
2005-06-01 17:09 Anthony Brock
@ 2005-06-01 17:37 ` Jeff Dike
2005-06-01 18:25 ` Blaisorblade
1 sibling, 0 replies; 6+ messages in thread
From: Jeff Dike @ 2005-06-01 17:37 UTC (permalink / raw)
To: Anthony Brock; +Cc: user-mode-linux-devel
On Wed, Jun 01, 2005 at 10:09:50AM -0700, Anthony Brock wrote:
> I'm now running two systems with Jeff's patches for pulling entropy
> from the host's /dev/random. The first host I boot comes up fine
> (successfully loads rngd). However, the second fails to load rngd. I
> 'm getting back a return code of '1' from the daemon (the rng-source
> is misbehaving) after a pause of 10 seconds. Any ideas?
strace it?
Jeff
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [uml-devel] Problem with /dev/random and rngd daemon
2005-06-01 17:09 Anthony Brock
2005-06-01 17:37 ` Jeff Dike
@ 2005-06-01 18:25 ` Blaisorblade
2005-06-01 20:42 ` Jeff Dike
1 sibling, 1 reply; 6+ messages in thread
From: Blaisorblade @ 2005-06-01 18:25 UTC (permalink / raw)
To: user-mode-linux-devel; +Cc: Anthony Brock
On Wednesday 01 June 2005 19:09, Anthony Brock wrote:
> I'm now running two systems with Jeff's patches for pulling entropy from
> the host's /dev/random. The first host I boot comes up fine (successfully
> loads rngd). However, the second fails to load rngd. I 'm getting back a
> return code of '1' from the daemon (the rng-source is misbehaving) after a
> pause of 10 seconds. Any ideas?
Maybe the host /dev/random supports only one user at any given moment.
--
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade
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2005-06-01 17:57 [uml-devel] Problem with /dev/random and rngd daemon Anthony Brock
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2005-06-01 20:29 ` Jeff Dike
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2005-06-01 17:09 Anthony Brock
2005-06-01 17:37 ` Jeff Dike
2005-06-01 18:25 ` Blaisorblade
2005-06-01 20:42 ` Jeff Dike
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