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authorhttps://me.yahoo.com/a/g3Ccalpj0NhN566pHbUl6i9QF0QEkrhlfPM-#b1c14 <diana@web>2015-02-16 20:08:03 +0100
committerGNU Hurd web pages engine <web-hurd@gnu.org>2015-02-16 20:08:03 +0100
commit95878586ec7611791f4001a4ee17abf943fae3c1 (patch)
tree847cf658ab3c3208a296202194b16a6550b243cf /open_issues/ext2fs_deadlock.mdwn
parent8063426bf7848411b0ef3626d57be8cb4826715e (diff)
rename open_issues.mdwn to service_solahart_jakarta_selatan__082122541663.mdwn
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-[[!meta copyright="Copyright © 2010, 2012 Free Software Foundation, Inc."]]
-
-[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
-id="license" text="Permission is granted to copy, distribute and/or modify this
-document under the terms of the GNU Free Documentation License, Version 1.2 or
-any later version published by the Free Software Foundation; with no Invariant
-Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
-is included in the section entitled [[GNU Free Documentation
-License|/fdl]]."]]"""]]
-
-[[!tag open_issue_hurd]]
-
-On 2010-10-26, [[I|tschwinge]]'ve been doing the following: `cp -a
-../tmpdir/dump*.o ./` (65 files), changed my mind, hit `C-c`, continued with
-`cp -a ../tmpdir/dump*.o ./` (to preserve timestamps), wondered why this takes
-so long, hit `C-c` again, then found the FS deadlocked (using no CPU; but
-`syncfs -s -c` wouldn't finish, for example). Judging from the files'
-timestamps (after rebooting and `fsck`), I would assume that it already hung at
-the second `cp`'s time, and the deadlock thus is not due to the second `C-c`,
-but due to the first one.
-
- # gdb /hurd/ext2fs
- [...]
- (gdb) set noninvasive on
- (gdb) attach 177
- [...]
- [New Thread 177.535]
- Reading symbols [...]
- (gdb) info threads
- [all the same from 177.535 down to...]
- 11 Thread 177.11 0x010e3efc in mach_msg_trap ()
- at /build/buildd-eglibc_2.11.2-6+b1-hurd-i386-sWVQAp/eglibc-2.11.2/build-tree/hurd-i386-libc/mach/mach_msg_trap.S:2
- 10 Thread 177.10 0x010e3efc in mach_msg_trap ()
- at /build/buildd-eglibc_2.11.2-6+b1-hurd-i386-sWVQAp/eglibc-2.11.2/build-tree/hurd-i386-libc/mach/mach_msg_trap.S:2
- [doesn't continue with thread 9, but hangs, taking all CPU time]
-
-New GDB instance, again noninvasive, I'm able to continue.
-
-Here are backtraces for threads [[1 to 8|bt_1-8]] and [[10 to 535|bt_10-535]],
-I didn't succeed to get any information about thread 9 (which thus would
-probably be the most interesting one...) -- GDB would always hang when
-accessing it, no matter whether noninvasive mode or not. (Didn't have time to
-pull the information out of the process' memory manually (how to do that,
-anyways?), and also didn't have time to continue with debugging GDB itself, but
-this sounds like a [[!taglink open_issue_gdb]]...)
-
-
-# IRC, freenode, #hurd, 2010-10-27
-
- <youpi> thread 8 hung on ports_begin_rpc
- <youpi> that's probably where one could investigated first
- <youpi> yes, a lot of threads are hung on that
- <tschwinge> You mean 0x10b9488, right?
- <youpi> yes