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Diffstat (limited to 'open_issues/libpthread_assertion_thread_prevp.mdwn')
| -rw-r--r-- | open_issues/libpthread_assertion_thread_prevp.mdwn | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/open_issues/libpthread_assertion_thread_prevp.mdwn b/open_issues/libpthread_assertion_thread_prevp.mdwn deleted file mode 100644 index f93f07d6..00000000 --- a/open_issues/libpthread_assertion_thread_prevp.mdwn +++ /dev/null @@ -1,109 +0,0 @@ -[[!meta copyright="Copyright © 2011, 2013 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]]."]]"""]] - -[[!meta title="libpthread: __pthread_enqueue: Assertion `thread->prevp == 0' -failed"]] - -[[!tag open_issue_libpthread]] - - -# IRC, OFTC, #debian-hurd, 2011-10-21 - - [Python testsuite] - <pinotree> [169/340/1] test_logging - <pinotree> python: - /home/pino/sources/hurd/hurd-20110519/./libpthread/pthread/pt-internal.h:109: - __pthread_enqueue: Assertion `thread->prevp == 0' failed. - <pinotree> sigh - - -## IRC, freenode, #hurd, 2011-10-21 - - <pinotree> am i missing anything, or in libpthread the __pthread_threads - list does not ever has elements removed from it? - <pinotree> ... thus potentially causing - "./libpthread/pthread/pt-internal.h:109: __pthread_enqueue: Assertion - `thread->prevp == 0' failed." because threads can be appended on - __pthread_dealloc() to the __pthread_free_threads list as well? - <pinotree> maybe reusing the same next+prevp pointers in the __pthread - struct for more than one list at the same time isn't a good idea... - - -## IRC, freenode, #hurd, 2011-10-23 - - <youpi> pinotree: I don't understand the relation between thread->prevp != - 0 and the __pthread_threads list - <youpi> the list never has elements removed indeed, since libpthread never - frees __pthread structures apparently - <pinotree> youpi: ye sorry, that relation is indeed nonsense - <youpi> in which condition did you get prevp != 0 - <pinotree> i wa trying to find some explaination for the "thread->prevp == - 0" assertion in the _queue function - <youpi> ? - <pinotree> *was - <youpi> it's not obvious to me how libpthread makes sure the various - cond/mutex/rwlock make sure that it's not queued several times - <pinotree> yeah - <pinotree> apparently prevp/next are used for lists of held - waitcond/mutex/rwlock and free threads - - -# IRC, freenode, #hurd, 2013-03-20 - - <braunr> aw - <braunr> i hit the ext2fs.static: ./pthread/pt-internal.h:122: - __pthread_enqueue: Assertion `thread->prevp == 0' failed. - <braunr> assertion - <braunr> looks like there is a deadlock on assert - <braunr> which might explain why i never saw progress when i tested that in - the past - - -## IRC, freenode, #hurd, 2013-04-21 - - <braunr> damn, there still bugs in libpthread - <braunr> (about prevp not being null when it should i mean) - <pinotree> braunr: found another trigger for that? - <braunr> no - <braunr> it's so random i wonder if it's not a completely unrelated - corruption - <braunr> pinotree: also, i'm having more of these issues with my custom - hurd packages that let threads exit after some time from managing ports - <braunr> (i removed the libports_stability patch) - <braunr> i once had this : http://www.sceen.net/~rbraun/darnassus_crash.png - -[The assertion failure.] - - -## IRC, freenode, #hurd, 2013-04-23 - - <braunr> removing the libports_stability patch exposed bugs in libpthread, - triggering assertions when queueing/dequeue threads from a queue (but i - don't know which one / in which function) - - -## IRC, freenode, #hurd, 2013-06-25 - - <pinotree> braunr: - https://buildd.debian.org/status/fetch.php?pkg=libmemcached&ver=1.0.17-2&arch=hurd-i386&stamp=1372165732 - <pinotree> make: ./pthread/pt-internal.h:122: __pthread_enqueue: Assertion - `thread->prevp == 0' failed. \o/ - <pinotree> (it should rather be /o\, but better pretend not) - <braunr> pinotree: yes, we regularly see it - <braunr> pinotree: how long has the machine been running at this point ? - <pinotree> dunno, you should ask samuel about that - <pinotree> does it happen after N hours/days? - <braunr> a few days of moderate to high activity yes - <pinotree> ah ok - <braunr> and i actually see this error much more often when i disable the - libports stability patch in the hurd debian package - <braunr> so i guess something is wrong with thread recycling - <braunr> but i wanted to completely rewrite that part with the new kernel - call i asked bddebian to work on :) |