comp.os.linux.development.system Google Group

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Re: How to find the kernel patch level that has a specific patch?

rweiku...@mssgmbh.com (Rainer Weikusat) — Wed, 17 Mar 2010 13:06:30 UT

[...]
To none. It a Tcl/Tk application, something which is stated in the
third sentence of the corresponding manpage. I am afraid to inform you
that the Google-people who told you that Google invented 'GUI
application programming' in order to sell you into Google-services
have lied to you. As the saying goes: 'there is a sucker born every

Re: How to find the kernel patch level that has a specific patch?

yong...@yahoo.com (Yong Huang) — Tue, 16 Mar 2010 21:25:37 UT

Tilman,
Could you do me a favor by checking what URL your gitk browser
connects to? Maybe `netstat -anp | grep <gikt pid>', or `strace -e
trace=network gitk' can offer a clue. Thank you very much.
Yong Huang

Re: How to study debugger internals

tauno.voi...@notused.fi.invalid (Tauno Voipio) — Sat, 13 Mar 2010 16:49:28 UT

Have you looked at the information at
<[link]> ?
Please be warned that GDB is a pretty large and
complex program,

How to study debugger internals

ripunjay.tripa...@gmail.com (Ripunjay Tripathi) — Sat, 13 Mar 2010 15:41:22 UT

Excuse me if the post is NOT in scope of the community.
Want to study debuggers internals. Though I understand that they are
very much platform dependent, knowledge of internals for gdb and dbx
(for Intel/ARM) I believe should give me good understanding.
Please help me by telling the best way and if possible few links for

Re: semaphore, task control block, and kernel

d...@cowlark.com (David Given) — Fri, 12 Mar 2010 21:04:46 UT

Such information does exist but only the kernel needs to know about it.
So it's all stored in the kernel data structures, not in user space.
[...]
Hey, I've been looking into this!
The answer is: it depends. Linux, for example, uses a low-level
lightweight synchronisation primitive called a futex. The glibc pthreads

Re: message passing: blocking non blocking

dav...@webmaster.com (David Schwartz) — Fri, 12 Mar 2010 20:57:42 UT

That is likely incorrect. The correct definition of a blocking send is
"the sending process blocks until the message is 'sent', whatever that
means in context".
No idea, that seems confusing.
The point is this: either the implementation can take the data
immediately (such that the application no longer needs to do anything

message passing: blocking non blocking

xu_feng...@yahoo.com (feng) — Fri, 12 Mar 2010 20:07:27 UT

Hi,
i am confused about the definition of blocking, non blocking send and
receive operations with message passing. I have the definitions of the
textbook but it not that clear for me. let's exclude the case of
mailbox,. what do we really mean by blocking send? onereference says:
the sending process is blocked until the message is received . is that

semaphore, task control block, and kernel

xu_feng...@yahoo.com (feng) — Fri, 12 Mar 2010 20:06:37 UT

Hi,
It seems each semaphore has an internal queue of task control blocks
which correspond to the tasks waiting for the semaphore, obviously.
However, I thought since a multithreaded process might have many
semaphores, their locations / IDs should be stored in the main process
control block. I have not found any (see, [link]).

Re: Futex documentation

d...@cowlark.com (David Given) — Fri, 12 Mar 2010 00:32:37 UT

[...]
For some bizarre reason that had never occurred to me, so, er, thanks.
But I *still* can't find anything resembling an actual spec for the
syscall API, but now I'm pretty much convinced no such thing exists.
Mailing list postings and tutorial articles are all very well, but
they're neither timely nor comprehensive --- I have no way of knowing

Re: objdump with detached symbols

d...@cowlark.com (David Given) — Fri, 12 Mar 2010 00:11:23 UT

[...]
I'm trying to debug a third-party ELF loader that is somehow getting
something wrong in such a way that it's confusing ld-linux.so. I've
tried building it myself, but the glibc build system is hairy at the
best of times, and the rtld specific build rules are even hairier ---
I'm not confident of my ability to produce a binary with debug

Re: objdump with detached symbols

pac...@kosh.dhis.org (Alan Curry) — Thu, 11 Mar 2010 23:08:24 UT

In article <gk2m67-ujt....@marcumbill.bel lsouth.net>,
[...]
I think you've missed the point. Maybe you were temporarily blinded by that
obnoxious signature.
Anyway, the question was referring to the .gnu_debuglink feature, which
seems to be not quite working with objdump. The debugging symbols are
present in /usr/lib/debug

Re: root can't ls(1) a directory: Permission denied

j.deboynepollard-newsgro...@ntlworld.com (Jonathan de Boyne Pollard) — Thu, 11 Mar 2010 11:56:18 UT

People who have used NFS have known that this can happen for the past
two decades and more. (-:
Go and read the kernel documentation for the FUSE filesystem, paying
particular attention to its discussion of non-privileged mounts.

Re: Futex documentation

j.deboynepollard-newsgro...@ntlworld.com (Jonathan de Boyne Pollard) — Thu, 11 Mar 2010 00:12:06 UT

Google-fu on the blink? Try searching for these names. They are, after
all, the things that you want to find out about. (-: