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SubjectRe: Problem with 2.4.0-test9-pre6 seems to be SHM
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Mark Hahn wrote:
<blockquote TYPE=CITE>this has nothing to do with the linux kernel.
<br>X itself does not use shm for anything.&nbsp; apps may use
<br>an X extension (XSHM) which uses shm segments to exchange
<br>image data without copying through a socket, but that's
<br>an extension, not inherent to X.
<p>> Ok, compiling using a cvs of X i got a couple hours ago,&nbsp; I'm
just
<br>> wondering what the average segment number is for SHM on an X session
<br>> that has been up for a while ....&nbsp; i'll get back with any sort
of info
<br>> on if the SHM problem has been solved with this latest CVS or if
it
<br>> continues to look like a kernel SHM problem.&nbsp; So far though,
<br>> 2.4.0-test8-vm3 is handling the problem Quite well as opposed to
test9,
<br>> which died in 2 hours upon booting ...and it didn't have the added
<br>> stress of compiling X.
<br>>
<br>> -
<br><a href="http://java.mcmaster.ca/~hahn"></a>&nbsp;</blockquote>

<p><br>I think it has a lot to do with the kernel, and with X.&nbsp; Since
i havn't upgraded anything but X (and thus the extensions) ... now it's
obvious that X is at fault for providing us with a wonderful shared memory
leak.&nbsp; But, the kernel too, has something to do with it since test9
seems to be fairly unstable with it, causing all sorts of weird happenings
before totally freezing up like test8-vm3 does.&nbsp;&nbsp;&nbsp;&nbsp;
This problems only manifests in VERY&nbsp;recent X cvs copies so most people
will not see this problem.&nbsp; The problem i'm wondering about is if
the Kernel is handling shared memory correctly or if this is entirely X's
fault.
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