Re: [Patch] get db2 (finally) working again with shm fs

From: Christoph Rohland (cr@sap.com)
Date: Wed Jun 07 2000 - 03:16:35 EST


Christopher Zimmerman <zim@av.com> writes:

> hey Christoph
>
> I've tried this patch with ac9 and it doesn't seem to solve the
> problems I've been having. Basically I can cause any system running
> 2.4.0-test1+ to lock up without any messages to the console or log
> files. Right before the lockup one can still login, but ps halts at
> the process that's about to cause the lock up and top will not even
> run. If one tries to nicely shutdown the machine locks. The
> process in question is multithreaded and basically mmaps files
> read/shared and read/write/shared.
>
> Okay I just finished another test. This one takes a while to kill
> the box. Basically this program opens a 10GB file and has 100
> threads reading and writing to it. A mutex is used every time the
> file is accessed. Any help would be appreciated. :)

O.K. these problems are _not_ addressed by the patch. There was a
permission problem in shm which did show up under db2. The swap
problems are still pending. Sorry for that.

Does you test proggy use shm or plain files?

Greetings
                Christoph

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