Messages in this thread |  | | Date | Mon, 6 Jan 2003 17:22:51 +0100 | From | Alex Riesen <> | Subject | Re: shmat problem |
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> Doug, thanks for the reply. I've set SHM_RND in the call and used > "__attribute__ ((aligned(4096)))" during the the declaration of variable > global01_ > (as shown below) such that it is aligned on a page boundary. I'm porting > code that was > written for a Unix system to Linux and the example shown below is how the > code is implemented on Unix.
on which exactly?
> The example included executed correctly on: > mandrake - ? (Can't remember, but it was an old version) > > but fails to work on: > redhat - 2.2.14-5.0 > debian - 2.2.9 > mandrake - 2.4.19-16mdk > > We are currently working on mandrake - kernel 2.4.19-16mdk.
You have to add SHM_REMAP to shmat flags (see definitions of SHM_ flags).
> > if ( (shmptr = shmat(shmid, &global01_, SHM_RND)) == (void *) -1) > printf("shmat error: %d %s\n",errno, strerror(errno)); > else
add SHM_REMAP.
-alex
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