Hi,
I've scoured through the net and the mailing archives, but was unable to
find any satisfactory information on a certain problem I'm suffering at
the moment.
After getting the dreaded "shmget() failed" error message, I have since
tried several recompiles of the kernel to fix the problem.
I added
options SHMMAXPGS=16385
options SHMMAX=(SHMMAXPGS*PAGE_SIZE+1)
to my new kernel and recompiled.
However, under XFree86 4.0, I still seem to be getting shared memory
issues.
Compupic refuses to start under GNOME issuing
X Error of failed request: BadAccess (attempt to access private
resource denied)
Major opcode of failed request: 146 (MIT-SHM)
Minor opcode of failed request: 1 (X_ShmAttach)
Serial number of failed request: 2961
Current serial number in output stream: 2962
Yet works under VTWM - until I load up a few applications, when it
terminates again, with the same problem. More annoyingly, FXTV also dies
with the same problem.
Next, I tried another kernel, this time with the following options:
options SEMMNI=100
options SEMMNS=300
options SEMUME=100
options SEMMNU=150
options SHMMAXPGS=16385
I omitted the SHMMAX option, as I have read that this option is now
deprecated. Unfortunately, this kernel was not better.
I'm currently running FreeBSD 4.0-RELEASE.
Several questions;
1. If I upgrade to 4.1-STABLE (which I will be soon), will the shared
memory issue disappear?
2. I am not sure as to the exact options (and combination of options I
should be choosing). My computer has 384MB of RAM - I want to be able to
make *optimum* use of all that memory, and run X sessions with heavy
loads - can someone suggest the particular values I should be using?
3. ...and of course, how do I fix this? With the amount of RAM I've got,
getting memory issues is silly, so I would like to resolve this.
Finally, can anyone recommend any books/URLs on the SYSV shared memory
management? I'm curious to know more about the way different
applications utilize memory; most applications run perfectly; the GIMP
loads up in about 1 second.
Thanks,
John.
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