This is the mail archive of the cygwin mailing list for the Cygwin project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Setting SHMMAX in Cygwin


On Jul 26 02:20, Gene C. Ruzicka wrote:
> 
> > 
> > > Further comment: Uncovering this information was somewhat painful.
> > 
> > Didn't you read /usr/share/doc/Cygwin/cygserver.README and in turn
> > /etc/cygserver.conf in the first place?  The configuration file contains
> > the comment
> > 
> >   "kern.ipc.shmmaxpgs: Maximum pages available for XSI shared memory."
> > 
> > I thought that explains it.
> > 
> > 
> > Corinna
> > 
> You are correct that those files explain how to set shmmaxpgs, and
> I noticed that early on. The problem is that I wanted to set shmmax, NOT
> shmmaxpgs per se, but it seems that the only place that spells out the relationship 
> between the two parameters --- thereby suggesting the means to adjust shmmax ---
> is in function shminit, which is rather deeply embedded in the source code tree:
> file /usr/src/cygwin/winsup/cygserver/sysgv_shm.cc to be precise.

I've changed the text in cygserver.conf to this:

# kern.ipc.shmmaxpgs: Maximum pages available for XSI shared memory.
# Changing shmmaxpgs immediately affects setting SHMMAX.  The relation
# between shmmaxpgs and SHMMAX is:  SHMMAX = shmmaxpgs * getpagesize().
# Default: 8192, Min: 1, Max: 32767
#kern.ipc.shmmaxpgs 8192


HTH,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Co-Project Leader          mailto:cygwin@cygwin.com
Red Hat, Inc.

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]