Eric Frazier wrote: > Hi, > > This may be totaly ignorate crap, but I noticed this when I was reading the > ps man page on BSD 4.5 about sys/proc.h flags > > This one I noticed.. > > P_SYSTEM 0x00200 System proc: no sigs, stats or swapping > > > Could this mean what I think it means? That a process with this flag set, > won't be swaped out??
I've spent some time with our friend google and here is what I came up with (it's hard to search for things which can be called in many different ways): I've searched for P_SYSTEM and it seems that it's a *BSD thing and also when you set it you don't get sigs delivered. e.g. see the discussion here: http://mail-index.netbsd.org/tech-kern/1998/09/08/0004.html There is also: madvise(2) - give advice about use of memory Has anybody tried to use it? Can this help? There is some discussion here: http://lists.insecure.org/linux-kernel/2001/Oct/0877.html Here is another observation and explanation of the swapping/mem unsharing phenomena on linux. http://www.uwsg.iu.edu/hypermail/linux/kernel/0110.3/0324.html http://www.uwsg.iu.edu/hypermail/linux/kernel/0110.3/0307.html Finally, apparently it's relatively easy to patch the linux kernel to enabling mlock for non-root processes: http://www.uwsg.iu.edu/hypermail/linux/kernel/9608.2/0280.html > At 03:55 PM 3/12/02 +0100, Elizabeth Mattijsen wrote: > >>Oops. Premature sending... >> >>I have two ideas that might help: >>- reduce number of global variables used, less memory pollution by lexicals >>- make sure that you have the most up-to-date (kernel) version of your >>OS. Newer Linux kernels seem to be a lot savvy at handling shared memory >>than older kernels. >> >>Again, I wish you strength in fixing this problem... >> >> >>Elizabeth Mattijsen >> >> > > http://www.kwinternet.com/eric > (250) 655 - 9513 (PST Time Zone) > > > -- _____________________________________________________________________ Stas Bekman JAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide http://perl.apache.org/guide mailto:[EMAIL PROTECTED] http://ticketmaster.com http://apacheweek.com http://singlesheaven.com http://perl.apache.org http://perlmonth.com/
