Review request for 5049299
aph at redhat.com
Fri May 29 08:54:48 UTC 2009
Florian Weimer wrote:
> * Andrew Haley:
>> However, I think you don't want PROT_NONE whan a system has been configured
>> with mode 2: in that case, a user has a reasonable expectation that
>> they can use all of the memory they allocated at VM startup. It makes
>> more sense to allocate all the -Xms size immediately.
> -Xms? Or -Xmx?
-Xms as a minimum: the user has a entitlement to that. It's not unreasonable
that later heap expansion might fail.
> The latter leads to problems if the maximum heap size is relatively large.
> Currently, -Xmx is reserved, and some software fails to build on
> vm.overcommit_memory systems due to this.
I don't get it. Why would overcommit cause some software to fail to
build? I can understand it failing if overcommit was turned off.
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