Review request (hs24): 8007074: SIGSEGV at ParMarkBitMap::verify_clear()

Florian Weimer fweimer at
Tue Jul 9 08:01:23 PDT 2013

On 07/09/2013 04:21 PM, Stefan Karlsson wrote:
> Note that we recently changed from using PROT_READ|PROT_WRITE to
> PROT_NONE when reserving memory in JDK8:

Very cool.  I can confirm that this change resolves the long-standing 
issue with the standard heap size (a quarter of RAM) and 
vm.overcommit_memory=2 mode.  Previously, you could not start more than 
3 VMs in parallel, and with the change, that limitation is lifted.

Any chance we can backport this change to hs24 and jdk7u?

Florian Weimer / Red Hat Product Security Team

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