[Webkit-unassigned] [Bug 65766] JIT still requires VM overcommit

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=65766


Gavin Barraclough <barraclough at apple.com> changed:

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--- Comment #1 from Gavin Barraclough <barraclough at apple.com>  2011-08-05 12:32:17 PST ---
I'm going to retitle this bug since "JIT still requires VM overcommit" is not a bug, this is by design. :o)

We need a mechanism to map VM space without reserving physical memory.  It sounds like MAP_NORESERVE should do exactly this, so my first question would be, why is this not working?  If the kernel is not obeying the MAP_NORESERVE flag, it seems there are two options:

(1) Make the kernel obey MAP_NORESERVE.
(2) Find an alternate interface that will allocate VM without reserving physical memory.

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