[Webkit-unassigned] [Bug 118733] New: Javascript JIT still allocates 2GB of memory on x86-64 Linux
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Tue Jul 16 07:44:55 PDT 2013
https://bugs.webkit.org/show_bug.cgi?id=118733
Summary: Javascript JIT still allocates 2GB of memory on x86-64
Linux
Product: WebKit
Version: 528+ (Nightly build)
Platform: Unspecified
OS/Version: Unspecified
Status: UNCONFIRMED
Severity: Normal
Priority: P2
Component: JavaScriptCore
AssignedTo: webkit-unassigned at lists.webkit.org
ReportedBy: edwin+webkit at etorok.net
Created an attachment (id=206778)
--> (https://bugs.webkit.org/attachment.cgi?id=206778&action=review)
Use MAP_32BIT
See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=712387 for the original bugreport.
Currently the javascript JIT allocates 2GB on x86-64, to ensure that all jumps are within a 2GB range.
This causes problems without overcommit (or without a swapfile), even on a machine with 8GB of physical RAM.
Attached is a patch that uses MAP_32BIT, instead of the wasteful allocation of 2GB.
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