#2063: Breackage on OpenBSD due to mmap remap
----------------------------+-----------------------------------------------
Reporter: dons | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 6.10.2
Component: Runtime System | Version: 6.8.2
Severity: normal | Resolution:
Keywords: OpenBSD | Difficulty: Moderate (1 day)
Testcase: | Architecture: x86_64 (amd64)
Os: OpenBSD |
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Comment (by simonmar):
I've pushed the following speculative fix for this and #2512:
{{{
Mon Nov 17 04:05:56 PST 2008 Simon Marlow <[EMAIL PROTECTED]>
* Attempt to fix #2512 and #2063; add +RTS -xm<address> -RTS option
On x86_64, the RTS needs to allocate memory in the low 2Gb of the
address space. On Linux we can do this with MAP_32BIT, but sometimes
this doesn't work (#2512) and other OSs don't support it at all
(#2063). So to work around this:
- Try MAP_32BIT first, if available.
- Otherwise, try allocating memory from a fixed address (by default
1Gb)
- We now provide an option to configure the address to allocate
from. This allows a workaround on machines where the default
breaks, and also provides a way for people to test workarounds
that we can incorporate in future releases.
}}}
We need help to test this, from folks running *BSD on x86_64, and also Xen
on x86_64. Igloo: please merge, then keep the bug open for testing.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2063#comment:9>
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