Messages in this thread | | | Date | Tue, 04 Nov 2008 09:56:37 -0600 | From | "Chris Friesen" <> | Subject | Re: mmap: is default non-populating behavior stable? |
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Rik van Riel wrote: > Peter Zijlstra wrote:
>> The exact interaction of mmap() and truncate() I'm not exactly clear on. > > Truncate will reduce the size of the mmaps on the file to > match the new file size, so processes accessing beyond the > end of file will get a segmentation fault (SIGSEGV).
I suspect Peter was talking about using truncate() to set the initial file size, effectively increasing rather than reducing it.
Chris
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