report at bugs
Jun 1, 2008, 7:24 PM
Post #1 of 6
(378 views)
Permalink
|
|
[issue3026] mmap broken with large files on 64bit system
|
|
New submission from Matthew Mueller <donut [at] users>:
mmap on large files on 64 bit platforms in python >=2.5 returns some
sort of garbage. In 2.4 it would just throw an exception. Now I get
something like this (script runs md5.md5 on mmap object, and then runs
os.system md5sum for comparison):
This is python2.5 from Ubuntu 8.04 AMD64
/tmp$ python2.5 testbigfile.py
python mmap md5: 1230552d39b7c1751f86bae5205ec0c8
abe59e28c9a3f11b883f62c80a3833a5 *bigfile
This is python svn as of 20080601, compiled the on same system.
/tmp$ python2.6 testbigfile.py
testbigfile.py:5: DeprecationWarning: the md5 module is deprecated; use
hashlib instead
import md5
python mmap md5: 1230552d39b7c1751f86bae5205ec0c8
abe59e28c9a3f11b883f62c80a3833a5 *bigfile
Also note how the python md5 call returns immediately, not something you
would expect when md5ing 4GB of data.
----------
components: Extension Modules
files: testbigfile.py
messages: 67623
nosy: donut
severity: normal
status: open
title: mmap broken with large files on 64bit system
type: behavior
versions: Python 2.6
Added file: http://bugs.python.org/file10500/testbigfile.py
_______________________________________
Python tracker <report [at] bugs>
<http://bugs.python.org/issue3026>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/list-python-bugs%40lists.gossamer-threads.com
|
