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commit 86ed41792d394f804d2c9e695ac8b257220fbdee
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Author: Victor Stinner <vstinner@redhat.com>
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Date: Tue Mar 12 17:17:13 2019 +0100
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Fix test_tarfile on ppc64
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Fix sparse file tests of test_tarfile on ppc64le with the tmpfs
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filesystem.
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* https://bugzilla.redhat.com/show_bug.cgi?id=1639490
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* https://bugs.python.org/issue35772
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* https://github.com/python/cpython/commit/d1dd6be613381b996b9071443ef081de8e5f3aff
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diff --git a/Lib/test/test_tarfile.py b/Lib/test/test_tarfile.py
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index 4cd7d53..bd8b05f 100644
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--- a/Lib/test/test_tarfile.py
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+++ b/Lib/test/test_tarfile.py
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@@ -973,16 +973,21 @@ class GNUReadTest(LongnameTest, ReadTest, unittest.TestCase):
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def _fs_supports_holes():
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# Return True if the platform knows the st_blocks stat attribute and
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# uses st_blocks units of 512 bytes, and if the filesystem is able to
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- # store holes in files.
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+ # store holes of 4 KiB in files.
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+ #
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+ # The function returns False if page size is larger than 4 KiB.
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+ # For example, ppc64 uses pages of 64 KiB.
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if sys.platform.startswith("linux"):
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# Linux evidentially has 512 byte st_blocks units.
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name = os.path.join(TEMPDIR, "sparse-test")
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with open(name, "wb") as fobj:
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+ # Seek to "punch a hole" of 4 KiB
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fobj.seek(4096)
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+ fobj.write(b'x' * 4096)
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fobj.truncate()
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s = os.stat(name)
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support.unlink(name)
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- return s.st_blocks == 0
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+ return (s.st_blocks * 512 < s.st_size)
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else:
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return False
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