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Red Hat Bugzilla – Attachment 146255 Details for
Bug 223491
virt-install does not use O_DIRECT for creating non-sparse files, so it fills the pagecache
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[patch]
Make virt-install use a dd with O_DIRECT to avoid filling the page cache
python-virtinst-dd-odirect.patch (text/plain), 788 bytes, created by
Chris Lalancette
on 2007-01-22 23:36:48 UTC
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Description:
Make virt-install use a dd with O_DIRECT to avoid filling the page cache
Filename:
MIME Type:
Creator:
Chris Lalancette
Created:
2007-01-22 23:36:48 UTC
Size:
788 bytes
patch
obsolete
>--- virtinst-0.99.0/virtinst/XenGuest.py.orig 2007-01-22 11:06:18.000000000 -0500 >+++ virtinst-0.99.0/virtinst/XenGuest.py 2007-01-22 11:08:03.000000000 -0500 >@@ -95,9 +95,10 @@ class XenDisk: > os.lseek(fd, off, 0) > os.write(fd, '\x00') > else: >- buf = '\x00' * 1024 * 1024 # 1 meg of nulls >- for i in range(0, long(self.size * 1024L)): >- os.write(fd, buf) >+ os.system("dd if=/dev/zero of=%s oflag=direct bs=1M count=%d" % ( self.path, long(self.size * 1024L) ) ) >+# buf = '\xff' * 1024 * 1024 # 1 meg of nulls >+# for i in range(0, long(self.size * 1024L)): >+# os.write(fd, buf) > os.close(fd) > # FIXME: set selinux context? >
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