[Bugme-new] [Bug 13603] New: Fallocate and DirectIO
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Mon Jun 22 09:47:18 PDT 2009
http://bugzilla.kernel.org/show_bug.cgi?id=13603
Summary: Fallocate and DirectIO
Product: File System
Version: 2.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ext4
AssignedTo: fs_ext4 at kernel-bugs.osdl.org
ReportedBy: aneesh.kumar at linux.vnet.ibm.com
Regression: No
Have a kernel.org bugzilla entry to track the bug.
http://article.gmane.org/gmane.comp.file-systems.ext4/13762
I noticed yesterday that a write to fallocate
space via directIO results in fallback to buffer_IO. ie the userspace
pages get copied to the page cache and then call a sync.
I guess this defeat the purpose of using directIO. May be we should
consider this a high priority bug.
-aneesh
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