Bug 13603

Summary:	Fallocate and DirectIO
Product:	File System	Reporter:	Aneesh Kumar K.V (aneesh.kumar)
Component:	ext4	Assignee:	fs_ext4 (fs_ext4)
Status:	RESOLVED CODE_FIX
Severity:	normal	CC:	sandeen
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:		Subsystem:
Regression:	No	Bisected commit-id:

Description Aneesh Kumar K.V 2009-06-22 16:47:18 UTC

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

Comment 1 Eric Sandeen 2010-03-04 17:32:57 UTC

This is all fixed with mingming's patches now, right?

Comment 2 Aneesh Kumar K.V 2010-03-06 08:45:54 UTC

yes ,with the changes from mingming  we should be able to close the bug