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Date:	Wed, 17 Aug 2011 14:02:09 +0300
From:	Surbhi Palande <>
Cc:	Jan Kara <>, Ted Tso <>
Subject: ext4: delayed allocation support and mmap

Hi All,

Current ext4_page_mkwrite() implementation always allocates a block
through  ext4_get_block_write() or ext4_get_block().

Commit: 9ea7df534ed2a18157434a496a12cf073ca00c52 removed the calls to
write_begin() to avoid calling ext4_da_write_begin() as calling it
from here is racy.

So for now, in ext4: delayed allocation is not supported under an mmap call?

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