linux-ext4 - Re: booked-page-flag.patch

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Message-ID: <m3hctm3588.fsf@bzzz.home.net>
Date:	Fri, 16 Feb 2007 10:56:55 +0300
From:	Alex Tomas <alex@...sterfs.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Alex Tomas <alex@...sterfs.com>, Eric Sandeen <sandeen@...hat.com>,
	"Theodore Ts'o" <tytso@....edu>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: booked-page-flag.patch

>>>>> Andrew Morton (AM) writes:

 AM> Well, one could just assume that the page has no disk mapping and go and
 AM> make the space reservation.  Things will work out OK when we come to do
 AM> writepage().

 AM> Or one could do both: call get_block() only if the page was inside i_size.

well, even so we need to reserve not that block ony, but
also needed metadata (for the worst case). probably this
is work for get_block or some different method? anyway,
we have to call it if the page is being written partial. 

thanks, Alex
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