linux-ext4 - Re: [PATCH 1/1] Extent overlap bugfix in ext4

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Message-ID: <m3hcv7f6r2.fsf@bzzz.home.net>
Date:	Thu, 04 Jan 2007 13:04:01 +0300
From:	Alex Tomas <alex@...sterfs.com>
To:	Mingming Cao <cmm@...ibm.com>
Cc:	Alex Tomas <alex@...sterfs.com>,
	"Amit K. Arora" <aarora@...ux.vnet.ibm.com>,
	linux-ext4@...r.kernel.org, suparna@...ibm.com
Subject: Re: [PATCH 1/1] Extent overlap bugfix in ext4

>>>>> Mingming Cao (MC) writes:

 MC> But the bug Amit pointed here is unrelated to the code convert
 MC> uninitialized blocks to initialized ones. Rather, it's related to do
 MC> multiple block allocation across on a window with parts already have
 MC> blocks allocated. Without the check, the current code just simply
 MC> allocate the requested extent and insert it into the tree which might
 MC> overlap with existing extent.

correct. thanks for catching. in delayed allocation patch
get_blocks() isn't used and ext4_ext_walk_space() works
right in this case.

thanks, Alex
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