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Re: [PATCH 5/5] ext4: write support for preallocated blocks/extents

from [Pekka Enberg] [Permanent Link][Original]
To: "Amit K. Arora" <aarora@xxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH 5/5] ext4: write support for preallocated blocks/extents
From: "Pekka Enberg" <penberg@xxxxxxxxxxxxxx>
Date: Mon, 7 May 2007 15:40:26 +0300
Cc: torvalds@xxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx, suparna@xxxxxxxxxx, cmm@xxxxxxxxxx
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In-reply-to: <20070426181623.GE7209@amitarora.in.ibm.com>
References: <20070321120425.GA27273@amitarora.in.ibm.com> <20070329101010.7a2b8783.akpm@linux-foundation.org> <20070330071417.GI355@devserv.devel.redhat.com> <20070417125514.GA7574@amitarora.in.ibm.com> <20070418130600.GW5967@schatzie.adilger.int> <20070420135146.GA21352@amitarora.in.ibm.com> <20070420145918.GY355@devserv.devel.redhat.com> <20070424121632.GA10136@amitarora.in.ibm.com> <20070426175056.GA25321@amitarora.in.ibm.com> <20070426181623.GE7209@amitarora.in.ibm.com>
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On 4/26/07, Amit K. Arora <aarora@xxxxxxxxxxxxxxxxxx> wrote: 
 /*
+ * ext4_ext_try_to_merge:
+ * tries to merge the "ex" extent to the next extent in the tree.
+ * It always tries to merge towards right. If you want to merge towards
+ * left, pass "ex - 1" as argument instead of "ex".
+ * Returns 0 if the extents (ex and ex+1) were _not_ merged and returns
+ * 1 if they got merged.
+ */
+int ext4_ext_try_to_merge(struct inode *inode,
+                               struct ext4_ext_path *path,
+                               struct ext4_extent *ex)
+{


Please either use proper kerneldoc format or drop
"ext4_ext_try_to_merge" from the comment.


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