Oh, that's my fault, I forgot that iov can be chained.
I should use 'pos + count' instead.
Thanks for pointing it out.
Qu.
-------- Original Message --------
Subject: [RFC] odd thing in btrfs_file_aio_write()
From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
To: Chris Mason <clm@xxxxxx>
Date: 2014年04月14日 08:26
end_pos = round_up(pos + iov->iov_len, root->sectorsize);
added in commit 3ac0d7b96a268a98bd474cab8bce3a9f125aaccf
Author: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx>
Date: Thu Mar 27 02:51:58 2014 +0000
btrfs: Change the expanding write sequence to fix snapshot related bug.
doesn't look right - after all, just split the first iovec in the array
and end_pos will go down. Do we want pos + count instead of
pos + iov->iov_len there?
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