[Ocfs2-devel] [PATCH 2/4] ocfs2: use allocation reservations during file write
Tao Ma
tao.ma at oracle.com
Tue Mar 16 02:19:25 PDT 2010
Hi Mark,
Mark Fasheh wrote:
> Add a per-inode reservations structure and pass it through to the
> reservations code.
>
> Signed-off-by: Mark Fasheh <mfasheh at suse.com>
> ---
> fs/ocfs2/alloc.c | 2 ++
> fs/ocfs2/aops.c | 2 ++
> fs/ocfs2/file.c | 3 +++
> fs/ocfs2/inode.c | 4 ++++
> fs/ocfs2/inode.h | 2 ++
> fs/ocfs2/super.c | 2 ++
> 6 files changed, 15 insertions(+), 0 deletions(-)
<snip>
>
> diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
> index 7e9df11..137d460 100644
> --- a/fs/ocfs2/aops.c
> +++ b/fs/ocfs2/aops.c
> @@ -1734,6 +1734,8 @@ int ocfs2_write_begin_nolock(struct address_space *mapping,
> goto out;
> }
>
> + data_ac->ac_resv = &OCFS2_I(inode)->ip_la_data_resv;
> +
Here is a bug. In case, we are writing the unwritten extents, we don't
have a valid data_ac.
> credits = ocfs2_calc_extend_credits(inode->i_sb,
> &di->id2.i_list,
> clusters_to_alloc);
Regards,
Tao
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