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SubjectRe: [PATCH 03/17] writeback: introduce writeback_control.inodes_cleaned
On Thu, May 12, 2011 at 09:57:09PM +0800, Wu Fengguang wrote:
> The flusher works on dirty inodes in batches, and may quit prematurely
> if the batch of inodes happen to be metadata-only dirtied: in this case
> wbc->nr_to_write won't be decreased at all, which stands for "no pages
> written" but also mis-interpreted as "no progress".
> So introduce writeback_control.inodes_cleaned to count the inodes get
> cleaned. A non-zero value means there are some progress on writeback,
> in which case more writeback can be tried.

Why introduce a new field for this? Just decrement nr_to_write for
every write_inode() call made in writeback_single_inode()....


Dave Chinner

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