Re: [PATCH 14/45] writeback: quit on wrap for .range_cyclic (afs)

[David Howells]

Wu Fengguang <fengguang.wu@xxxxxxxxx> wrote:

> Convert wbc.range_cyclic to new behavior: when past EOF, abort writeback
> of the inode, which instructs writeback_single_inode() to delay it for
> a while if necessary.
> 
> It removes one inefficient .range_cyclic IO pattern when writeback_index
> wraps:
> 	submit [10000-10100], (wrap), submit [0-100]
> In which the submitted pages may be consisted of two distant ranges.
> 
> It also prevents submitting pointless IO for busy overwriters.
> 
> CC: David Howells <dhowells@xxxxxxxxxx>
> Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>

Acked-by: David Howells <dhowells@xxxxxxxxxx>
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