Re: [PATCH 0/2 RFC v3] Livelock avoidance for data integrity writeback

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On Fri, Jun 04, 2010 at 08:47:09PM +0200, Jan Kara wrote:
> 
>   Hi,
> 
>   I've revived my patches to implement livelock avoidance for data integrity
> writes. Due to some concerns whether tagging of pages before writeout cannot
> be too costly to use for WB_SYNC_NONE mode (where we stop after nr_to_write
> pages) I've changed the patch to use page tagging only in WB_SYNC_ALL mode
> where we are sure that we write out all the tagged pages. Later, we can think
> about using tagging for livelock avoidance for WB_SYNC_NONE mode as well...

Hmm what concerns? Do you have any numbers?

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