Re: [PATCH 3/4] mm: Gather more PFNs before sending a TLB to flush unmapped pages

[Rik van Riel]

On 04/16/2015 06:22 AM, Mel Gorman wrote:
> The patch "mm: Send a single IPI to TLB flush multiple pages when unmapping"
> would batch 32 pages before sending an IPI. This patch increases the size of
> the data structure to hold a pages worth of PFNs before sending an IPI. This
> is a trade-off between memory usage and reducing IPIS sent. In the ideal
> case where multiple processes are reading large mapped files, this patch
> reduces interrupts/second from roughly 180K per second to 60K per second.
> 
> Signed-off-by: Mel Gorman <mgorman@xxxxxxx>

Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/