On 01/21/2013 09:29 PM, Shaohua Li wrote:
When I use several fast SSD to do swap, swapper_space.tree_lock is heavily contended. This makes each swap partition have one address_space to reduce the lock contention. There is an array of address_space for swap. The swap entry type is the index to the array. In my test with 3 SSD, this increases the swapout throughput 20%. V1->V2: simplify code Signed-off-by: Shaohua Li <shli@xxxxxxxxxxxx>
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