On Tue, Jan 21, 2014 at 04:02:26PM +0100, Alexander Gordeev wrote: > Scanning ata_port::qc_allocated bitmask for free tags has > been a performance bottleneck due to the cache line bouncing. > This update replaces ata_port::qc_allocated bitmask with > optimized for parallel access percpu_ida tags allocator.
Hi Tejun, There is a discussion about imperfect percpu_ida handling of low nr of tags. I think this change is too early to bring. Thanks! -- Regards, Alexander Gordeev agord...@redhat.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
