________________________________
发件人: Dan Williams <[email protected]>
发送时间: 2019年4月13日 0:32
收件人: Li,Rongqing
抄送: linux-nvdimm
主题: Re: [PATCH][RFC] nvdimm: pmem: always flush nvdimm for write request
>--- a/drivers/nvdimm/pmem.c
>+++ b/drivers/nvdimm/pmem.c
>@@ -217,6 +217,8 @@ static blk_qc_t pmem_make_request(struct
>request_queue *q, struct bio *bio)
>
> if (bio->bi_opf & REQ_FUA)
> nvdimm_flush(nd_region);
>+ else if (op_is_write(bio_op(bio)))
>+ wmb();
Test shows this change have no performance improvement
-RongQing
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