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NFSD: Batch release pages during splice read
Large splice reads call put_page() repeatedly. put_page() is relatively expensive to call, so replace it with the new svc_rqst_replace_page() helper to help amortize that cost. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: NeilBrown <neilb@suse.de>
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1 changed files with 2 additions and 7 deletions
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@ -849,15 +849,10 @@ nfsd_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
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struct page *page = buf->page;
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struct page *page = buf->page;
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if (rqstp->rq_res.page_len == 0) {
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if (rqstp->rq_res.page_len == 0) {
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get_page(page);
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svc_rqst_replace_page(rqstp, page);
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put_page(*rqstp->rq_next_page);
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*(rqstp->rq_next_page++) = page;
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rqstp->rq_res.page_base = buf->offset;
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rqstp->rq_res.page_base = buf->offset;
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} else if (page != pp[-1]) {
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} else if (page != pp[-1]) {
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get_page(page);
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svc_rqst_replace_page(rqstp, page);
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if (*rqstp->rq_next_page)
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put_page(*rqstp->rq_next_page);
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*(rqstp->rq_next_page++) = page;
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}
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}
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rqstp->rq_res.page_len += sd->len;
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rqstp->rq_res.page_len += sd->len;
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