#include <linux/sunrpc/svcauth.h>
#include <linux/wait.h>
#include <linux/mm.h>
+#include <linux/pagevec.h>
/* statistics for svc_pool structures */
struct svc_pool_stats {
struct page * *rq_next_page; /* next reply page to use */
struct page * *rq_page_end; /* one past the last page */
+ struct pagevec rq_pvec;
struct kvec rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */
struct bio_vec rq_bvec[RPCSVC_MAXPAGES];
struct svc_pool *pool, int node);
struct svc_rqst *svc_prepare_thread(struct svc_serv *serv,
struct svc_pool *pool, int node);
+void svc_rqst_replace_page(struct svc_rqst *rqstp,
+ struct page *page);
void svc_rqst_free(struct svc_rqst *);
void svc_exit_thread(struct svc_rqst *);
unsigned int svc_pool_map_get(void);
}
EXPORT_SYMBOL_GPL(svc_set_num_threads_sync);
+/**
+ * svc_rqst_replace_page - Replace one page in rq_pages[]
+ * @rqstp: svc_rqst with pages to replace
+ * @page: replacement page
+ *
+ * When replacing a page in rq_pages, batch the release of the
+ * replaced pages to avoid hammering the page allocator.
+ */
+void svc_rqst_replace_page(struct svc_rqst *rqstp, struct page *page)
+{
+ if (*rqstp->rq_next_page) {
+ if (!pagevec_space(&rqstp->rq_pvec))
+ __pagevec_release(&rqstp->rq_pvec);
+ pagevec_add(&rqstp->rq_pvec, *rqstp->rq_next_page);
+ }
+
+ get_page(page);
+ *(rqstp->rq_next_page++) = page;
+}
+EXPORT_SYMBOL_GPL(svc_rqst_replace_page);
+
/*
* Called from a server thread as it's exiting. Caller must hold the "service
* mutex" for the service.
kfree(rqstp->rq_deferred);
rqstp->rq_deferred = NULL;
+ pagevec_release(&rqstp->rq_pvec);
svc_free_res_pages(rqstp);
rqstp->rq_res.page_len = 0;
rqstp->rq_res.page_base = 0;
struct xdr_buf *arg = &rqstp->rq_arg;
unsigned long pages, filled;
+ pagevec_init(&rqstp->rq_pvec);
+
pages = (serv->sv_max_mesg + 2 * PAGE_SIZE) >> PAGE_SHIFT;
if (pages > RPCSVC_MAXPAGES) {
pr_warn_once("svc: warning: pages=%lu > RPCSVC_MAXPAGES=%lu\n",