9p: embed fcall in req to round down buffer allocs

'msize' is often a power of two, or at least page-aligned, so avoiding an overhead of two dozen bytes for each allocation will help the allocator do its work and reduce memory fragmentation. Link: http://lkml.kernel.org/r/[email protected] Suggested-by: Matthew Wilcox <[email protected]> Signed-off-by: Dominique Martinet <[email protected]> Reviewed-by: Greg Kurz <[email protected]> Acked-by: Jun Piao <[email protected]> Cc: Matthew Wilcox <[email protected]>
wangyan0507 · Sep 7, 2018 · 523adb6 · 523adb6
1 parent 6348b90
commit 523adb6
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Showing 6 changed files with 125 additions and 118 deletions.
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
@@ -95,8 +95,8 @@ struct p9_req_t {
 	int status;
 	int t_err;
 	wait_queue_head_t wq;
-	struct p9_fcall *tc;
-	struct p9_fcall *rc;
+	struct p9_fcall tc;
+	struct p9_fcall rc;
 	void *aux;
 	struct list_head req_list;
 };
@@ -230,6 +230,7 @@ int p9_client_mkdir_dotl(struct p9_fid *fid, const char *name, int mode,
 				kgid_t gid, struct p9_qid *);
 int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status);
 int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *fl);
+void p9_fcall_fini(struct p9_fcall *fc);
 struct p9_req_t *p9_tag_lookup(struct p9_client *, u16);
 void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status);