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

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'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/1533825236-22896-1-git-send-email-asmadeus@codewreck.org
Suggested-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Reviewed-by: Greg Kurz <groug@kaod.org>
Acked-by: Jun Piao <piaojun@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Dominique Martinet
2018-07-30 05:55:19 +00:00
parent 6348b903d7
commit 523adb6cc1
6 changed files with 125 additions and 118 deletions
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5
include/net/9p/client.h
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@@ -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);