diff options
| author |   NeilBrown <neilb@suse.de> | 2006-10-04 02:15:47 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-04 07:55:15 -0700 |
| commit | 3cc03b164cf01c6f36e64720b58610d292fb26f7 (patch) | |
| tree | b558e11a087945ad5b9a1a25483aa2acc8d93fbb /net/sunrpc/svcsock.c | |
| parent | [PATCH] knfsd: Replace two page lists in struct svc_rqst with one (diff) | |
| download | linux-dev-3cc03b164cf01c6f36e64720b58610d292fb26f7.tar.xz linux-dev-3cc03b164cf01c6f36e64720b58610d292fb26f7.zip | |
[PATCH] knfsd: Avoid excess stack usage in svc_tcp_recvfrom
.. by allocating the array of 'kvec' in 'struct svc_rqst'.
As we plan to increase RPCSVC_MAXPAGES from 8 upto 256, we can no longer
allocate an array of this size on the stack. So we allocate it in 'struct
svc_rqst'.
However svc_rqst contains (indirectly) an array of the same type and size
(actually several, but they are in a union). So rather than waste space, we
move those arrays out of the separately allocated union and into svc_rqst to
share with the kvec moved out of svc_tcp_recvfrom (various arrays are used at
different times, so there is no conflict).
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'net/sunrpc/svcsock.c')
| -rw-r--r-- | net/sunrpc/svcsock.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 25096d53667a..1d512337ccd9 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -955,7 +955,7 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp) struct svc_sock *svsk = rqstp->rq_sock; struct svc_serv *serv = svsk->sk_server; int len; - struct kvec vec[RPCSVC_MAXPAGES]; + struct kvec *vec; int pnum, vlen; dprintk("svc: tcp_recv %p data %d conn %d close %d\n", @@ -1053,6 +1053,7 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp) len = svsk->sk_reclen; set_bit(SK_DATA, &svsk->sk_flags); + vec = rqstp->rq_vec; vec[0] = rqstp->rq_arg.head[0]; vlen = PAGE_SIZE; pnum = 1; |