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authorNeilBrown <neilb@suse.de>2006-10-04 02:15:47 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-04 07:55:15 -0700
commit3cc03b164cf01c6f36e64720b58610d292fb26f7 (patch)
treeb558e11a087945ad5b9a1a25483aa2acc8d93fbb /fs/nfsd/nfsproc.c
parent4452435948424e5322c2a2fefbdc2cf3732cc45d (diff)
downloadlinux-3cc03b164cf01c6f36e64720b58610d292fb26f7.tar.bz2
[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 'fs/nfsd/nfsproc.c')
-rw-r--r--fs/nfsd/nfsproc.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 4e06810b6104..ca4973150218 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -159,7 +159,7 @@ nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
resp->count = argp->count;
nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
argp->offset,
- argp->vec, argp->vlen,
+ rqstp->rq_vec, argp->vlen,
&resp->count);
if (nfserr) return nfserr;
@@ -185,7 +185,7 @@ nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
argp->offset,
- argp->vec, argp->vlen,
+ rqstp->rq_vec, argp->vlen,
argp->len,
&stable);
return nfsd_return_attrs(nfserr, resp);