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nfsd4: allow large readdirs

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Currently we limit readdir results to a single page.  This can result in
a performance regression compared to NFSv3 when reading large
directories.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields
2014-01-20 16:37:11 -05:00
parent 32aaa62ede
commit 561f0ed498
3 changed files with 82 additions and 69 deletions
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9
fs/nfsd/nfs4proc.c
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@@ -1500,13 +1500,14 @@ static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
u32 maxcount = svc_max_payload(rqstp);
u32 rlen = op->u.readdir.rd_maxcount;
if (rlen > PAGE_SIZE)
rlen = PAGE_SIZE;
if (rlen > maxcount)
rlen = maxcount;
return (op_encode_hdr_size + op_encode_verifier_maxsz)
* sizeof(__be32) + rlen;
return (op_encode_hdr_size + op_encode_verifier_maxsz +
XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)