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NFS based on file size issue sync copy or fallback to generic copy offload

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For small file sizes, it make sense to issue a synchronous copy (and
save an RPC callback operation). Also, for the inter copy offload,
copy len must be larger than the cost of doing a mount between the
destination and source server (14RPCs are sent during 4.x mount).

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
This commit is contained in:
Olga Kornievskaia
2019-07-03 10:38:02 -04:00
committed by Olga Kornievskaia
parent 0e65a32c8a
commit 1275101026
3 changed files with 18 additions and 4 deletions
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2
fs/nfs/nfs42.h
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@@ -16,7 +16,7 @@
#ifdef CONFIG_NFS_V4_2
int nfs42_proc_allocate(struct file *, loff_t, loff_t);
ssize_t nfs42_proc_copy(struct file *, loff_t, struct file *, loff_t, size_t,
struct nl4_server *, nfs4_stateid *);
struct nl4_server *, nfs4_stateid *, bool);
int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
loff_t nfs42_proc_llseek(struct file *, loff_t, int);
int nfs42_proc_layoutstats_generic(struct nfs_server *,