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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-11-20 14:45:48 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-12-06 00:30:42 +0100 |
| commit | 97e548a93de213b149eea025a97d88e28143b445 (patch) | |
| tree | 7536bccb32193adf105bc1ede6462d6482589f4e /fs/nfs/nfs4proc.c | |
| parent | 1b285ff16ab52fb401aed7ce70abed4bb65b30b5 (diff) | |
| download | linux-3.10-97e548a93de213b149eea025a97d88e28143b445.tar.gz linux-3.10-97e548a93de213b149eea025a97d88e28143b445.tar.bz2 linux-3.10-97e548a93de213b149eea025a97d88e28143b445.zip | |
NFSv4.1: Support dynamic resizing of the session slot table
Allow the server to control the size of the session slot table
by adjusting the value of sr_target_max_slots in the reply to the
SEQUENCE operation.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4proc.c')
| -rw-r--r-- | fs/nfs/nfs4proc.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 62212231ce6..1792ece8b53 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -492,10 +492,17 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) static void nfs41_set_target_slotid_locked(struct nfs4_slot_table *tbl, u32 target_highest_slotid) { + unsigned int max_slotid, i; + if (tbl->target_highest_slotid == target_highest_slotid) return; tbl->target_highest_slotid = target_highest_slotid; tbl->generation++; + + max_slotid = min(tbl->max_slots - 1, tbl->target_highest_slotid); + for (i = tbl->max_slotid + 1; i <= max_slotid; i++) + rpc_wake_up_next(&tbl->slot_tbl_waitq); + tbl->max_slotid = max_slotid; } void nfs41_set_target_slotid(struct nfs4_slot_table *tbl, @@ -622,8 +629,8 @@ static struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl) dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n", __func__, tbl->used_slots[0], tbl->highest_used_slotid, tbl->max_slots); - slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); - if (slotid >= tbl->max_slots) + slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slotid + 1); + if (slotid > tbl->max_slotid) goto out; __set_bit(slotid, tbl->used_slots); if (slotid > tbl->highest_used_slotid || @@ -5744,6 +5751,7 @@ static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl, tbl->highest_used_slotid = NFS4_NO_SLOT; tbl->target_highest_slotid = max_slots - 1; tbl->server_highest_slotid = max_slots - 1; + tbl->max_slotid = max_slots - 1; for (i = 0; i < tbl->max_slots; i++) tbl->slots[i].seq_nr = ivalue; spin_unlock(&tbl->slot_tbl_lock); |