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Subjectlinux-next: manual merge of the akpm-current tree with the staging tree
Hi Andrew,

Today's linux-next merge of the akpm-current tree got a conflict in
drivers/staging/lustre/lustre/ldlm/ldlm_pool.c between commit
91a50030f05e ("staging/lustre/ldlm: split client namespaces into active
and inactive") from the staging tree and commit 48a91248649f
("staging/lustre/ldlm: convert to shrinkers to count/scan API") from the
akpm-current tree.

I fixed it up (I think - see below) and can carry the fix as necessary
(no action is required).

--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au

diff --cc drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
index 101af4b,4c41e02..0000000
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
@@@ -597,16 -594,17 +593,17 @@@ int ldlm_pool_recalc(struct ldlm_pool *
count = pl->pl_ops->po_recalc(pl);
lprocfs_counter_add(pl->pl_stats, LDLM_POOL_RECALC_STAT,
count);
- return count;
}
+ recalc_interval_sec = pl->pl_recalc_time - cfs_time_current_sec() +
+ pl->pl_recalc_period;

- return 0;
+ return recalc_interval_sec;
}
-EXPORT_SYMBOL(ldlm_pool_recalc);

- /**
+ /*
* Pool shrink wrapper. Will call either client or server pool recalc callback
- * depending what pool \a pl is used.
+ * depending what pool pl is used. When nr == 0, just return the number of
+ * freeable locks. Otherwise, return the number of canceled locks.
*/
int ldlm_pool_shrink(struct ldlm_pool *pl, int nr,
unsigned int gfp_mask)
@@@ -1028,26 -1025,20 +1025,21 @@@ static struct ptlrpc_thread *ldlm_pools
static struct completion ldlm_pools_comp;

/*
- * Cancel \a nr locks from all namespaces (if possible). Returns number of
- * cached locks after shrink is finished. All namespaces are asked to
- * cancel approximately equal amount of locks to keep balancing.
+ * count locks from all namespaces (if possible). Returns number of
+ * cached locks.
*/
- static int ldlm_pools_shrink(ldlm_side_t client, int nr,
- unsigned int gfp_mask)
+ static unsigned long ldlm_pools_count(ldlm_side_t client, unsigned int gfp_mask)
{
- int total = 0, cached = 0, nr_ns;
+ unsigned long total = 0, nr_ns;
struct ldlm_namespace *ns;
+ struct ldlm_namespace *ns_old = NULL; /* loop detection */
void *cookie;

- if (client == LDLM_NAMESPACE_CLIENT && nr != 0 &&
- !(gfp_mask & __GFP_FS))
- return -1;
+ if (client == LDLM_NAMESPACE_CLIENT && !(gfp_mask & __GFP_FS))
+ return 0;

- CDEBUG(D_DLMTRACE, "Request to shrink %d %s locks from all pools\n",
- nr, client == LDLM_NAMESPACE_CLIENT ? "client" : "server");
+ CDEBUG(D_DLMTRACE, "Request to count %s locks from all pools\n",
+ client == LDLM_NAMESPACE_CLIENT ? "client" : "server");

cookie = cl_env_reenter();

@@@ -1094,8 -1080,8 +1096,8 @@@ static unsigned long ldlm_pools_scan(ld
/*
* Shrink at least ldlm_namespace_nr(client) namespaces.
*/
- for (nr_ns = ldlm_namespace_nr_read(client) - nr_ns;
- nr_ns > 0; nr_ns--)
- for (tmp = nr_ns = atomic_read(ldlm_namespace_nr(client));
++ for (tmp = nr_ns = ldlm_namespace_nr_read(client) - nr_ns;
+ tmp > 0; tmp--)
{
int cancel, nr_locks;

@@@ -1125,26 -1108,36 +1124,36 @@@
ldlm_namespace_put(ns);
}
cl_env_reexit(cookie);
- /* we only decrease the SLV in server pools shrinker, return -1 to
- * kernel to avoid needless loop. LU-1128 */
- return (client == LDLM_NAMESPACE_SERVER) ? -1 : cached;
+ /*
+ * we only decrease the SLV in server pools shrinker, return
+ * SHRINK_STOP to kernel to avoid needless loop. LU-1128
+ */
+ return (client == LDLM_NAMESPACE_SERVER) ? SHRINK_STOP : freed;
+ }
+
+ static unsigned long ldlm_pools_srv_count(struct shrinker *s, struct shrink_control *sc)
+ {
+ return ldlm_pools_count(LDLM_NAMESPACE_SERVER, sc->gfp_mask);
}

- static int ldlm_pools_srv_shrink(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask))
+ static unsigned long ldlm_pools_srv_scan(struct shrinker *s, struct shrink_control *sc)
{
- return ldlm_pools_shrink(LDLM_NAMESPACE_SERVER,
- shrink_param(sc, nr_to_scan),
- shrink_param(sc, gfp_mask));
+ return ldlm_pools_scan(LDLM_NAMESPACE_SERVER, sc->nr_to_scan,
+ sc->gfp_mask);
}

- static int ldlm_pools_cli_shrink(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask))
+ static unsigned long ldlm_pools_cli_count(struct shrinker *s, struct shrink_control *sc)
{
- return ldlm_pools_shrink(LDLM_NAMESPACE_CLIENT,
- shrink_param(sc, nr_to_scan),
- shrink_param(sc, gfp_mask));
+ return ldlm_pools_count(LDLM_NAMESPACE_CLIENT, sc->gfp_mask);
+ }
+
+ static unsigned long ldlm_pools_cli_scan(struct shrinker *s, struct shrink_control *sc)
+ {
+ return ldlm_pools_scan(LDLM_NAMESPACE_CLIENT, sc->nr_to_scan,
+ sc->gfp_mask);
}

-void ldlm_pools_recalc(ldlm_side_t client)
+int ldlm_pools_recalc(ldlm_side_t client)
{
__u32 nr_l = 0, nr_p = 0, l;
struct ldlm_namespace *ns;
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