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Date: Wed, 24 Jul 2013 15:00:27 +0800
From: Peng Tao <bergwolf@...il.com>
To: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
linux-next@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Oleg Drokin <green@...mcloud.com>, Greg KH <greg@...ah.com>
Subject: Re: linux-next: manual merge of the akpm-current tree with the
staging tree
On Wed, Jul 24, 2013 at 1:57 PM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> 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).
>
Hi Stephen,
How will such conflicts be handled in the end? Do I need to send
rebased patch to Andrew?
Thanks,
Tao
> --
> Cheers,
> Stephen Rothwell sfr@...b.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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