* Re: [PATCH V3] md-cluster: make md-cluster also can work when compiled into kernel
2016-09-05 2:17 ` [PATCH V3] md-cluster: make md-cluster also can work when compiled into kernel Guoqing Jiang
@ 2016-09-05 3:10 ` NeilBrown
2016-09-08 18:03 ` Shaohua Li
1 sibling, 0 replies; 3+ messages in thread
From: NeilBrown @ 2016-09-05 3:10 UTC (permalink / raw)
To: Guoqing Jiang, linux-raid; +Cc: shli, Guoqing Jiang, v4.1+
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On Mon, Sep 05 2016, Guoqing Jiang wrote:
> The md-cluster is compiled as module by default,
> if it is compiled by built-in way, then we can't
> make md-cluster works.
>
> [64782.630008] md/raid1:md127: active with 2 out of 2 mirrors
> [64782.630528] md-cluster module not found.
> [64782.630530] md127: Could not setup cluster service (-2)
>
> Fixes: edb39c9 ("Introduce md_cluster_operations to handle cluster functions")
> Cc: stable@vger.kernel.org (v4.1+)
> Cc: NeilBrown <neilb@suse.com>
> Reported-by: Marc Smith <marc.smith@mcc.edu>
> Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
> ---
> V3 changes:
> 1. add the "!md_cluster_ops" test back
> 2. fix wrong mail info of stable kernel
>
> V2 changes:
> 1. call try_module_get if md_cluster_ops is already set,
> otherwise try_module_get/module_put are unbalanced.
>
> drivers/md/md.c | 12 ++++--------
> 1 file changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/md/md.c b/drivers/md/md.c
> index 67642ba..915e84d 100644
> --- a/drivers/md/md.c
> +++ b/drivers/md/md.c
> @@ -7610,16 +7610,12 @@ EXPORT_SYMBOL(unregister_md_cluster_operations);
>
> int md_setup_cluster(struct mddev *mddev, int nodes)
> {
> - int err;
> -
> - err = request_module("md-cluster");
> - if (err) {
> - pr_err("md-cluster module not found.\n");
> - return -ENOENT;
> - }
> -
> + if (!md_cluster_ops)
> + request_module("md-cluster");
> spin_lock(&pers_lock);
> + /* ensure module won't be unloaded */
> if (!md_cluster_ops || !try_module_get(md_cluster_mod)) {
> + pr_err("can't find md-cluster module or get it's reference.\n");
> spin_unlock(&pers_lock);
> return -ENOENT;
> }
> --
> 2.6.6
Reviewed-by: NeilBrown <neilb@suse.com>
Thanks,
NeilBrown
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH V3] md-cluster: make md-cluster also can work when compiled into kernel
2016-09-05 2:17 ` [PATCH V3] md-cluster: make md-cluster also can work when compiled into kernel Guoqing Jiang
2016-09-05 3:10 ` NeilBrown
@ 2016-09-08 18:03 ` Shaohua Li
1 sibling, 0 replies; 3+ messages in thread
From: Shaohua Li @ 2016-09-08 18:03 UTC (permalink / raw)
To: Guoqing Jiang; +Cc: linux-raid, v4.1+, NeilBrown
On Sun, Sep 04, 2016 at 10:17:28PM -0400, Guoqing Jiang wrote:
> The md-cluster is compiled as module by default,
> if it is compiled by built-in way, then we can't
> make md-cluster works.
>
> [64782.630008] md/raid1:md127: active with 2 out of 2 mirrors
> [64782.630528] md-cluster module not found.
> [64782.630530] md127: Could not setup cluster service (-2)
>
> Fixes: edb39c9 ("Introduce md_cluster_operations to handle cluster functions")
> Cc: stable@vger.kernel.org (v4.1+)
> Cc: NeilBrown <neilb@suse.com>
> Reported-by: Marc Smith <marc.smith@mcc.edu>
> Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
> ---
> V3 changes:
> 1. add the "!md_cluster_ops" test back
> 2. fix wrong mail info of stable kernel
>
> V2 changes:
> 1. call try_module_get if md_cluster_ops is already set,
> otherwise try_module_get/module_put are unbalanced.
applied, thanks!
^ permalink raw reply [flat|nested] 3+ messages in thread