[Devel] [PATCH RHEL7 COMMIT] fuse kio: initialize batch in pcs_map shrinker

Konstantin Khorenko khorenko at virtuozzo.com
Mon Oct 8 19:14:27 MSK 2018


The commit is pushed to "branch-rh7-3.10.0-862.14.4.vz7.72.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-862.14.4.vz7.72.4
------>
commit 902520831c2bd4e679b40a54e8d25a17661b1065
Author: Konstantin Khorenko <khorenko at virtuozzo.com>
Date:   Mon Oct 8 19:14:27 2018 +0300

    fuse kio: initialize batch in pcs_map shrinker
    
    Shinker memory is allocated in process_pcs_init_reply() via kvmalloc()
    (thus not zeroed) and "batch" field not initialized later in
    pcs_mapset_init(), so fit it and initialize to default batch value.
    
    Fixes: 9623c8c78601 ("fuse kio: Add pcs engine combo v0.8")
    https://pmc.acronis.com/browse/VSTOR-15801
    
    Signed-off-by: Konstantin Khorenko <khorenko at virtuozzo.com>
    Reviewed-by: Kirill Tkhai <ktkhai at virtuozzo.com>
---
 fs/fuse/kio/pcs/pcs_cluster_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/fuse/kio/pcs/pcs_cluster_core.c b/fs/fuse/kio/pcs/pcs_cluster_core.c
index b99e01e5edfe..d1379c99ac6a 100644
--- a/fs/fuse/kio/pcs/pcs_cluster_core.c
+++ b/fs/fuse/kio/pcs/pcs_cluster_core.c
@@ -51,6 +51,7 @@ static int pcs_mapset_init(struct pcs_map_set *maps)
 	maps->shrinker.count_objects = pcs_map_shrink_count;
 	maps->shrinker.scan_objects  = pcs_map_shrink_scan;
 	maps->shrinker.seeks = DEFAULT_SEEKS;
+	maps->shrinker.batch = 0;	/* use default reclaim batch size */
 	maps->shrinker.flags = SHRINKER_NUMA_AWARE;
 	register_shrinker(&maps->shrinker);
 


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