diff options
| -rw-r--r-- | module/zfs/zfs_vfsops.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/module/zfs/zfs_vfsops.c b/module/zfs/zfs_vfsops.c index 7696071f1..a72841c15 100644 --- a/module/zfs/zfs_vfsops.c +++ b/module/zfs/zfs_vfsops.c @@ -1050,8 +1050,7 @@ zfs_root(zfs_sb_t *zsb, struct inode **ipp) } EXPORT_SYMBOL(zfs_root); -#if !defined(HAVE_SPLIT_SHRINKER_CALLBACK) && !defined(HAVE_SHRINK) && \ - defined(HAVE_D_PRUNE_ALIASES) +#ifdef HAVE_D_PRUNE_ALIASES /* * Linux kernels older than 3.1 do not support a per-filesystem shrinker. * To accommodate this we must improvise and manually walk the list of znodes @@ -1141,15 +1140,29 @@ zfs_sb_prune(struct super_block *sb, unsigned long nr_to_scan, int *objects) } else { *objects = (*shrinker->scan_objects)(shrinker, &sc); } + #elif defined(HAVE_SPLIT_SHRINKER_CALLBACK) *objects = (*shrinker->scan_objects)(shrinker, &sc); #elif defined(HAVE_SHRINK) *objects = (*shrinker->shrink)(shrinker, &sc); #elif defined(HAVE_D_PRUNE_ALIASES) +#define D_PRUNE_ALIASES_IS_DEFAULT *objects = zfs_sb_prune_aliases(zsb, nr_to_scan); #else #error "No available dentry and inode cache pruning mechanism." #endif + +#if defined(HAVE_D_PRUNE_ALIASES) && !defined(D_PRUNE_ALIASES_IS_DEFAULT) +#undef D_PRUNE_ALIASES_IS_DEFAULT + /* + * Fall back to zfs_sb_prune_aliases if the kernel's per-superblock + * shrinker couldn't free anything, possibly due to the inodes being + * allocated in a different memcg. + */ + if (*objects == 0) + *objects = zfs_sb_prune_aliases(zsb, nr_to_scan); +#endif + ZFS_EXIT(zsb); dprintf_ds(zsb->z_os->os_dsl_dataset, |