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-rw-r--r--Documentation/filesystems/vfs.txt6
-rw-r--r--fs/super.c1
2 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index fd24f34f120f..6bf85b78cfea 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -317,6 +317,12 @@ or bottom half).
the VM is trying to reclaim under GFP_NOFS conditions, hence this
method does not need to handle that situation itself.
+ Implementations must include conditional reschedule calls inside any
+ scanning loop that is done. This allows the VFS to determine
+ appropriate scan batch sizes without having to worry about whether
+ implementations will cause holdoff problems due to large scan batch
+ sizes.
+
Whoever sets up the inode is responsible for filling in the "i_op" field. This
is a pointer to a "struct inode_operations" which describes the methods that
can be performed on individual inodes.
diff --git a/fs/super.c b/fs/super.c
index 5101f0544960..7943f04cb3a9 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -182,6 +182,7 @@ static struct super_block *alloc_super(struct file_system_type *type)
s->s_shrink.seeks = DEFAULT_SEEKS;
s->s_shrink.shrink = prune_super;
+ s->s_shrink.batch = 1024;
}
out:
return s;