Re: [RFC PATCH 1/3] fs/drop_caches: do not scan procfs in drop_pagecache_sb()

[Alexey Dobriyan]

On Mon, Sep 14, 2026 at 02:14:47PM +0800, Huang Shijie wrote:
> There is no page cache for the procfs, so do not scan the
> inodes in procfs.

> @@ -20,6 +21,9 @@ static void drop_pagecache_sb(struct super_block *sb, void *unused)
>  {
>  	struct inode *inode, *toput_inode = NULL;
>  
> +	if (sb->s_magic == PROC_SUPER_MAGIC)
> +		return;

This should be some flag somewhere in superblock.
Other fake filesystems don't support pagecache too.