On Wed, Jun 01, 2016 at 02:39:36PM -0700, Andrew Morton wrote:

On Wed,  1 Jun 2016 08:21:20 +0900 Minchan Kim [off-list ref] wrote:

quoted

This patch introduces run-time migration feature for zspage.

...

+static void kick_deferred_free(struct zs_pool *pool)
+{
+	schedule_work(&pool->free_work);
+}

When CONFIG_ZSMALLOC=m, what keeps all the data structures in place
during a concurrent rmmod?

The most of data structure in zram start to work by user calling
zs_create_pool and user of zsmalloc should call zs_destroy_pool
before trying doing rmmod where zs_unregister_migration does
flush_work(&pool->free_work).

If I miss something, please let me know it.

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