Hi,
While taking a look at page_launder()...
/* And re-start the thing.. */
spin_lock(&pagemap_lru_lock); <----------
if (result != 1)
continue;
/* writepage refused to do anything */
set_page_dirty(page);
^^^^^^^^^^^^^^^^^^^^
goto page_active;
}
set_page_dirty() may lock the pagecache_lock which means potential
deadlock since we have the pagemap_lru_lock locked.
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