set_page_dirty/page_launder deadlock

From: Marcelo Tosatti (marcelo@conectiva.com.br)
Date: Sat Jan 13 2001 - 22:21:22 EST

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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This archive was generated by hypermail 2b29 : Mon Jan 15 2001 - 21:00:38 EST