On Wed, 21 Dec 2011 11:05:48 -0600 Dave Kleikamp <dave.kleikamp@xxxxxxxxxx> wrote: > [ updated to remove now-obsolete comment in read_cache_page_gfp()] > > lockdep reports a deadlock in jfs because a special inode's rw semaphore > is taken recursively. The mapping's gfp mask is GFP_NOFS, but is not used > when __read_cache_page() calls add_to_page_cache_lru(). Well hang on, it's not just a lockdep splat. The kernel actually will deadlock if we reenter JFS via this GFP_KERNEL allocation attempt, yes? Was that GFP_NOFS allocation recently added to JFS? If not then we should backport this deadlock fix into -stable, no? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>