On Tue, Dec 11, 2012 at 10:42:07AM -0500, Dave Jones wrote: > This says rc8+, but it's just missing the Makefile change, so it's still > there in 3.7 > Curious that firefox was the process mentioned here, as ~/.mozilla isn't on > xfs. > My only xfs partition is /data holding a kernel source tree & .ccache
The fs freeze lockdep annotations have caused some .... interesting lockdep reports..... > [30557.776326] 3 locks on stack by firefox/17386: > [30557.776571] #0: blocked: (&mm->mmap_sem){++++++}, instance: > ffff8800a823c308, at: [<ffffffff816ac2b3>] __do_page_fault+0x103/0x4f0 > [30557.777276] #1: blocked: (shrinker_rwsem){++++..}, instance: > ffffffff81c49de0, at: [<ffffffff81169ccc>] shrink_slab+0x3c/0x510 > [30557.777962] #2: blocked: (&type->s_umount_key#42){.+.+.+}, instance: > ffff8800c4ed5730, at: [<ffffffff811c24c4>] grab_super_passive+0x44/0x90 There's no filesystem specific locks here, and it indicates that the shrinkers are involved, so firefox can indeed touch the XFS filesystem directly this way... > [30557.789160] RECLAIM_FS-ON-W at: > [30557.789362] [<ffffffff810c8042>] > mark_held_locks+0xb2/0x130 > [30557.789792] [<ffffffff810c8795>] > lockdep_trace_alloc+0x75/0xd0 > [30557.790241] [<ffffffff811af81a>] > kmem_cache_alloc_node_trace+0x3a/0x2e0 > [30557.790740] [<ffffffff81192242>] > vm_map_ram+0x2a2/0x7f0 > [30557.791161] [<ffffffffa052a4c3>] > _xfs_buf_map_pages+0x73/0x130 [xfs] > [30557.791646] [<ffffffffa052baeb>] > xfs_buf_get_map+0x15b/0x270 [xfs] > [30557.792114] [<ffffffffa05ada19>] > xfs_trans_get_buf_map+0x1d9/0x3b0 [xfs] > [30557.792615] [<ffffffffa0589f04>] > xfs_ialloc_inode_init+0xe4/0x1f0 [xfs] Oh, that's already fixed in the 3.8- queue. $ gl -n 1 7c4cebe commit 7c4cebe8e02dd0b0e655605442bbe9268db9ed4f Author: Dave Chinner <dchin...@redhat.com> Date: Fri Nov 23 14:24:23 2012 +1100 xfs: inode allocation should use unmapped buffers. Inode buffers do not need to be mapped as inodes are read or written directly from/to the pages underlying the buffer. This fixes a regression introduced by commit 611c994 ("xfs: make XBF_MAPPED the default behaviour"). .... Cheers, Dave. -- Dave Chinner da...@fromorbit.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/