Hi, I am running unionfs 2.6 on top of unionfs on kernel 3.8.13.
I have an RW layer on top of an RO layer, both are ubifs partitions. I run into the same issue discussed in this thread (http://www.fsl.cs.sunysb.edu/pipermail/unionfs/2014-May/006172.html) even with unionfs 2.6 with the fix in place. If I run the mmap-write on a bare ubifs it works as expected with no asserts. Any insight as to what is missing or where I should look for solution would be greatly appreciated. My tree does include a patch for ubifs race condition (http://permalink.gmane.org/gmane.linux.kernel.commits.head/461000). These messages happen immediately when mmap-write is run. [ 29.666579] UBIFS assert failed in ubifs_set_page_dirty at 1420 (pid 890) [ 29.673611] Backtrace: [ 29.676186] [<c0011a58>] (dump_backtrace+0x0/0x10c) from [<c04c6688>] (dump_stack+0x18/0x1c) [ 29.684905] r6:cd4256fc r5:cd425700 r4:00000001 r3:60000013 [ 29.690831] [<c04c6670>] (dump_stack+0x0/0x1c) from [<c01d8688>] (ubifs_set_page_dirty+0x48/0x54) [ 29.700010] [<c01d8640>] (ubifs_set_page_dirty+0x0/0x54) from [<c0095d9c>] (set_page_dirty+0x88/0x98) [ 29.709534] r4:b6fbf000 r3:c01d8640 [ 29.713272] [<c0095d14>] (set_page_dirty+0x0/0x98) from [<c00a8f24>] (unmap_single_vma+0x4d4/0x584) [ 29.722622] [<c00a8a50>] (unmap_single_vma+0x0/0x584) from [<c00a9818>] (unmap_vmas+0x5c/0x70) [ 29.731524] [<c00a97bc>] (unmap_vmas+0x0/0x70) from [<c00acf04>] (unmap_region+0x9c/0x174) [ 29.740061] r8:cf49ea80 r7:cfb649f8 r6:cf51e370 r5:cf51eb00 r4:cd433ec8 [ 29.747072] [<c00ace68>] (unmap_region+0x0/0x174) from [<c00aed60>] (do_munmap+0x218/0x36c) [ 29.755708] [<c00aeb48>] (do_munmap+0x0/0x36c) from [<c00aeef8>] (vm_munmap+0x44/0x58) [ 29.763894] [<c00aeeb4>] (vm_munmap+0x0/0x58) from [<c00afcdc>] (sys_munmap+0x24/0x28) [ 29.772072] r7:0000005b r6:00000000 r5:00001000 r4:b6fbf000 [ 29.777990] [<c00afcb8>] (sys_munmap+0x0/0x28) from [<c000e5c0>] (ret_fast_syscall+0x0/0x30) [ 29.786707] r5:bebfad08 r4:00000000 These happen a little later, I assume when page is flushed. [ 62.632424] UBIFS assert failed in ubifs_writepage at 1008 (pid 714) [ 62.639011] Backtrace: [ 62.641582] [<c0011a58>] (dump_backtrace+0x0/0x10c) from [<c04c6688>] (dump_stack+0x18/0x1c) [ 62.650302] r6:d04b6180 r5:c0866300 r4:cfbb2000 r3:60000013 [ 62.656258] [<c04c6670>] (dump_stack+0x0/0x1c) from [<c01d9ccc>] (ubifs_writepage+0x1f4/0x234) [ 62.665170] [<c01d9ad8>] (ubifs_writepage+0x0/0x234) from [<c0095dc8>] (__writepage+0x1c/0x64) [ 62.674077] [<c0095dac>] (__writepage+0x0/0x64) from [<c0096a90>] (write_cache_pages+0x20c/0x3e8) [ 62.683241] r4:ffffffff r3:c0095dac [ 62.686980] [<c0096884>] (write_cache_pages+0x0/0x3e8) from [<c0096cb8>] (generic_writepages+0x4c/0x68) [ 62.696689] [<c0096c6c>] (generic_writepages+0x0/0x68) from [<c0097f2c>] (do_writepages+0x3c/0x40) [ 62.705942] r6:cfd05600 r5:cfe97088 r4:d04b6180 [ 62.710771] [<c0097ef0>] (do_writepages+0x0/0x40) from [<c00e23d8>] (__writeback_single_inode+0x30/0x120) [ 62.720659] [<c00e23a8>] (__writeback_single_inode+0x0/0x120) from [<c00e2c88>] (writeback_sb_inodes+0x338/0x584) [ 62.731256] r8:cfbb3ecc r7:cfe970d0 r6:cfd05600 r5:cfe97088 r4:d04b6180 r3:d04b61f4 [ 62.739451] [<c00e2950>] (writeback_sb_inodes+0x0/0x584) from [<c00e2fac>] (__writeback_inodes_wb+0xd8/0x114) [ 62.749695] [<c00e2ed4>] (__writeback_inodes_wb+0x0/0x114) from [<c00e33e4>] (wb_writeback+0x254/0x278) [ 62.759423] [<c00e3190>] (wb_writeback+0x0/0x278) from [<c00e3f54>] (wb_do_writeback+0x1f0/0x200) [ 62.768599] [<c00e3d64>] (wb_do_writeback+0x0/0x200) from [<c00e3ff0>] (bdi_writeback_thread+0x8c/0x164) [ 62.778402] [<c00e3f64>] (bdi_writeback_thread+0x0/0x164) from [<c005096c>] (kthread+0xb0/0xbc) [ 62.787396] [<c00508bc>] (kthread+0x0/0xbc) from [<c000e658>] (ret_from_fork+0x14/0x3c) [ 62.795663] r8:00000000 r7:00000000 r6:00000000 r5:c00508bc r4:d08d1ec8 [ 62.802740] UBIFS assert failed in do_writepage at 935 (pid 714) [ 62.808956] Backtrace: [ 62.811513] [<c0011a58>] (dump_backtrace+0x0/0x10c) from [<c04c6688>] (dump_stack+0x18/0x1c) [ 62.820305] r6:d04b6180 r5:cfe97000 r4:c0866300 r3:60000013 [ 62.826231] [<c04c6670>] (dump_stack+0x0/0x1c) from [<c01d9ac0>] (do_writepage+0x1d0/0x1e8) [ 62.834865] [<c01d98f0>] (do_writepage+0x0/0x1e8) from [<c01d9bf4>] (ubifs_writepage+0x11c/0x234) [ 62.844041] [<c01d9ad8>] (ubifs_writepage+0x0/0x234) from [<c0095dc8>] (__writepage+0x1c/0x64) [ 62.852945] [<c0095dac>] (__writepage+0x0/0x64) from [<c0096a90>] (write_cache_pages+0x20c/0x3e8) [ 62.862135] r4:ffffffff r3:c0095dac [ 62.865875] [<c0096884>] (write_cache_pages+0x0/0x3e8) from [<c0096cb8>] (generic_writepages+0x4c/0x68) [ 62.875585] [<c0096c6c>] (generic_writepages+0x0/0x68) from [<c0097f2c>] (do_writepages+0x3c/0x40) [ 62.884838] r6:cfd05600 r5:cfe97088 r4:d04b6180 [ 62.889663] [<c0097ef0>] (do_writepages+0x0/0x40) from [<c00e23d8>] (__writeback_single_inode+0x30/0x120) [ 62.899551] [<c00e23a8>] (__writeback_single_inode+0x0/0x120) from [<c00e2c88>] (writeback_sb_inodes+0x338/0x584) [ 62.910148] r8:cfbb3ecc r7:cfe970d0 r6:cfd05600 r5:cfe97088 r4:d04b6180 r3:d04b61f4 [ 62.918341] [<c00e2950>] (writeback_sb_inodes+0x0/0x584) from [<c00e2fac>] (__writeback_inodes_wb+0xd8/0x114) [ 62.928586] [<c00e2ed4>] (__writeback_inodes_wb+0x0/0x114) from [<c00e33e4>] (wb_writeback+0x254/0x278) [ 62.938293] [<c00e3190>] (wb_writeback+0x0/0x278) from [<c00e3f54>] (wb_do_writeback+0x1f0/0x200) [ 62.947464] [<c00e3d64>] (wb_do_writeback+0x0/0x200) from [<c00e3ff0>] (bdi_writeback_thread+0x8c/0x164) [ 62.957265] [<c00e3f64>] (bdi_writeback_thread+0x0/0x164) from [<c005096c>] (kthread+0xb0/0xbc) [ 62.966277] [<c00508bc>] (kthread+0x0/0xbc) from [<c000e658>] (ret_from_fork+0x14/0x3c) [ 62.974547] r8:00000000 r7:00000000 r6:00000000 r5:c00508bc r4:d08d1ec8 [ 62.981554] UBIFS assert failed in ubifs_release_budget at 567 (pid 714) [ 62.988476] Backtrace: [ 62.991031] [<c0011a58>] (dump_backtrace+0x0/0x10c) from [<c04c6688>] (dump_stack+0x18/0x1c) [ 62.999747] r6:cfbb2000 r5:cfbb3bfc r4:cfe97000 r3:60000013 [ 63.005670] [<c04c6670>] (dump_stack+0x0/0x1c) from [<c01f304c>] (ubifs_release_budget+0x514/0x520) [ 63.015022] [<c01f2b38>] (ubifs_release_budget+0x0/0x520) from [<c01d8714>] (release_existing_page_budget+0x3c/0x44) [ 63.025889] r9:00001000 r8:20000000 r7:00000000 r6:d04b6180 r5:cfe97000 r4:c0866300 [ 63.034076] [<c01d86d8>] (release_existing_page_budget+0x0/0x44) from [<c01d99a0>] (do_writepage+0xb0/0x1e8) [ 63.044233] [<c01d98f0>] (do_writepage+0x0/0x1e8) from [<c01d9bf4>] (ubifs_writepage+0x11c/0x234) [ 63.053405] [<c01d9ad8>] (ubifs_writepage+0x0/0x234) from [<c0095dc8>] (__writepage+0x1c/0x64) [ 63.062309] [<c0095dac>] (__writepage+0x0/0x64) from [<c0096a90>] (write_cache_pages+0x20c/0x3e8) [ 63.071476] r4:ffffffff r3:c0095dac [ 63.075214] [<c0096884>] (write_cache_pages+0x0/0x3e8) from [<c0096cb8>] (generic_writepages+0x4c/0x68) [ 63.084925] [<c0096c6c>] (generic_writepages+0x0/0x68) from [<c0097f2c>] (do_writepages+0x3c/0x40) [ 63.094179] r6:cfd05600 r5:cfe97088 r4:d04b6180 [ 63.099005] [<c0097ef0>] (do_writepages+0x0/0x40) from [<c00e23d8>] (__writeback_single_inode+0x30/0x120) [ 63.108894] [<c00e23a8>] (__writeback_single_inode+0x0/0x120) from [<c00e2c88>] (writeback_sb_inodes+0x338/0x584) [ 63.119492] r8:cfbb3ecc r7:cfe970d0 r6:cfd05600 r5:cfe97088 r4:d04b6180 r3:d04b61f4 [ 63.127686] [<c00e2950>] (writeback_sb_inodes+0x0/0x584) from [<c00e2fac>] (__writeback_inodes_wb+0xd8/0x114) [ 63.137932] [<c00e2ed4>] (__writeback_inodes_wb+0x0/0x114) from [<c00e33e4>] (wb_writeback+0x254/0x278) [ 63.147640] [<c00e3190>] (wb_writeback+0x0/0x278) from [<c00e3f54>] (wb_do_writeback+0x1f0/0x200) [ 63.156809] [<c00e3d64>] (wb_do_writeback+0x0/0x200) from [<c00e3ff0>] (bdi_writeback_thread+0x8c/0x164) [ 63.166612] [<c00e3f64>] (bdi_writeback_thread+0x0/0x164) from [<c005096c>] (kthread+0xb0/0xbc) [ 63.175607] [<c00508bc>] (kthread+0x0/0xbc) from [<c000e658>] (ret_from_fork+0x14/0x3c) [ 63.183876] r8:00000000 r7:00000000 r6:00000000 r5:c00508bc r4:d08d1ec8 -- Duck tape is like the force, it has a light side and a dark side and it holds the universe together. _______________________________________________ unionfs mailing list: http://unionfs.filesystems.org/ [email protected] http://www.fsl.cs.sunysb.edu/mailman/listinfo/unionfs
