Hi, In running xfstests on 3.8.0-rc4 with Shaggy's O_DIRECT loop patch set, test 049 never completes (it's been hung for most of the weekend), and I get this repeatedly in dmesg: [234733.925026] ------------[ cut here ]------------ [234733.929725] WARNING: at fs/ext4/mballoc.c:3803 ext4_discard_preallocations+0x371/0x400() [234733.937883] Hardware name: PowerEdge R715 [234733.941971] Modules linked in: xfs libcrc32c fuse sunrpc binfmt_misc dcdbas kvm_amd kvm microcode serio_raw pcspkr ses enclosure ixgbe dca ptp pps_core mdio k10temp amd64_edac_mod edac_core edac_mce_amd sp5100_tco i2c_piix4 i2c_core sg acpi_power_meter bnx2 sr_mod cdrom sd_mod crc_t10dif usb_storage megaraid_sas mpt2sas scsi_transport_sas raid_class dm_mirror dm_region_hash dm_log dm_mod [234733.976754] Pid: 55604, comm: fsstress Tainted: G W 3.8.0-rc4+ #30 [234733.983870] Call Trace: [234733.986405] [<ffffffff8106504f>] warn_slowpath_common+0x7f/0xc0 [234733.992485] [<ffffffff810650aa>] warn_slowpath_null+0x1a/0x20 [234733.998395] [<ffffffff8125dca1>] ext4_discard_preallocations+0x371/0x400 [234734.005257] [<ffffffff811df135>] ? fsnotify+0x1d5/0x2f0 [234734.010650] [<ffffffff81221187>] ext4_release_file+0xa7/0xe0 [234734.016474] [<ffffffff811a16db>] __fput+0xbb/0x260 [234734.021433] [<ffffffff811a18ee>] ____fput+0xe/0x10 [234734.026395] [<ffffffff81085a6f>] task_work_run+0x8f/0xf0 [234734.031875] [<ffffffff81014af5>] do_notify_resume+0xb5/0xc0 [234734.037612] [<ffffffff81616592>] int_signal+0x12/0x17 [234734.042828] ---[ end trace 496b2af844fac579 ]--- [234735.045084] EXT4-fs (loop3): uh-oh! used pa while discarding Note that I was running the tests on a loop device: # losetup -a /dev/loop0: [fd00]:3032796 (/root/phro/xfstests-dev/testdev.img) /dev/loop1: [fd00]:3032797 (/root/phro/xfstests-dev/scratchdev.img) /dev/loop2: [0701]:12 (/mnt/scratch/test.xfs) /dev/loop3: [0702]:131 (/mnt/scratch/test/test.ext2) TEST_DEV is loop0, SCRATCH_DEV is loop1. I'll try to reproduce on a regular device. Has anyone seen anything like this? Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
