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Message-ID: <aday7a8cg24.fsf@cisco.com> Date: Tue, 29 Jan 2008 16:28:35 -0800 From: Roland Dreier <rdreier@...co.com> To: linux-kernel@...r.kernel.org Subject: task blocked in sync_buffer from ext3_free_branches I'm getting the following while building a kernel (with make -j24 on an 8 CPU system: 4 socket dual-core opteron) with current Linus git (5b10ca19 is my head). Once this happens the build is hung, although I can ssh in and get a new shell OK. Any ideas or suggestions on what would be useful debugging information? [ 201.820629] INFO: task mv:7225 blocked for more than 120 seco. [ 201.824624] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 201.828622] mv D 0000000000000000 0 7225 7055 [ 201.840623] ffff8101c11bdb48 0000000000000086 0000000000000000 ffff810074432360 [ 201.857186] ffff810242822c00 ffff8101c11bdaf8 ffff810074432360 ffffffff80597200 [ 201.876624] ffffffff80597200 ffffffff80593c80 ffffffff80597200 ffff8101c1059120 [ 201.892626] Call Trace: [ 201.896647] [<ffffffff8029acc3>] sync_buffer+0x0/0x40 [ 201.900628] [<ffffffff804239c9>] io_schedule+0x28/0x33 [ 201.904628] [<ffffffff8029acfe>] sync_buffer+0x3b/0x40 [ 201.908628] [<ffffffff80423c1d>] __wait_on_bit+0x40/0x6e [ 201.912629] [<ffffffff8029acc3>] sync_buffer+0x0/0x40 [ 201.916628] [<ffffffff80423cb7>] out_of_line_wait_on_bit+0x6c/0x78 [ 201.920631] [<ffffffff8023f9b1>] wake_bit_function+0x0/0x23 [ 201.924630] [<ffffffff8029bfa1>] __bread+0x61/0x76 [ 201.928632] [<ffffffff802c10af>] ext3_free_branches+0x90/0x1b8 [ 201.932631] [<ffffffff802c18f4>] ext3_truncate+0x71d/0x871 [ 201.936632] [<ffffffff802ece75>] start_this_handle+0x294/0x304 [ 201.940631] [<ffffffff802ec7dc>] journal_stop+0x192/0x19e [ 201.944632] [<ffffffff802ecf80>] journal_start+0x9b/0xd2 [ 201.948632] [<ffffffff802c202f>] ext3_delete_inode+0x7a/0xcf [ 201.952631] [<ffffffff802c1fb5>] ext3_delete_inode+0x0/0xcf [ 201.956632] [<ffffffff8028df30>] generic_delete_inode+0xa7/0x11d [ 201.960631] [<ffffffff8028b36d>] d_kill+0x34/0x55 [ 201.964632] [<ffffffff8028b71a>] dput+0x101/0x10b [ 201.968633] [<ffffffff8028598b>] sys_renameat+0x18d/0x1fc [ 201.972634] [<ffffffff80426986>] do_page_fault+0x3d8/0x724 [ 201.976635] [<ffffffff8027f461>] sys_newlstat+0x28/0x31 [ 201.980636] [<ffffffff8020bede>] system_call+0x7e/0x83 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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