Ceph » Linux kernel client

iput can sleep, but is called with spinlocks held in some cases.

Dec  9 10:45:26 tgpro1 kernel: BUG: scheduling while atomic: firefox-bin/31447/0x10000002
Dec  9 10:45:26 tgpro1 kernel: 2 locks held by firefox-bin/31447:
Dec  9 10:45:26 tgpro1 kernel:  #0:  (&sb->s_type->i_mutex_key#12){+.+.+.}, at: [<006c1e12>] ceph_dir_fsync+0x77/0x18a [ceph]
Dec  9 10:45:26 tgpro1 kernel:  #1:  (&(&ci->i_unsafe_lock)->rlock){+.+...}, at: [<006c1ecc>] ceph_dir_fsync+0x131/0x18a [ceph]
Dec  9 10:45:26 tgpro1 kernel: Modules linked in: parport_pc lp parport ceph libceph btrfs zlib_deflate lzo_decompress lzo_compress zlib_inflate libcrc32c fuse e1000e i2c_i801 i2c_core iTCO_wdt iTCO_vendor_support evdev igb rtc_cmos button
Dec  9 10:45:26 tgpro1 kernel: Pid: 31447, comm: firefox-bin Tainted: G        W   3.1.4-rsbac #1
Dec  9 10:45:26 tgpro1 kernel: Call Trace:
Dec  9 10:45:26 tgpro1 kernel:  [<00060591>] __schedule_bug+0x5d/0x64
Dec  9 10:45:26 tgpro1 kernel:  [<0053ca0f>] __schedule+0x8e/0xb60
Dec  9 10:45:26 tgpro1 kernel:  [<000025c0>] ? __switch_to+0x1a/0x1a
Dec  9 10:45:26 tgpro1 kernel:  [<0008e987>] ? mark_held_locks+0xac/0xc9
Dec  9 10:45:26 tgpro1 kernel:  [<000a095a>] ? res_counter_uncharge+0x50/0x58
Dec  9 10:45:26 tgpro1 kernel:  [<0008ebfb>] ? trace_hardirqs_on_caller+0x10b/0x13c
Dec  9 10:45:26 tgpro1 kernel:  [<0008ec37>] ? trace_hardirqs_on+0xb/0xd
Dec  9 10:45:26 tgpro1 kernel:  [<0053d555>] _cond_resched+0x24/0x37
Dec  9 10:45:26 tgpro1 kernel:  [<000b9ef3>] truncate_inode_pages_range+0x10e/0x2d8
Dec  9 10:45:26 tgpro1 kernel:  [<0007ebc5>] ? wake_up_bit+0x57/0x5b
Dec  9 10:45:26 tgpro1 kernel:  [<00100414>] ? evict+0x57/0x12c
Dec  9 10:45:26 tgpro1 kernel:  [<000ba0c9>] truncate_inode_pages+0xc/0x10
Dec  9 10:45:26 tgpro1 kernel:  [<00100460>] evict+0xa3/0x12c
Dec  9 10:45:26 tgpro1 kernel:  [<0010063c>] iput+0x153/0x158
Dec  9 10:45:26 tgpro1 kernel:  [<000fe5fe>] d_kill+0xc9/0xe2
Dec  9 10:45:26 tgpro1 kernel:  [<000fed51>] dput+0x120/0x12b
Dec  9 10:45:26 tgpro1 kernel:  [<006d5883>] ? ceph_mdsc_create_request+0xf5/0xf5 [ceph]
Dec  9 10:45:26 tgpro1 kernel:  [<006d5912>] ceph_mdsc_release_request+0x8f/0xf9 [ceph]
Dec  9 10:45:26 tgpro1 kernel:  [<001b44a4>] kref_put+0x3f/0x48
Dec  9 10:45:26 tgpro1 kernel:  [<006c1ed9>] ceph_dir_fsync+0x13e/0x18a [ceph]
Dec  9 10:45:26 tgpro1 kernel:  [<000237f0>] ? kunmap+0x7/0x4e
Dec  9 10:45:26 tgpro1 kernel:  [<006c1d9b>] ? ceph_finish_lookup+0x92/0x92 [ceph]
Dec  9 10:45:26 tgpro1 kernel:  [<0010c7cf>] vfs_fsync_range+0x23/0x35
Dec  9 10:45:26 tgpro1 kernel:  [<0010c7f5>] vfs_fsync+0x14/0x16
Dec  9 10:45:26 tgpro1 kernel:  [<0010ca00>] do_fsync+0x23/0x33
Dec  9 10:45:26 tgpro1 kernel:  [<0010ca20>] sys_fdatasync+0x10/0x12
Dec  9 10:45:26 tgpro1 kernel:  [<0053faba>] syscall_call+0x7/0xb
Dec  9 10:45:26 tgpro1 kernel:  [<00530000>] ? update_res+0xc0/0x179