Ilya Dryomov ba46d8fab0 libceph: force GFP_NOIO for socket allocations ... commit 633ee407b9d15a75ac9740ba9d3338815e1fcb95 upstream. sock_alloc_inode() allocates socket+inode and socket_wq with GFP_KERNEL, which is not allowed on the writeback path: Workqueue: ceph-msgr con_work [libceph] ffff8810871cb018 0000000000000046 0000000000000000 ffff881085d40000 0000000000012b00 ffff881025cad428 ffff8810871cbfd8 0000000000012b00 ffff880102fc1000 ffff881085d40000 ffff8810871cb038 ffff8810871cb148 Call Trace: [<ffffffff816dd629>] schedule+0x29/0x70 [<ffffffff816e066d>] schedule_timeout+0x1bd/0x200 [<ffffffff81093ffc>] ? ttwu_do_wakeup+0x2c/0x120 [<ffffffff81094266>] ? ttwu_do_activate.constprop.135+0x66/0x70 [<ffffffff816deb5f>] wait_for_completion+0xbf/0x180 [<ffffffff81097cd0>] ? try_to_wake_up+0x390/0x390 [<ffffffff81086335>] flush_work+0x165/0x250 [<ffffffff81082940>] ? worker_detach_from_pool+0xd0/0xd0 [<ffffffffa03b65b1>] xlog_cil_force_lsn+0x81/0x200 [xfs] [<ffffffff816d6b42>] ? __slab_free+0xee/0x234 [<ffffffffa03b4b1d>] _xfs_log_force_lsn+0x4d/0x2c0 [xfs] [<ffffffff811adc1e>] ? lookup_page_cgroup_used+0xe/0x30 [<ffffffffa039a723>] ? xfs_reclaim_inode+0xa3/0x330 [xfs] [<ffffffffa03b4dcf>] xfs_log_force_lsn+0x3f/0xf0 [xfs] [<ffffffffa039a723>] ? xfs_reclaim_inode+0xa3/0x330 [xfs] [<ffffffffa03a62c6>] xfs_iunpin_wait+0xc6/0x1a0 [xfs] [<ffffffff810aa250>] ? wake_atomic_t_function+0x40/0x40 [<ffffffffa039a723>] xfs_reclaim_inode+0xa3/0x330 [xfs] [<ffffffffa039ac07>] xfs_reclaim_inodes_ag+0x257/0x3d0 [xfs] [<ffffffffa039bb13>] xfs_reclaim_inodes_nr+0x33/0x40 [xfs] [<ffffffffa03ab745>] xfs_fs_free_cached_objects+0x15/0x20 [xfs] [<ffffffff811c0c18>] super_cache_scan+0x178/0x180 [<ffffffff8115912e>] shrink_slab_node+0x14e/0x340 [<ffffffff811afc3b>] ? mem_cgroup_iter+0x16b/0x450 [<ffffffff8115af70>] shrink_slab+0x100/0x140 [<ffffffff8115e425>] do_try_to_free_pages+0x335/0x490 [<ffffffff8115e7f9>] try_to_free_pages+0xb9/0x1f0 [<ffffffff816d56e4>] ? __alloc_pages_direct_compact+0x69/0x1be [<ffffffff81150cba>] __alloc_pages_nodemask+0x69a/0xb40 [<ffffffff8119743e>] alloc_pages_current+0x9e/0x110 [<ffffffff811a0ac5>] new_slab+0x2c5/0x390 [<ffffffff816d71c4>] __slab_alloc+0x33b/0x459 [<ffffffff815b906d>] ? sock_alloc_inode+0x2d/0xd0 [<ffffffff8164bda1>] ? inet_sendmsg+0x71/0xc0 [<ffffffff815b906d>] ? sock_alloc_inode+0x2d/0xd0 [<ffffffff811a21f2>] kmem_cache_alloc+0x1a2/0x1b0 [<ffffffff815b906d>] sock_alloc_inode+0x2d/0xd0 [<ffffffff811d8566>] alloc_inode+0x26/0xa0 [<ffffffff811da04a>] new_inode_pseudo+0x1a/0x70 [<ffffffff815b933e>] sock_alloc+0x1e/0x80 [<ffffffff815ba855>] __sock_create+0x95/0x220 [<ffffffff815baa04>] sock_create_kern+0x24/0x30 [<ffffffffa04794d9>] con_work+0xef9/0x2050 [libceph] [<ffffffffa04aa9ec>] ? rbd_img_request_submit+0x4c/0x60 [rbd] [<ffffffff81084c19>] process_one_work+0x159/0x4f0 [<ffffffff8108561b>] worker_thread+0x11b/0x530 [<ffffffff81085500>] ? create_worker+0x1d0/0x1d0 [<ffffffff8108b6f9>] kthread+0xc9/0xe0 [<ffffffff8108b630>] ? flush_kthread_worker+0x90/0x90 [<ffffffff816e1b98>] ret_from_fork+0x58/0x90 [<ffffffff8108b630>] ? flush_kthread_worker+0x90/0x90 Use memalloc_noio_{save,restore}() to temporarily force GFP_NOIO here. Link: http://tracker.ceph.com/issues/19309 Reported-by: Sergey Jerusalimov <wintchester@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-04-08 09:53:30 +02:00
..
crush	crush: sync up with userspace	2015-06-25 11:49:31 +03:00
armor.c	libceph: Fix base64-decoding when input ends in newline.	2011-03-15 09:14:02 -07:00
auth.c	libceph: wrap auth methods in a mutex	2013-05-01 21:17:15 -07:00
auth_none.c	libceph: Fix NULL pointer dereference in auth client code	2013-07-03 15:32:55 -07:00
auth_none.h	net: 8021q/bluetooth/bridge/can/ceph: Remove extern from function prototypes	2013-10-19 19:12:11 -04:00
auth_x.c	libceph: add nocephx_sign_messages option	2015-11-02 23:37:46 +01:00
auth_x.h	libceph: store session key in cephx authorizer	2014-12-17 20:09:50 +03:00
auth_x_protocol.h
buffer.c	libceph: nuke ceph_kvfree()	2014-12-17 20:09:50 +03:00
ceph_common.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client	2015-11-13 09:24:40 -08:00
ceph_fs.c	ceph: fix file mode calculation	2011-07-19 11:25:04 -07:00
ceph_hash.c	net: cleanup unsigned to unsigned int	2012-04-15 12:44:40 -04:00
ceph_strings.c	libceph: nuke pool op infrastructure	2015-02-19 13:31:37 +03:00
crypto.c	KEYS: Merge the type-specific data with the payload data	2015-10-21 15:18:36 +01:00
crypto.h	libceph: introduce ceph_x_authorizer_cleanup()	2015-11-02 23:36:48 +01:00
debugfs.c	libceph: expose client options through debugfs	2015-04-20 18:55:39 +03:00
Kconfig	libceph: select CRYPTO_CBC in addition to CRYPTO_AES	2014-10-14 21:03:20 +04:00
Makefile	libceph: create source file "net/ceph/snapshot.c"	2013-05-01 21:20:08 -07:00
messenger.c	libceph: force GFP_NOIO for socket allocations	2017-04-08 09:53:30 +02:00
mon_client.c	libceph: use keepalive2 to verify the mon session is alive	2015-09-08 23:14:30 +03:00
msgpool.c	libceph: initialize msgpool message types	2012-07-30 09:29:50 -07:00
osd_client.c	libceph: don't spam dmesg with stray reply warnings	2016-03-03 15:07:26 -08:00
osdmap.c	libceph: don't set weight to IN when OSD is destroyed	2017-03-30 09:35:18 +02:00
pagelist.c	libceph: reference counting pagelist	2014-10-14 12:56:48 -07:00
pagevec.c	libceph: use kvfree() instead of open-coding it	2015-06-25 11:49:28 +03:00
snapshot.c	libceph: create source file "net/ceph/snapshot.c"	2013-05-01 21:20:08 -07:00