* v4.18-rc1 client deadlock
@ 2018-06-18 18:39 J. Bruce Fields
[not found] ` <CAFX2Jfn27dgiOtKjKf0xCJ__AspzKE3=tjqoc4A5RY_2QLPuAw@mail.gmail.com>
0 siblings, 1 reply; 2+ messages in thread
From: J. Bruce Fields @ 2018-06-18 18:39 UTC (permalink / raw)
To: linux-nfs
Connectathon tests are hanging for me on v4.18-rc1. Is this a known
issue?
--b.
[ 128.335964] mount.nfs (5196) used greatest stack depth: 11208 bytes left
[ 135.170104] ------------[ cut here ]------------
[ 135.171318] DEBUG_LOCKS_WARN_ON(sem->owner != ((struct task_struct *)(1UL << 0)))
[ 135.171334] WARNING: CPU: 2 PID: 54 at kernel/locking/rwsem.c:217 up_read_non_owner+0x58/0x60
[ 135.176504] Modules linked in: rpcsec_gss_krb5 nfsv4 nfs lockd grace auth_rpcgss sunrpc
[ 135.179149] CPU: 2 PID: 54 Comm: kworker/2:1 Not tainted 4.18.0-rc1-13725-g5b7b15aee641 #1778
[ 135.180826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.fc28 04/01/2014
[ 135.182101] Workqueue: nfsiod rpc_async_release [sunrpc]
[ 135.182725] RIP: 0010:up_read_non_owner+0x58/0x60
[ 135.183338] Code: bc 00 5b c3 e8 b9 34 66 00 85 c0 74 df 8b 05 bf 15 c1 02 85 c0 75 d5 48 c7 c6 18 7d 51 82 48 c7 c7 fb 71 50 82 e8 0c 94 fa ff <0f> 0b eb be 0f 1f 40 00 0f 1f 44 00 00 53 48 8b 74 24 08 48 89 fb
[ 135.186349] RSP: 0018:ffffc900001cbe18 EFLAGS: 00010286
[ 135.187033] RAX: 0000000000000000 RBX: ffff880069a748d8 RCX: 0000000000000001
[ 135.187982] RDX: 0000000080000001 RSI: ffffffff825602b6 RDI: 00000000ffffffff
[ 135.188896] RBP: ffff88006a1d0e00 R08: 0000000000000000 R09: 0000000000000001
[ 135.189806] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88006450c000
[ 135.190731] R13: ffff88007d371c00 R14: 0000000000000000 R15: ffff88007fd20480
[ 135.191643] FS: 0000000000000000(0000) GS:ffff88007fd00000(0000) knlGS:0000000000000000
[ 135.192803] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 135.193511] CR2: 00007f87b0883cb4 CR3: 0000000002858003 CR4: 00000000001606e0
[ 135.194558] Call Trace:
[ 135.194792] nfs_async_unlink_release+0x2d/0x80 [nfs]
[ 135.195405] rpc_free_task+0x2d/0x60 [sunrpc]
[ 135.195868] process_one_work+0x212/0x640
[ 135.196288] worker_thread+0x3c/0x390
[ 135.196681] ? process_one_work+0x640/0x640
[ 135.197161] kthread+0x11d/0x140
[ 135.197463] ? kthread_flush_work_fn+0x10/0x10
[ 135.197978] ret_from_fork+0x3a/0x50
[ 135.198366] irq event stamp: 78327
[ 135.198676] hardirqs last enabled at (78327): [<ffffffff81cb9419>] _raw_spin_unlock_irq+0x29/0x50
[ 135.199791] hardirqs last disabled at (78326): [<ffffffff81cb927f>] _raw_spin_lock_irq+0xf/0x40
[ 135.200929] softirqs last enabled at (69438): [<ffffffff81103226>] srcu_invoke_callbacks+0xd6/0x190
[ 135.202182] softirqs last disabled at (69434): [<ffffffff81103226>] srcu_invoke_callbacks+0xd6/0x190
[ 135.203471] ---[ end trace 7b0fac2ca4af7443 ]---
[ 569.422994] nfs: server test1.fieldses.org not responding, still trying
[ 604.238967] INFO: task bigfile:9141 blocked for more than 120 seconds.
[ 604.242603] Tainted: G W 4.18.0-rc1-13725-g5b7b15aee641 #1778
[ 604.245664] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 604.247738] bigfile D12696 9141 9106 0x00000000
[ 604.249033] Call Trace:
[ 604.249405] ? __schedule+0x317/0xbb0
[ 604.250153] schedule+0x32/0x90
[ 604.250767] io_schedule+0x12/0x40
[ 604.251425] wait_on_page_bit+0x110/0x150
[ 604.251883] ? add_to_page_cache_lru+0xe0/0xe0
[ 604.252418] __filemap_fdatawait_range+0xbc/0x120
[ 604.252967] filemap_write_and_wait_range+0x3e/0x70
[ 604.253536] nfs_file_fsync+0x6a/0x3e0 [nfs]
[ 604.254002] do_fsync+0x38/0x70
[ 604.254274] __x64_sys_fsync+0x10/0x20
[ 604.254631] do_syscall_64+0x50/0x180
[ 604.255073] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 604.255660] RIP: 0033:0x7fd696044b14
[ 604.256008] Code: Bad RIP value.
[ 604.256313] RSP: 002b:00007ffc894e5898 EFLAGS: 00000246 ORIG_RAX: 000000000000004a
[ 604.257255] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd696044b14
[ 604.258133] RDX: 0000000000002000 RSI: 0000000000605280 RDI: 0000000000000003
[ 604.259074] RBP: 00007ffc894e5cf0 R08: 0000000000000003 R09: 0000000000000000
[ 604.259977] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000400f90
[ 604.260878] R13: 00007ffc894e5e10 R14: 0000000000000000 R15: 0000000000000000
[ 604.261760] INFO: lockdep is turned off.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: v4.18-rc1 client deadlock
[not found] ` <CAFX2Jfn27dgiOtKjKf0xCJ__AspzKE3=tjqoc4A5RY_2QLPuAw@mail.gmail.com>
@ 2018-06-18 19:52 ` J. Bruce Fields
0 siblings, 0 replies; 2+ messages in thread
From: J. Bruce Fields @ 2018-06-18 19:52 UTC (permalink / raw)
To: Anna Schumaker; +Cc: linux-nfs
On Mon, Jun 18, 2018 at 03:46:16PM -0400, Anna Schumaker wrote:
> If this is generic/013, then this might be the same issue I was hitting
> last week. I sent out a patch titled: "NFS: Fix an rcu deadlock in
> nfs_delegation_find_inode()" that should fix it.
>
> I hope this helps!
I saw it hang in connectathon tests, not xfstests.
That said, Trond's linux-next (which includes your patch) seems to be
getting through all the same tests without a hang.
(Still the same lock debugging warning, though, is it know whether
that's a real bug or a false positive?)
--b.
> Anna
>
> On Mon, Jun 18, 2018 at 2:40 PM J. Bruce Fields <bfields@fieldses.org>
> wrote:
>
> > Connectathon tests are hanging for me on v4.18-rc1. Is this a known
> > issue?
> >
> > --b.
> >
> > [ 128.335964] mount.nfs (5196) used greatest stack depth: 11208 bytes left
> > [ 135.170104] ------------[ cut here ]------------
> > [ 135.171318] DEBUG_LOCKS_WARN_ON(sem->owner != ((struct task_struct
> > *)(1UL << 0)))
> > [ 135.171334] WARNING: CPU: 2 PID: 54 at kernel/locking/rwsem.c:217
> > up_read_non_owner+0x58/0x60
> > [ 135.176504] Modules linked in: rpcsec_gss_krb5 nfsv4 nfs lockd grace
> > auth_rpcgss sunrpc
> > [ 135.179149] CPU: 2 PID: 54 Comm: kworker/2:1 Not tainted
> > 4.18.0-rc1-13725-g5b7b15aee641 #1778
> > [ 135.180826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
> > 1.11.0-2.fc28 04/01/2014
> > [ 135.182101] Workqueue: nfsiod rpc_async_release [sunrpc]
> > [ 135.182725] RIP: 0010:up_read_non_owner+0x58/0x60
> > [ 135.183338] Code: bc 00 5b c3 e8 b9 34 66 00 85 c0 74 df 8b 05 bf 15 c1
> > 02 85 c0 75 d5 48 c7 c6 18 7d 51 82 48 c7 c7 fb 71 50 82 e8 0c 94 fa ff
> > <0f> 0b eb be 0f 1f 40 00 0f 1f 44 00 00 53 48 8b 74 24 08 48 89 fb
> > [ 135.186349] RSP: 0018:ffffc900001cbe18 EFLAGS: 00010286
> > [ 135.187033] RAX: 0000000000000000 RBX: ffff880069a748d8 RCX:
> > 0000000000000001
> > [ 135.187982] RDX: 0000000080000001 RSI: ffffffff825602b6 RDI:
> > 00000000ffffffff
> > [ 135.188896] RBP: ffff88006a1d0e00 R08: 0000000000000000 R09:
> > 0000000000000001
> > [ 135.189806] R10: 0000000000000000 R11: 0000000000000000 R12:
> > ffff88006450c000
> > [ 135.190731] R13: ffff88007d371c00 R14: 0000000000000000 R15:
> > ffff88007fd20480
> > [ 135.191643] FS: 0000000000000000(0000) GS:ffff88007fd00000(0000)
> > knlGS:0000000000000000
> > [ 135.192803] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 135.193511] CR2: 00007f87b0883cb4 CR3: 0000000002858003 CR4:
> > 00000000001606e0
> > [ 135.194558] Call Trace:
> > [ 135.194792] nfs_async_unlink_release+0x2d/0x80 [nfs]
> > [ 135.195405] rpc_free_task+0x2d/0x60 [sunrpc]
> > [ 135.195868] process_one_work+0x212/0x640
> > [ 135.196288] worker_thread+0x3c/0x390
> > [ 135.196681] ? process_one_work+0x640/0x640
> > [ 135.197161] kthread+0x11d/0x140
> > [ 135.197463] ? kthread_flush_work_fn+0x10/0x10
> > [ 135.197978] ret_from_fork+0x3a/0x50
> > [ 135.198366] irq event stamp: 78327
> > [ 135.198676] hardirqs last enabled at (78327): [<ffffffff81cb9419>]
> > _raw_spin_unlock_irq+0x29/0x50
> > [ 135.199791] hardirqs last disabled at (78326): [<ffffffff81cb927f>]
> > _raw_spin_lock_irq+0xf/0x40
> > [ 135.200929] softirqs last enabled at (69438): [<ffffffff81103226>]
> > srcu_invoke_callbacks+0xd6/0x190
> > [ 135.202182] softirqs last disabled at (69434): [<ffffffff81103226>]
> > srcu_invoke_callbacks+0xd6/0x190
> > [ 135.203471] ---[ end trace 7b0fac2ca4af7443 ]---
> > [ 569.422994] nfs: server test1.fieldses.org not responding, still trying
> > [ 604.238967] INFO: task bigfile:9141 blocked for more than 120 seconds.
> > [ 604.242603] Tainted: G W
> > 4.18.0-rc1-13725-g5b7b15aee641 #1778
> > [ 604.245664] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
> > this message.
> > [ 604.247738] bigfile D12696 9141 9106 0x00000000
> > [ 604.249033] Call Trace:
> > [ 604.249405] ? __schedule+0x317/0xbb0
> > [ 604.250153] schedule+0x32/0x90
> > [ 604.250767] io_schedule+0x12/0x40
> > [ 604.251425] wait_on_page_bit+0x110/0x150
> > [ 604.251883] ? add_to_page_cache_lru+0xe0/0xe0
> > [ 604.252418] __filemap_fdatawait_range+0xbc/0x120
> > [ 604.252967] filemap_write_and_wait_range+0x3e/0x70
> > [ 604.253536] nfs_file_fsync+0x6a/0x3e0 [nfs]
> > [ 604.254002] do_fsync+0x38/0x70
> > [ 604.254274] __x64_sys_fsync+0x10/0x20
> > [ 604.254631] do_syscall_64+0x50/0x180
> > [ 604.255073] entry_SYSCALL_64_after_hwframe+0x49/0xbe
> > [ 604.255660] RIP: 0033:0x7fd696044b14
> > [ 604.256008] Code: Bad RIP value.
> > [ 604.256313] RSP: 002b:00007ffc894e5898 EFLAGS: 00000246 ORIG_RAX:
> > 000000000000004a
> > [ 604.257255] RAX: ffffffffffffffda RBX: 0000000000000000 RCX:
> > 00007fd696044b14
> > [ 604.258133] RDX: 0000000000002000 RSI: 0000000000605280 RDI:
> > 0000000000000003
> > [ 604.259074] RBP: 00007ffc894e5cf0 R08: 0000000000000003 R09:
> > 0000000000000000
> > [ 604.259977] R10: 0000000000000000 R11: 0000000000000246 R12:
> > 0000000000400f90
> > [ 604.260878] R13: 00007ffc894e5e10 R14: 0000000000000000 R15:
> > 0000000000000000
> > [ 604.261760] INFO: lockdep is turned off.
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> >
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2018-06-18 18:39 v4.18-rc1 client deadlock J. Bruce Fields
[not found] ` <CAFX2Jfn27dgiOtKjKf0xCJ__AspzKE3=tjqoc4A5RY_2QLPuAw@mail.gmail.com>
2018-06-18 19:52 ` J. Bruce Fields
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