NFSv4.x/callback: Create the callback service through svc_create_pooled
As the comments for svc_set_num_threads() said,
" Destroying threads relies on the service threads filling in
rqstp->rq_task, which only the nfs ones do. Assumes the serv
has been created using svc_create_pooled()."
If creating service through svc_create(), the svc_pool_map_put()
will be called in svc_destroy(), but the pool map isn't used.
So that, the reference of pool map will be drop, the next using
of pool map will get a zero npools.
[ 137.992130] divide error: 0000 [#1] SMP
[ 137.992148] Modules linked in: nfsd(E) nfsv4 nfs fscache fuse tun bridge stp llc ip_set nfnetlink vmw_vsock_vmci_transport vsock snd_seq_midi snd_seq_midi_event vmw_balloon coretemp crct10dif_pclmul crc32_pclmul ppdev ghash_clmulni_intel intel_rapl_perf joydev snd_ens1371 gameport snd_ac97_codec ac97_bus snd_seq snd_pcm snd_rawmidi snd_timer snd_seq_device snd soundcore parport_pc parport nfit acpi_cpufreq tpm_tis tpm_tis_core tpm vmw_vmci i2c_piix4 shpchp auth_rpcgss nfs_acl lockd(E) grace sunrpc(E) xfs libcrc32c vmwgfx drm_kms_helper ttm crc32c_intel drm e1000 mptspi scsi_transport_spi serio_raw mptscsih mptbase ata_generic pata_acpi [last unloaded: nfsd]
[ 137.992336] CPU: 0 PID: 4514 Comm: rpc.nfsd Tainted: G E 4.11.0-rc8+ #536
[ 137.992777] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 137.993757] task:
ffff955984101d00 task.stack:
ffff9873c2604000
[ 137.994231] RIP: 0010:svc_pool_for_cpu+0x2b/0x80 [sunrpc]
[ 137.994768] RSP: 0018:
ffff9873c2607c18 EFLAGS:
00010246
[ 137.995227] RAX:
0000000000000000 RBX:
ffff95598376f000 RCX:
0000000000000002
[ 137.995673] RDX:
0000000000000000 RSI:
0000000000000000 RDI:
ffff9559944aec00
[ 137.996156] RBP:
ffff9873c2607c18 R08:
ffff9559944aec28 R09:
0000000000000000
[ 137.996609] R10:
0000000001080002 R11:
0000000000000000 R12:
ffff95598376f010
[ 137.997063] R13:
ffff95598376f018 R14:
ffff9559944aec28 R15:
ffff9559944aec00
[ 137.997584] FS:
00007f755529eb40(0000) GS:
ffff9559bb600000(0000) knlGS:
0000000000000000
[ 137.998048] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
[ 137.998548] CR2:
000055f3aecd9660 CR3:
0000000084290000 CR4:
00000000001406f0
[ 137.999052] Call Trace:
[ 137.999517] svc_xprt_do_enqueue+0xef/0x260 [sunrpc]
[ 138.000028] svc_xprt_received+0x47/0x90 [sunrpc]
[ 138.000487] svc_add_new_perm_xprt+0x76/0x90 [sunrpc]
[ 138.000981] svc_addsock+0x14b/0x200 [sunrpc]
[ 138.001424] ? recalc_sigpending+0x1b/0x50
[ 138.001860] ? __getnstimeofday64+0x41/0xd0
[ 138.002346] ? do_gettimeofday+0x29/0x90
[ 138.002779] write_ports+0x255/0x2c0 [nfsd]
[ 138.003202] ? _copy_from_user+0x4e/0x80
[ 138.003676] ? write_recoverydir+0x100/0x100 [nfsd]
[ 138.004098] nfsctl_transaction_write+0x48/0x80 [nfsd]
[ 138.004544] __vfs_write+0x37/0x160
[ 138.004982] ? selinux_file_permission+0xd7/0x110
[ 138.005401] ? security_file_permission+0x3b/0xc0
[ 138.005865] vfs_write+0xb5/0x1a0
[ 138.006267] SyS_write+0x55/0xc0
[ 138.006654] entry_SYSCALL_64_fastpath+0x1a/0xa9
[ 138.007071] RIP: 0033:0x7f7554b9dc30
[ 138.007437] RSP: 002b:
00007ffc9f92c788 EFLAGS:
00000246 ORIG_RAX:
0000000000000001
[ 138.007807] RAX:
ffffffffffffffda RBX:
0000000000000002 RCX:
00007f7554b9dc30
[ 138.008168] RDX:
0000000000000002 RSI:
00005640cd536640 RDI:
0000000000000003
[ 138.008573] RBP:
00007ffc9f92c780 R08:
0000000000000001 R09:
0000000000000002
[ 138.008918] R10:
0000000000000064 R11:
0000000000000246 R12:
0000000000000004
[ 138.009254] R13:
00005640cdbf77a0 R14:
00005640cdbf7720 R15:
00007ffc9f92c238
[ 138.009610] Code: 0f 1f 44 00 00 48 8b 87 98 00 00 00 55 48 89 e5 48 83 78 08 00 74 10 8b 05 07 42 02 00 83 f8 01 74 40 83 f8 02 74 19 31 c0 31 d2 <f7> b7 88 00 00 00 5d 89 d0 48 c1 e0 07 48 03 87 90 00 00 00 c3
[ 138.010664] RIP: svc_pool_for_cpu+0x2b/0x80 [sunrpc] RSP:
ffff9873c2607c18
[ 138.011061] ---[ end trace
b3468224cafa7d11 ]---
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
projects / kernel.git / commit