Re: [PATCH v2 0/8] mm/swap: Regular page swap optimizations

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On s390 4.9-rc1 + this patch set
I get the following on swapon

[  308.206195] ------------[ cut here ]------------
[  308.206203] WARNING: CPU: 5 PID: 20745 at mm/page_alloc.c:3511 __alloc_pages_nodemask+0x884/0xdf8
[  308.206205] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter btrfs raid6_pq xor dm_service_time ghash_s390 prng aes_s390 des_s390 des_generic qeth_l2 sha512_s390 sha256_s390 sha1_s390 sha_common nfsd eadm_sch auth_rpcgss qeth ccwgroup oid_registry nfs_acl lockd grace vhost_net vhost sunrpc macvtap macvlan kvm sch_fq_codel dm_multipath ip_tables
[  308.206240] CPU: 5 PID: 20745 Comm: swapon Tainted: G        W       4.9.0-rc1+ #23
[  308.206241] Hardware name: IBM              2964 NC9              704              (LPAR)
[  308.206243] task: 00000000e3bb8000 task.stack: 00000000d4270000
[  308.206244] Krnl PSW : 0704c00180000000 000000000025db3c
[  308.206246]  (__alloc_pages_nodemask+0x884/0xdf8)

[  308.206248]            R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0
[  308.206250]  RI:0 EA:3
[  308.206251] 
               Krnl GPRS: 000000000000000a 0000000000b2b0ec 0000000100000312 0000000000000001
[  308.206267]            000000000025d3ec 0000000000000008 0000000000000075 000000000240c0c0
[  308.206269]            0000000000000001 0000000000000000 000000000000000a 0000000000000000
[  308.206270]            000000000000000a 000000000079d8c8 000000000025d3ec 00000000d4273ba0
[  308.206280] Krnl Code: 000000000025db30: a774fd27		brc	7,25d57e
[  308.206282] 
                          000000000025db34: 92011000		mvi	0(%r1),1
[  308.206285] 
                         #000000000025db38: a7f40001		brc	15,25db3a
[  308.206286] 
                         >000000000025db3c: a7f4fd21		brc	15,25d57e
[  308.206289] 
                          000000000025db40: 4130f150		la	%r3,336(%r15)
[  308.206291] 
                          000000000025db44: b904002c		lgr	%r2,%r12
[  308.206293] 
                          000000000025db48: c0e5ffffe11c	brasl	%r14,259d80
[  308.206294] 
                          000000000025db4e: a7f4fda3		brc	15,25d694
[  308.206297] Call Trace:
[  308.206299] ([<000000000025d3ec>] __alloc_pages_nodemask+0x134/0xdf8)
[  308.206303] ([<0000000000280d6a>] kmalloc_order+0x42/0x70)
[  308.206305] ([<0000000000280dd8>] kmalloc_order_trace+0x40/0xf0)
[  308.206310] ([<00000000002a7090>] init_swap_address_space+0x68/0x138)
[  308.206312] ([<00000000002ac858>] SyS_swapon+0xbd0/0xf80)
[  308.206317] ([<0000000000785476>] system_call+0xd6/0x264)
[  308.206318] Last Breaking-Event-Address:
[  308.206319]  [<000000000025db38>] __alloc_pages_nodemask+0x880/0xdf8
[  308.206320] ---[ end trace aaeca736f47ac05b ]---

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