From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f199.google.com (mail-qk0-f199.google.com [209.85.220.199]) by kanga.kvack.org (Postfix) with ESMTP id 7F8EA6B0005 for ; Mon, 1 Aug 2016 05:08:27 -0400 (EDT) Received: by mail-qk0-f199.google.com with SMTP id v184so240790006qkc.0 for ; Mon, 01 Aug 2016 02:08:27 -0700 (PDT) Received: from mail-qk0-x233.google.com (mail-qk0-x233.google.com. [2607:f8b0:400d:c09::233]) by mx.google.com with ESMTPS id u32si19448105qtb.52.2016.08.01.02.08.26 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 01 Aug 2016 02:08:26 -0700 (PDT) Received: by mail-qk0-x233.google.com with SMTP id v123so7057201qkh.3 for ; Mon, 01 Aug 2016 02:08:26 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <2f8a65db-e5a8-75f0-8c08-daa41e1cd3ba@mejor.pl> References: <2f8a65db-e5a8-75f0-8c08-daa41e1cd3ba@mejor.pl> From: Vitaly Wool Date: Mon, 1 Aug 2016 11:08:25 +0200 Message-ID: Subject: Re: Choosing z3fold allocator in zswap gives WARNING: CPU: 0 PID: 5140 at mm/zswap.c:503 __zswap_pool_current+0x56/0x60 Content-Type: multipart/alternative; boundary=001a11490c5862a8cd0538fef14c Sender: owner-linux-mm@kvack.org List-ID: To: =?UTF-8?Q?Marcin_Miros=C5=82aw?= Cc: Linux-MM --001a11490c5862a8cd0538fef14c Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Marcin, Den 1 aug. 2016 11:04 fm skrev "Marcin Miros=C5=82aw" : > > Hi! > I'm testing kernel-git > (git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git , at > 07f00f06ba9a5533d6650d46d3e938f6cbeee97e ) because I noticed strange OOM > behavior in kernel 4.7.0. As for now I can't reproduce problems with > OOM, probably it's fixed now. > But now I wanted to try z3fold with zswap. When I did `echo z3fold > > /sys/module/zswap/parameters/zpool` I got trace from dmesg: Could you please give more info on how to reproduce this? ~vitaly > > [ 429.722411] ------------[ cut here ]------------ > [ 429.723476] WARNING: CPU: 0 PID: 5140 at mm/zswap.c:503 > __zswap_pool_current+0x56/0x60 > [ 429.725161] Modules linked in: z3fold tun algif_skcipher af_alg > dm_crypt netconsole xt_policy ipt_REJECT nf_reject_ipv4 xt_TARPIT(OE) > xt_NFLOG ip_set_hash_ip ip_set_hash_net xt_SYSRQ(OE) xt_multiport > nfnetlink_queue sit ip_tunnel tunnel4 xt_set ip_set iptable_filter > xt_nat xt_comment xt_length iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 > nf_nat_ipv4 nf_nat iptable_mangle xt_CT iptable_raw ip_tables > nf_conntrack_ipv6 nf_defrag_ipv6 ip6t_rt xt_conntrack nf_conntrack > ip6table_filter ip6table_mangle ip6_tables ipv6 xfs libcrc32c btrfs xor > zlib_deflate raid6_pq tcp_diag inet_diag aesni_intel aes_x86_64 > glue_helper lrw gf128mul ablk_helper cryptd button virtio_net > virtio_balloon crc32c_intel > [ 429.738937] CPU: 0 PID: 5140 Comm: bash Tainted: G OE > 4.7.0+ #4 > [ 429.739880] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007 > [ 429.740048] 0000000000000286 000000002ea2eeca ffff8ecca91efcd8 > ffffffffad255d43 > [ 429.740048] 0000000000000000 0000000000000000 ffff8ecca91efd18 > ffffffffad04c997 > [ 429.740048] 000001f700000003 ffffffffad9b8a58 ffff8eccbd162b58 > 0000000000000000 > [ 429.740048] Call Trace: > [ 429.740048] [] dump_stack+0x63/0x90 > [ 429.740048] [] __warn+0xc7/0xf0 > [ 429.740048] [] warn_slowpath_null+0x18/0x20 > [ 429.740048] [] __zswap_pool_current+0x56/0x60 > [ 429.740048] [] zswap_pool_current+0x13/0x20 > [ 429.740048] [] __zswap_param_set+0x1db/0x2f0 > [ 429.740048] [] zswap_zpool_param_set+0x12/0x20 > [ 429.740048] [] param_attr_store+0x5f/0xc0 > [ 429.740048] [] module_attr_store+0x19/0x30 > [ 429.740048] [] sysfs_kf_write+0x32/0x40 > [ 429.740048] [] kernfs_fop_write+0x113/0x190 > [ 429.740048] [] __vfs_write+0x32/0x150 > [ 429.740048] [] ? __fd_install+0x2e/0xe0 > [ 429.740048] [] ? __alloc_fd+0x41/0x180 > [ 429.740048] [] ? percpu_down_read+0xd/0x50 > [ 429.740048] [] vfs_write+0xb3/0x1a0 > [ 429.740048] [] ? filp_close+0x51/0x70 > [ 429.740048] [] SyS_write+0x50/0xc0 > [ 429.740048] [] entry_SYSCALL_64_fastpath+0x1e/0xa8 > [ 429.764069] ---[ end trace ff7835fbf4d983b9 ]--- > > > Second issue: > Since 4.7.0 up to now I've got strange problem with starting BIND (dns). > It can't start, throws: > 2016-08-01T10:42:21.449188+02:00 jowisz named[3730]: listening on IPv4 > interface eth0, 81.4.122.249#53 > 2016-08-01T10:42:21.449412+02:00 jowisz named[3730]: could not listen on > UDP socket: out of memory > 2016-08-01T10:42:21.449455+02:00 jowisz named[3730]: creating IPv4 > interface eth0 failed; interface ignored > 2016-08-01T10:42:21.449514+02:00 jowisz named[3730]: not listening on > any interfaces > 2016-08-01T10:42:21.449670+02:00 jowisz named[3730]: generating session > key for dynamic DNS > 2016-08-01T10:42:21.449910+02:00 jowisz named[3730]: sizing zone task > pool based on 69 zones > 2016-08-01T10:42:21.450094+02:00 jowisz named[3730]: dns_master_load: > out of memory > 2016-08-01T10:42:21.450668+02:00 jowisz named[3730]: could not configure > root hints from 'named.cache': out of memory > 2016-08-01T10:42:21.451236+02:00 jowisz named[3730]: additionally > listening on IPv4 interface eth0, 81.4.122.249#53 > 2016-08-01T10:42:21.451298+02:00 jowisz named[3730]: could not listen on > UDP socket: out of memory > 2016-08-01T10:42:21.451342+02:00 jowisz named[3730]: creating IPv4 > interface eth0 failed; interface ignored > 2016-08-01T10:42:21.451479+02:00 jowisz named[3730]: loading > configuration: out of memory > 2016-08-01T10:42:21.451515+02:00 jowisz named[3730]: exiting (due to > fatal error) > > strace shows: > [pid 26247] sendto(3, "<29>Aug 1 11:02:23 named[26230]"..., 80, > MSG_NOSIGNAL, NULL, 0) =3D 80 > [pid 26247] mprotect(0x7f8828051000, 8192, PROT_READ|PROT_WRITE) =3D -1 > ENOMEM (Cannot allocate memory) > [pid 26247] mmap(NULL, 134217728, PROT_NONE, > MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) =3D 0x7f8820000000 > [pid 26247] munmap(0x7f8824000000, 67108864) =3D 0 > [pid 26247] mprotect(0x7f8820000000, 143360, PROT_READ|PROT_WRITE) =3D -1 > ENOMEM (Cannot allocate memory) > [pid 26247] munmap(0x7f8820000000, 67108864) =3D 0 > [pid 26247] mmap(NULL, 12288, PROT_READ|PROT_WRITE, > MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =3D -1 ENOMEM (Cannot allocate memory) > [pid 26247] mprotect(0x7f8828051000, 8192, PROT_READ|PROT_WRITE) =3D -1 > ENOMEM (Cannot allocate memory) > [pid 26247] mmap(0x7f8824000000, 67108864, PROT_NONE, > MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) =3D 0x7f8824000000 > [pid 26247] mprotect(0x7f8824000000, 143360, PROT_READ|PROT_WRITE) =3D -1 > ENOMEM (Cannot allocate memory) > [pid 26247] munmap(0x7f8824000000, 67108864) =3D 0 > > > Thanks, > Marcin --001a11490c5862a8cd0538fef14c Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Hi Marcin,

Den 1 aug. 2016 11:04 fm skrev "Marcin Miros=C5=82aw&qu= ot; <marcin@mejor.pl>:
>
> Hi!
> I'm testing kernel-git
> (git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git , at
> 07f00f06ba9a5533d6650d46d3e938f6cbeee97e ) because I noticed strange O= OM
> behavior in kernel 4.7.0. As for now I can't reproduce problems wi= th
> OOM, probably it's fixed now.
> But now I wanted to try z3fold with zswap. When I did `echo z3fold >= ;
> /sys/module/zswap/parameters/zpool` I got trace from dmesg:

Could you please give more info on how to reproduce this?

~vitaly

>
> [=C2=A0 429.722411] ------------[ cut here ]------------
> [=C2=A0 429.723476] WARNING: CPU: 0 PID: 5140 at mm/zswap.c:503
> __zswap_pool_current+0x56/0x60
> [=C2=A0 429.725161] Modules linked in: z3fold tun algif_skcipher af_al= g
> dm_crypt netconsole xt_policy ipt_REJECT nf_reject_ipv4 xt_TARPIT(OE)<= br> > xt_NFLOG ip_set_hash_ip ip_set_hash_net xt_SYSRQ(OE) xt_multiport
> nfnetlink_queue sit ip_tunnel tunnel4 xt_set ip_set iptable_filter
> xt_nat xt_comment xt_length iptable_nat nf_conntrack_ipv4 nf_defrag_ip= v4
> nf_nat_ipv4 nf_nat iptable_mangle xt_CT iptable_raw ip_tables
> nf_conntrack_ipv6 nf_defrag_ipv6 ip6t_rt xt_conntrack nf_conntrack
> ip6table_filter ip6table_mangle ip6_tables ipv6 xfs libcrc32c btrfs xo= r
> zlib_deflate raid6_pq tcp_diag inet_diag aesni_intel aes_x86_64
> glue_helper lrw gf128mul ablk_helper cryptd button virtio_net
> virtio_balloon crc32c_intel
> [=C2=A0 429.738937] CPU: 0 PID: 5140 Comm: bash Tainted: G=C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0OE
> 4.7.0+ #4
> [=C2=A0 429.739880] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007<= br> > [=C2=A0 429.740048]=C2=A0 0000000000000286 000000002ea2eeca ffff8ecca9= 1efcd8
> ffffffffad255d43
> [=C2=A0 429.740048]=C2=A0 0000000000000000 0000000000000000 ffff8ecca9= 1efd18
> ffffffffad04c997
> [=C2=A0 429.740048]=C2=A0 000001f700000003 ffffffffad9b8a58 ffff8eccbd= 162b58
> 0000000000000000
> [=C2=A0 429.740048] Call Trace:
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad255d43>] dump_stack+0x63/0= x90
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad04c997>] __warn+0xc7/0xf0<= br> > [=C2=A0 429.740048]=C2=A0 [<ffffffffad04cac8>] warn_slowpath_nul= l+0x18/0x20
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad1250c6>] __zswap_pool_curr= ent+0x56/0x60
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad1250e3>] zswap_pool_curren= t+0x13/0x20
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad125efb>] __zswap_param_set= +0x1db/0x2f0
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad126042>] zswap_zpool_param= _set+0x12/0x20
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad06645f>] param_attr_store+= 0x5f/0xc0
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad065b69>] module_attr_store= +0x19/0x30
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad1b0b02>] sysfs_kf_write+0x= 32/0x40
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad1b0663>] kernfs_fop_write+= 0x113/0x190
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad13fc52>] __vfs_write+0x32/= 0x150
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad15f0ae>] ? __fd_install+0x= 2e/0xe0
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad15ef11>] ? __alloc_fd+0x41= /0x180
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad0838dd>] ? percpu_down_rea= d+0xd/0x50
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad140d33>] vfs_write+0xb3/0x= 1a0
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad13db81>] ? filp_close+0x51= /0x70
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad142140>] SyS_write+0x50/0x= c0
> [=C2=A0 429.740048]=C2=A0 [<ffffffffad413836>] entry_SYSCALL_64_= fastpath+0x1e/0xa8
> [=C2=A0 429.764069] ---[ end trace ff7835fbf4d983b9 ]---
>
>
> Second issue:
> Since 4.7.0 up to now I've got strange problem with starting BIND = (dns).
> It can't start, throws:
> 2016-08-01T10:42:21.449188+02:00 jowisz named[3730]: listening on IPv4=
> interface eth0, 81.4.122.249#53
> 2016-08-01T10:42:21.449412+02:00 jowisz named[3730]: could not listen = on
> UDP socket: out of memory
> 2016-08-01T10:42:21.449455+02:00 jowisz named[3730]: creating IPv4
> interface eth0 failed; interface ignored
> 2016-08-01T10:42:21.449514+02:00 jowisz named[3730]: not listening on<= br> > any interfaces
> 2016-08-01T10:42:21.449670+02:00 jowisz named[3730]: generating sessio= n
> key for dynamic DNS
> 2016-08-01T10:42:21.449910+02:00 jowisz named[3730]: sizing zone task<= br> > pool based on 69 zones
> 2016-08-01T10:42:21.450094+02:00 jowisz named[3730]: dns_master_load:<= br> > out of memory
> 2016-08-01T10:42:21.450668+02:00 jowisz named[3730]: could not configu= re
> root hints from 'named.cache': out of memory
> 2016-08-01T10:42:21.451236+02:00 jowisz named[3730]: additionally
> listening on IPv4 interface eth0, 81.4.122.249#53
> 2016-08-01T10:42:21.451298+02:00 jowisz named[3730]: could not listen = on
> UDP socket: out of memory
> 2016-08-01T10:42:21.451342+02:00 jowisz named[3730]: creating IPv4
> interface eth0 failed; interface ignored
> 2016-08-01T10:42:21.451479+02:00 jowisz named[3730]: loading
> configuration: out of memory
> 2016-08-01T10:42:21.451515+02:00 jowisz named[3730]: exiting (due to > fatal error)
>
> strace shows:
> [pid 26247] sendto(3, "<29>Aug=C2=A0 1 11:02:23 named[26230= ]"..., 80,
> MSG_NOSIGNAL, NULL, 0) =3D 80
> [pid 26247] mprotect(0x7f8828051000, 8192, PROT_READ|PROT_WRITE) =3D -= 1
> ENOMEM (Cannot allocate memory)
> [pid 26247] mmap(NULL, 134217728, PROT_NONE,
> MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) =3D 0x7f8820000000
> [pid 26247] munmap(0x7f8824000000, 67108864) =3D 0
> [pid 26247] mprotect(0x7f8820000000, 143360, PROT_READ|PROT_WRITE) =3D= -1
> ENOMEM (Cannot allocate memory)
> [pid 26247] munmap(0x7f8820000000, 67108864) =3D 0
> [pid 26247] mmap(NULL, 12288, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =3D -1 ENOMEM (Cannot allocate memor= y)
> [pid 26247] mprotect(0x7f8828051000, 8192, PROT_READ|PROT_WRITE) =3D -= 1
> ENOMEM (Cannot allocate memory)
> [pid 26247] mmap(0x7f8824000000, 67108864, PROT_NONE,
> MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) =3D 0x7f8824000000
> [pid 26247] mprotect(0x7f8824000000, 143360, PROT_READ|PROT_WRITE) =3D= -1
> ENOMEM (Cannot allocate memory)
> [pid 26247] munmap(0x7f8824000000, 67108864) =3D 0
>
>
> Thanks,
> Marcin

--001a11490c5862a8cd0538fef14c-- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org