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Date: Thu, 17 Jul 2014 18:19:16 +0300 From: Timofey Titovets <nefelim4ag@...il.com> To: Jerome Marchand <jmarchan@...hat.com>, Sergey Senozhatsky <sergey.senozhatsky@...il.com> CC: minchan@...nel.org, linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, Nitin Gupta <ngupta@...are.org> Subject: Re: [PATCH v2] zram: auto add/del devices on demand On 07/17/2014 05:17 PM, Jerome Marchand wrote: > Looks like it: > > $ cat conctest.sh > #! /bin/sh > > modprobe zram > > while true; do > for i in `seq 1 10`; do > echo 10485760 > /sys/block/zram0/disksize& > echo 1 > /sys/block/zram0/reset& > done > done > $ sudo ./conctest.sh > > [ 51.535387] ------------[ cut here ]------------ > [ 51.536305] WARNING: CPU: 0 PID: 840 at fs/kernfs/dir.c:1209 > kernfs_remove_by_name_ns+0x95/0xa0() > [ 51.537908] kernfs: can not remove 'max_comp_streams', no directory > [ 51.539089] Modules linked in: zram lz4_compress xt_conntrack > cfg80211 rfkill ebtable_nat ebtable_broute bridge stp llc > ebtable_filter ebtables ip6_tables iptable_nat nf_conntrack_ipv4 > nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle > iptable_security iptable_raw ppdev crct10dif_pclmul crc32_pclmul > crc32c_intel joydev ghash_clmulni_intel microcode serio_raw pcspkr > virtio_balloon virtio_console parport_pc pvpanic virtio_net parport > floppy i2c_piix4 nfsd auth_rpcgss nfs_acl lockd sunrpc qxl > drm_kms_helper ttm virtio_blk drm virtio_pci virtio_ring virtio > ata_generic pata_acpi > [ 51.550844] CPU: 0 PID: 840 Comm: conc_init.sh Tainted: G D W > 3.16.0-rc5-memacct-next-20140715+ #146 > [ 51.552606] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 > [ 51.553691] 0000000000000009 ffff880078343d20 ffffffff8172d344 > ffff880078343d68 > [ 51.555412] ffff880078343d58 ffffffff8108ad1d 0000000000000000 > ffffffffa0320242 > [ 51.557811] ffffffffa0321058 0000000000000002 ffff880078343f50 > ffff880078343db8 > [ 51.559580] Call Trace: > [ 51.560139] [<ffffffff8172d344>] dump_stack+0x45/0x56 > [ 51.561161] [<ffffffff8108ad1d>] warn_slowpath_common+0x7d/0xa0 > [ 51.562333] [<ffffffff8108ad8c>] warn_slowpath_fmt+0x4c/0x50 > [ 51.563445] [<ffffffff81218196>] ? evict+0x106/0x170 > [ 51.564432] [<ffffffff81275695>] kernfs_remove_by_name_ns+0x95/0xa0 > [ 51.565627] [<ffffffff81277ee9>] remove_files.isra.1+0x39/0x70 > [ 51.566753] [<ffffffff812781f4>] sysfs_remove_group+0x44/0xa0 > [ 51.567870] [<ffffffffa031e058>] destroy_device.isra.17+0x28/0x50 > [zram] > [ 51.569089] [<ffffffffa031e5d0>] reset_store+0x100/0x140 [zram] > [ 51.570197] [<ffffffff8146c3e8>] dev_attr_store+0x18/0x30 > [ 51.571247] [<ffffffff81276fd4>] sysfs_kf_write+0x44/0x60 > [ 51.572201] [<ffffffff812768d7>] kernfs_fop_write+0xe7/0x170 > [ 51.573283] [<ffffffff811fbcf7>] vfs_write+0xb7/0x1f0 > [ 51.574143] [<ffffffff811fc8a9>] SyS_write+0x49/0xb0 > [ 51.574976] [<ffffffff8112e724>] ? __audit_syscall_entry+0xb4/0x110 > [ 51.576213] [<ffffffff817362a9>] system_call_fastpath+0x16/0x1b > [ 51.577422] ---[ end trace cdb79035dad379f3 ]--- > [ 51.578401] ------------[ cut here ]------------ > [ 51.579354] WARNING: CPU: 0 PID: 840 at fs/kernfs/dir.c:1209 > kernfs_remove_by_name_ns+0x95/0xa0() > [ 51.580966] kernfs: can not remove 'comp_algorithm', no directory > [ 51.582108] Modules linked in: zram lz4_compress xt_conntrack > cfg80211 rfkill ebtable_nat ebtable_broute bridge stp llc > ebtable_filter ebtables ip6_tables iptable_nat nf_conntrack_ipv4 > nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle > iptable_security iptable_raw ppdev crct10dif_pclmul crc32_pclmul > crc32c_intel joydev ghash_clmulni_intel microcode serio_raw pcspkr > virtio_balloon virtio_console parport_pc pvpanic virtio_net parport > floppy i2c_piix4 nfsd auth_rpcgss nfs_acl lockd sunrpc qxl > drm_kms_helper ttm virtio_blk drm virtio_pci virtio_ring virtio > ata_generic pata_acpi > [ 51.597177] CPU: 0 PID: 840 Comm: conc_init.sh Tainted: G D W > 3.16.0-rc5-memacct-next-20140715+ #146 > [ 51.598549] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 > [ 51.599661] 0000000000000009 ffff880078343d20 ffffffff8172d344 > ffff880078343d68 > [ 51.601519] ffff880078343d58 ffffffff8108ad1d 0000000000000000 > ffffffffa0320233 > [ 51.603362] ffffffffa0321058 0000000000000002 ffff880078343f50 > ffff880078343db8 > [ 51.604913] Call Trace: > [ 51.605444] [<ffffffff8172d344>] dump_stack+0x45/0x56 > [ 51.606537] [<ffffffff8108ad1d>] warn_slowpath_common+0x7d/0xa0 > [ 51.607507] [<ffffffff8108ad8c>] warn_slowpath_fmt+0x4c/0x50 > [ 51.608582] [<ffffffff81218196>] ? evict+0x106/0x170 > [ 51.609423] [<ffffffff81275695>] kernfs_remove_by_name_ns+0x95/0xa0 > [ 51.610436] [<ffffffff81277ee9>] remove_files.isra.1+0x39/0x70 > [ 51.611408] [<ffffffff812781f4>] sysfs_remove_group+0x44/0xa0 > [ 51.612431] [<ffffffffa031e058>] destroy_device.isra.17+0x28/0x50 > [zram] > [ 51.613214] [<ffffffffa031e5d0>] reset_store+0x100/0x140 [zram] > [ 51.613928] [<ffffffff8146c3e8>] dev_attr_store+0x18/0x30 > [ 51.614634] [<ffffffff81276fd4>] sysfs_kf_write+0x44/0x60 > [ 51.615387] [<ffffffff812768d7>] kernfs_fop_write+0xe7/0x170 > [ 51.616246] [<ffffffff811fbcf7>] vfs_write+0xb7/0x1f0 > [ 51.619107] [<ffffffff811fc8a9>] SyS_write+0x49/0xb0 > [ 51.620063] [<ffffffff8112e724>] ? __audit_syscall_entry+0xb4/0x110 > [ 51.622071] [<ffffffff817362a9>] system_call_fastpath+0x16/0x1b > [ 51.623256] ---[ end trace cdb79035dad379f4 ]--- > > And lots more of similar messages. > > Jerome > Thanks for catching, i try fix it and resend patch. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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