From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f71.google.com (mail-lf0-f71.google.com [209.85.215.71]) by kanga.kvack.org (Postfix) with ESMTP id 782776B0260 for ; Wed, 18 Jan 2017 00:59:43 -0500 (EST) Received: by mail-lf0-f71.google.com with SMTP id j90so1454539lfi.3 for ; Tue, 17 Jan 2017 21:59:43 -0800 (PST) Received: from smtp42.i.mail.ru (smtp42.i.mail.ru. [94.100.177.102]) by mx.google.com with ESMTPS id y9si17055449lja.67.2017.01.17.21.59.41 for (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 17 Jan 2017 21:59:41 -0800 (PST) Message-ID: <1484719121.25232.1.camel@list.ru> Subject: Re: [Bug 192571] zswap + zram enabled BUG From: Alexandr Date: Wed, 18 Jan 2017 08:58:41 +0300 In-Reply-To: <20170118013948.GA580@jagdpanzerIV.localdomain> References: <20170117122249.815342d95117c3f444acc952@linux-foundation.org> <20170118013948.GA580@jagdpanzerIV.localdomain> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: Sergey Senozhatsky Cc: Dan Streetman , Seth Jennings , Minchan Kim , bugzilla-daemon@bugzilla.kernel.org, linux-mm@kvack.org, Andrew Morton -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 D? D!N?, 18/01/2017 D2 10:39 +0900, Sergey Senozhatsky D?D,N?DuN?: > Cc Dan > > On (01/17/17 12:22), Andrew Morton wrote: > > > https://bugzilla.kernel.org/show_bug.cgi?id=192571 > > > > > > --- Comment #1 from Gluzskiy Alexandr --- > > > [199961.576604] ------------[ cut here ]------------ > > > [199961.577830] kernel BUG at mm/zswap.c:1108! > > zswap didn't manage to decompress the page: > > static int zswap_frontswap_load(unsigned type, pgoff_t offset, > struct page *page) > { > ... > dst = kmap_atomic(page); > tfm = *get_cpu_ptr(entry->pool->tfm); > ret = crypto_comp_decompress(tfm, src, entry->length, dst, > &dlen); > put_cpu_ptr(entry->pool->tfm); > kunmap_atomic(dst); > zpool_unmap_handle(entry->pool->zpool, entry->handle); > BUG_ON(ret); > ^^^^^^^^^^^ > > is there anything suspicious in dmesg? > > -ss > > [..] > > > [199961.596459] Hardware name: System manufacturer System Product > > > Name/M4A77TD, > > > BIOS 2104A A A A 06/28/2010 > > > [199961.597974] task: ffff880035c19680 task.stack: > > > ffffc90000510000 > > > [199961.599490] RIP: > > > 0010:[]A A [] > > > zswap_frontswap_load+0x142/0x160 > > > [199961.601042] RSP: 0000:ffffc90000513cb0A A EFLAGS: 00010282 > > > [199961.602588] RAX: ffffffff818263a0 RBX: ffff88036b2fb930 RCX: > > > ffffc90000513c98 > > > [199961.604141] RDX: ffff8801a75da000 RSI: ffff8802ee9d0240 RDI: > > > ffff88041c25d000 > > > [199961.605687] RBP: ffff880035c19680 R08: ffff8802ee9d0249 R09: > > > ffff8801a75da0ac > > > [199961.607240] R10: ffff8801a75db000 R11: ffff8802ee9d027d R12: > > > 00000000ffffffea > > > [199961.608788] R13: ffff8804176e3830 R14: ffff8804176e3838 R15: > > > 000000c42a6ac008 > > > [199961.610315] FS:A A 00007fe1fa7fc700(0000) > > > GS:ffff88042fc80000(0000) > > > knlGS:0000000000000000 > > > [199961.611838] CS:A A 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > > [199961.613357] CR2: 000000c42a6ac008 CR3: 00000000a8411000 CR4: > > > 00000000000006e0 > > > [199961.614864] Stack: > > > [199961.616327]A A 00001000fffffffe ffffffff81823780 > > > 000000000014487b > > > ffffea00069d7680 > > > [199961.617820]A A 0000000000000001 ffff880418614c00 > > > ffffffff8112b768 > > > ffffea00069d7680 > > > [199961.619310]A A ffff880418614c00 000000000014487b > > > 00000000024200ca > > > ffff88011d834900 > > > [199961.620799] Call Trace: > > > [199961.622250]A A [] ? > > > __frontswap_load+0x68/0xc0 > > > [199961.623689]A A [] ? swap_readpage+0x8c/0x120 > > > [199961.625115]A A [] ? > > > read_swap_cache_async+0x21/0x40 > > > [199961.626545]A A [] ? > > > swapin_readahead+0x116/0x1e0 > > > [199961.627973]A A [] ? > > > radix_tree_lookup_slot+0xe/0x20 > > > [199961.629398]A A [] ? do_swap_page+0x42f/0x660 > > > [199961.630799]A A [] ? > > > handle_mm_fault+0x76a/0x1080 > > > [199961.632163]A A [] ? new_sync_read+0xac/0xe0 > > > [199961.633496]A A [] ? > > > __do_page_fault+0x169/0x3e0 > > > [199961.634798]A A [] ? do_page_fault+0x1b/0x60 > > > [199961.636106]A A [] ? > > > __context_tracking_exit.part.1+0x49/0x60 > > > [199961.637424]A A [] ? page_fault+0x1f/0x30 > > > [199961.638739] Code: fb ff ff 41 c6 45 08 00 48 83 c4 08 44 89 > > > e0 5b 5d 41 5c > > > 41 5d 41 5e c3 be 0f 00 00 00 48 c7 c7 12 d6 6d 81 e8 e0 d2 f1 ff > > > eb b0 <0f> 0b > > > 0f 1f 84 00 00 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 66A > > > [199961.641538] RIPA A [] > > > zswap_frontswap_load+0x142/0x160 > > > [199961.642922]A A RSP > > > [199961.648971] ---[ end trace 76742a0cd4818a78 ]--- no, nothing interesting in dmesg. but i suspect what it may be because of usage zram and zswap together. i have following configuration: 1. boot option to kernel "ro radeon.audio=0 dma_debug=off reboot=warm gbpages rootfstype=ext4 rootflags=relatime,user_xattr,journal_async_commit,delalloc,nobarrier zswap.enabled=1" 2. zram activation in userspace: " cat /etc/local.d/zram.startA #!/bin/sh modprobe zram echo 10G > /sys/block/zram0/disksize mkswap /dev/zram0 swapon --priority 200 /dev/zram0 " 3. also i have normal swap block device as fall back if all memory used " swapon NAMEA A A A A A A A A A A A A TYPEA A A A A A SIZE USED PRIO /dev/mapper/swap partitionA A 16GA A A 0BA A A A 0 /dev/zram0A A A A A A A partitionA A 10GA A A 1GA A 200 " so, maybe problem related to zswap on zram ? just a guess... -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEl/sA7WQg6czXWI/dsEApXVthX7wFAlh/BBIACgkQsEApXVth X7w9lw/+O55XK/YZHszD/DMKRuZaaAQz7to/JrkJOCOJaYsV/PpUBh6liqYH8LCV 6vYaavzKt3ICW1qRa6Wjj7QC2YZKZTe8i8ERGTamDOnSu/gMlJz3EQ/uOEsNxde5 eoJr9n+JtUqf0PUUaMc61FcRbePcb3csQDD7KAwMSO7Q7+uP/osFUApjFVBOv0yd KggONcuyIlE0CIhmMk31Id+C7XoKeJogHa2qTIolGzi+yLCmiL+q+CujfXfrbOAz N6mDr7v6RTwzzOyXULZahceVxVtpUSgj84HG9wxTF7dwN6kwbW/YtdMu7UruqRyb SYHauUQSuEcbyb5m7tAPWfy4WsWaTacscdBCrOVqYJcn0nb945RMDz0RPIFZmLQS da6/zh67UF9KuSgprVakvgQ/ITJOfd96USlwZ+E8icJzT36IPWkSmFe6pNEa+KMn FiUf0JPN6ivO2q2wuwkIEKIeLiqDNX7QwcMxowMHKxezZobrzdyd4LoLx143mAa/ Ls0nABaN9bk+jzl3Ffl2Vx7YowuercwGaRzBuPEdxVQflA1gVPi7o/zwJ75CPAre ntQk8nWAqpxB30s0/++xYPbYaJFqWtXM2e4AQKQjiZSAdq34yl+q+di/1iGS/u4Q gfvGaprAtViK6AqURT8dXrWTv8KzAT2prIs3wdpmrc3V92p1cAo= =5ZmQ -----END PGP SIGNATURE----- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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