[Intel-gfx] memcontrol.c BUG

Chris Wilson chris at chris-wilson.co.uk
Wed Jan 28 00:48:52 PST 2015 

On Wed, Jan 28, 2015 at 08:13:06AM +1000, Dave Airlie wrote:
> https://bugzilla.redhat.com/show_bug.cgi?id=1165369
> 
> ov 18 09:23:22 elissa.gathman.org kernel: page:f5e36a40 count:2
> mapcount:0 mapping:  (null) index:0x0
> Nov 18 09:23:22 elissa.gathman.org kernel: page flags:
> 0x80090029(locked|uptodate|lru|swapcache|swapbacked)
> Nov 18 09:23:22 elissa.gathman.org kernel: page dumped because:
> VM_BUG_ON_PAGE(!lrucare && PageLRU(oldpage))
> Nov 18 09:23:23 elissa.gathman.org kernel: ------------[ cut here ]------------
> Nov 18 09:23:23 elissa.gathman.org kernel: kernel BUG at mm/memcontrol.c:6733!
> Nov 18 09:23:23 elissa.gathman.org kernel: invalid opcode: 0000 [#1] SMP
> Nov 18 09:23:23 elissa.gathman.org kernel: Modules linked in: tcp_lp
> vfat fat fuse tun ccm bnep bluetooth ip6t_rpfilter ip6t_REJECT
> xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter
> ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6
> ip6table_mangle ip6table_security ip6table_raw ip6table_filter
> ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4
> nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw
> snd_hda_codec_idt snd_hda_codec_hdmi snd_hda_codec_generic mmc_block
> snd_hda_intel snd_hda_controller iTCO_wdt snd_hda_codec
> iTCO_vendor_support dell_wmi sdhci_pci gpio_ich sparse_keymap arc4
> joydev iwl3945 snd_hwdep serio_raw sdhci snd_seq dell_laptop iwlegacy
> dcdbas mac80211 coretemp i2c_i801 r592 mmc_core snd_seq_device snd_pcm
> cfg80211 memstick rfkill snd_timer lpc_ich
> Nov 18 09:23:23 elissa.gathman.org kernel:  snd soundcore wmi
> acpi_cpufreq hid_logitech_dj firewire_ohci firewire_core ata_generic
> i915 pata_acpi crc_itu_t i2c_algo_bit sky2 drm_kms_helper drm video
> Nov 18 09:23:23 elissa.gathman.org kernel: CPU: 0 PID: 966 Comm: Xorg
> Tainted: G        W      3.17.2-200.fc20.i686 #1
> Nov 18 09:23:23 elissa.gathman.org kernel: Hardware name: Dell Inc.
> Inspiron 1525                   /0U990C, BIOS A16 10/16/2008
> Nov 18 09:23:24 elissa.gathman.org kernel: task: e88adf80 ti: e88a2000
> task.ti: e88a2000
> Nov 18 09:23:24 elissa.gathman.org kernel: EIP: 0060:[<c05763ab>]
> EFLAGS: 00013282 CPU: 0
> Nov 18 09:23:24 elissa.gathman.org kernel: EIP is at
> mem_cgroup_migrate+0x14b/0x180
> Nov 18 09:23:24 elissa.gathman.org kernel: EAX: 00000000 EBX: f54eec40
> ECX: f73d8ac8 EDX: 00000000
> Nov 18 09:23:24 elissa.gathman.org kernel: ESI: f5e36a40 EDI: c0cd3a40
> EBP: e88a3b9c ESP: e88a3b84
> Nov 18 09:23:24 elissa.gathman.org kernel:  DS: 007b ES: 007b FS: 00d8
> GS: 00e0 SS: 0068
> Nov 18 09:23:24 elissa.gathman.org kernel: CR0: 80050033 CR2: b69e6000
> CR3: 2f3ab000 CR4: 000007d0
> Nov 18 09:23:24 elissa.gathman.org kernel: Stack:
> Nov 18 09:23:24 elissa.gathman.org kernel:  c0d215c0 f54eec40 2a278f72
> f54eec40 00000000 c0cd3a40 e88a3bc8 c053d71b
> Nov 18 09:23:24 elissa.gathman.org kernel:  f54eec40 e88a3c20 00008537
> fffba000 c0cd3a40 f5e36a40 00008537 ef3df828
> Nov 18 09:23:24 elissa.gathman.org kernel:  ffffffef e88a3c34 c053db59
> e88a3c04 000214de ef3df8f8 e88adf80 e88a3c48
> Nov 18 09:23:24 elissa.gathman.org kernel: Call Trace:
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c053d71b>]
> shmem_replace_page.isra.28+0x11b/0x200
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c053db59>]
> shmem_getpage_gfp+0x239/0x770
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c053e15f>]
> shmem_read_mapping_page_gfp+0x3f/0x70
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c06cd870>] ? sg_kfree+0x30/0x30
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f61be1>]
> i915_gem_object_get_pages_gtt+0x141/0x2c0 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c0409f50>] ?
> nommu_map_sg+0x40/0xb0
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c07a8c92>] ?
> intel_gtt_insert_sg_entries+0x72/0xa0
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f5df66>]
> i915_gem_object_get_pages+0x66/0xa0 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f621ed>]
> i915_gem_object_pin+0x3ed/0x6e0 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f57665>]
> i915_gem_execbuffer_reserve_vma.isra.11+0x75/0x130 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f579c5>]
> i915_gem_execbuffer_reserve+0x2a5/0x2d0 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f582ae>]
> i915_gem_do_execbuffer.isra.18+0x51e/0x11d0 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f6363c>] ?
> i915_gem_object_set_to_gtt_domain+0xfc/0x1b0 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f639f5>] ?
> i915_gem_object_ggtt_unpin+0x15/0x90 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f59499>] ?
> i915_gem_execbuffer2+0x59/0x2b0 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f594cb>]
> i915_gem_execbuffer2+0x8b/0x2b0 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f59440>] ?
> i915_gem_execbuffer+0x4e0/0x4e0 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7e062bf>]
> drm_ioctl+0x1cf/0x520 [drm]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7f59440>] ?
> i915_gem_execbuffer+0x4e0/0x4e0 [i915]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c06c5790>] ?
> timerqueue_add+0x50/0xb0
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c04b1515>] ? ktime_get+0x45/0xe0
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<f7e060f0>] ?
> drm_copy_field+0x70/0x70 [drm]
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c058df5a>]
> do_vfs_ioctl+0x2ea/0x4b0
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c065cc72>] ?
> inode_has_perm.isra.32+0x32/0x40
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c065cdc7>] ?
> file_has_perm+0x97/0xa0
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c065d83c>] ?
> selinux_file_ioctl+0x4c/0xf0
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c058e180>] SyS_ioctl+0x60/0x90
> Nov 18 09:23:25 elissa.gathman.org kernel:  [<c0a1ea9f>]
> sysenter_do_call+0x12/0x12
> Nov 18 09:23:25 elissa.gathman.org kernel: Code: f3 bd c0 89 d8 e8 b6
> 79 fb ff 0f 0b ba 18 f3 bd c0 89 f0 e8 a8 79 fb ff 0f 0b e8 01 cb ed
> ff ba 4c fc bd c0 89 f0 e8 95 79 fb ff <0f> 0b a8 04 0f 85 60 ff ff ff
> ba 0c fd bd c0 89 f0 e8 7f 79 fb
> Nov 18 09:23:25 elissa.gathman.org kernel: EIP: [<c05763ab>]
> mem_cgroup_migrate+0x14b/0x180 SS:ESP 0068:e88a3b84
> Nov 18 09:23:25 elissa.gathman.org kernel: ---[ end trace 9aaca320302a6e84 ]---
> 
> discuss, 965GM I believe.

965GM and that it uniquely uses

mask = GFP_HIGHUSER | __GFP_RECLAIMABLE;
if (IS_CRESTLINE(dev) || IS_BROADWATER(dev)) {
	/* 965gm cannot relocate objects above 4GiB. */
	mask &= ~__GFP_HIGHMEM;
	mask |= __GFP_DMA32;
}

for its shmemfs gfp mask.

I think we decided that

commit 0a31bc97c80c3fa87b32c091d9a930ac19cd0c40
Author: Johannes Weiner <hannes at cmpxchg.org>
Date:   Fri Aug 8 14:19:22 2014 -0700

    mm: memcontrol: rewrite uncharge API

was the likely candidate (given that it was the only change to
mm/shmemfs.c in the regresssing time frame).
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre

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