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Trigger Huang f9723569b0 drm/scheduler: Fix bad job be re-processed in TDR 
[ Upstream commit 85744e9c10 ]

A bad job is the one triggered TDR(In the current amdgpu's
implementation, actually all the jobs in the current joq-queue will
be treated as bad jobs). In the recovery process, its fence
will be fake signaled and as a result, the work behind will be scheduled
to delete it from the mirror list, but if the TDR process is invoked
before the work's execution, then this bad job might be processed again
and the call dma_fence_set_error to its fence in TDR process will lead to
kernel warning trace:

[  143.033605] WARNING: CPU: 2 PID: 53 at ./include/linux/dma-fence.h:437 amddrm_sched_job_recovery+0x1af/0x1c0 [amd_sched]
kernel: [  143.033606] Modules linked in: amdgpu(OE) amdchash(OE) amdttm(OE) amd_sched(OE) amdkcl(OE) amd_iommu_v2 drm_kms_helper drm i2c_algo_bit fb_sys_fops syscopyarea sysfillrect sysimgblt kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel aes_x86_64 snd_hda_codec_generic crypto_simd glue_helper cryptd snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq joydev snd_seq_device snd_timer snd soundcore binfmt_misc input_leds mac_hid serio_raw nfsd auth_rpcgss nfs_acl lockd grace sunrpc sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 8139too floppy psmouse 8139cp mii i2c_piix4 pata_acpi
[  143.033649] CPU: 2 PID: 53 Comm: kworker/2:1 Tainted: G           OE    4.15.0-20-generic #21-Ubuntu
[  143.033650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[  143.033653] Workqueue: events drm_sched_job_timedout [amd_sched]
[  143.033656] RIP: 0010:amddrm_sched_job_recovery+0x1af/0x1c0 [amd_sched]
[  143.033657] RSP: 0018:ffffa9f880fe7d48 EFLAGS: 00010202
[  143.033659] RAX: 0000000000000007 RBX: ffff9b98f2b24c00 RCX: ffff9b98efef4f08
[  143.033660] RDX: ffff9b98f2b27400 RSI: ffff9b98f2b24c50 RDI: ffff9b98efef4f18
[  143.033660] RBP: ffffa9f880fe7d98 R08: 0000000000000001 R09: 00000000000002b6
[  143.033661] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9b98efef3430
[  143.033662] R13: ffff9b98efef4d80 R14: ffff9b98efef4e98 R15: ffff9b98eaf91c00
[  143.033663] FS:  0000000000000000(0000) GS:ffff9b98ffd00000(0000) knlGS:0000000000000000
[  143.033664] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  143.033665] CR2: 00007fc49c96d470 CR3: 000000001400a005 CR4: 00000000003606e0
[  143.033669] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  143.033669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  143.033670] Call Trace:
[  143.033744]  amdgpu_device_gpu_recover+0x144/0x820 [amdgpu]
[  143.033788]  amdgpu_job_timedout+0x9b/0xa0 [amdgpu]
[  143.033791]  drm_sched_job_timedout+0xcc/0x150 [amd_sched]
[  143.033795]  process_one_work+0x1de/0x410
[  143.033797]  worker_thread+0x32/0x410
[  143.033799]  kthread+0x121/0x140
[  143.033801]  ? process_one_work+0x410/0x410
[  143.033803]  ? kthread_create_worker_on_cpu+0x70/0x70
[  143.033806]  ret_from_fork+0x35/0x40

So just delete the bad job from mirror list directly

Changes in v3:
	- Add a helper function to delete the bad jobs from mirror list and call
		it directly *before* the job's fence is signaled

Changes in v2:
	- delete the useless list node check
	- also delete bad jobs in drm_sched_main because:
		kthread_unpark(ring->sched.thread) will be invoked very early before
		amdgpu_device_gpu_recover's return, then drm_sched_main will have
		chance to pick up a new job from the job queue. This new job will be
		added into the mirror list and processed by amdgpu_job_run, but may
		not be deleted from the mirror list on time due to the same reason.
		And finally re-processed by drm_sched_job_recovery

Signed-off-by: Trigger Huang <Trigger.Huang@amd.com>
Reviewed-by: Christian König <chrstian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2019-01-26 09:20:41 +01:00
arch MIPS: SiByte: Enable swiotlb for SWARM, LittleSur and BigSur 2019-01-26 09:20:41 +01:00
block block: use rcu_work instead of call_rcu to avoid sleep in softirq 2019-01-22 21:09:57 +01:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto crypto: ecc - regularize scalar for scalar multiplication 2019-01-26 09:20:41 +01:00
Documentation x86/speculation/l1tf: Drop the swap storage limit restriction when l1tf=off 2019-01-09 17:45:54 +01:00
drivers drm/scheduler: Fix bad job be re-processed in TDR 2019-01-26 09:20:41 +01:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs blockdev: Fix livelocks on loop device 2019-01-22 21:09:57 +01:00
include bpf: Allow narrow loads with offset > 0 2019-01-26 09:20:40 +01:00
init kbuild: Disable LD_DEAD_CODE_DATA_ELIMINATION with ftrace & GCC <= 4.7 2019-01-22 21:09:54 +01:00
ipc ipc: IPCMNI limit check for semmni 2018-10-31 08:54:14 -07:00
kernel bpf: Allow narrow loads with offset > 0 2019-01-26 09:20:40 +01:00
lib fix int_sqrt64() for very large numbers 2019-01-22 21:09:55 +01:00
LICENSES This is a fairly typical cycle for documentation. There's some welcome 2018-10-24 18:01:11 +01:00
mm mm: page_mapped: don't assume compound page is huge or THP 2019-01-16 22:03:26 +01:00
net netfilter: ipset: Allow matching on destination MAC address for mac and ipmac sets 2019-01-26 09:20:39 +01:00
samples VFIO updates for v4.20 2018-10-31 11:01:38 -07:00
scripts x86, modpost: Replace last remnants of RETPOLINE with CONFIG_RETPOLINE 2019-01-16 22:03:21 +01:00
security selinux: fix GPF on invalid policy 2019-01-22 21:09:57 +01:00
sound ALSA: oxfw: add support for APOGEE duet FireWire 2019-01-26 09:20:41 +01:00
tools selftests/bpf: enable (uncomment) all tests in test_libbpf.sh 2019-01-26 09:20:40 +01:00
usr initramfs: move gen_initramfs_list.sh from scripts/ to usr/ 2018-08-22 23:21:44 +09:00
virt KVM: arm/arm64: vgic: Fix off-by-one bug in vgic_get_irq() 2019-01-09 17:46:04 +01:00
.clang-format page cache: Convert find_get_pages_contig to XArray 2018-10-21 10:46:34 -04:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Add hch to .get_maintainer.ignore 2015-08-21 14:30:10 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap mailmap: Update email for Punit Agrawal 2018-11-05 10:02:11 +00:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS MAINTAINERS: update entry for MMP platform 2018-12-03 12:39:57 -08:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-21 14:21:17 -08:00
Makefile Linux 4.20.4 2019-01-22 21:10:01 +01:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.