linux/drivers/gpu/drm/i915
Joonas Lahtinen 4681ee21d6 drm/i915: Do not sync RCU during shrinking
Due to the complex dependencies between workqueues and RCU, which
are not easily detected by lockdep, do not synchronize RCU during
shrinking.

On low-on-memory systems (mem=1G for example), the RCU sync leads
to all system workqueus freezing and unrelated lockdep splats are
displayed according to reports. GIT bisecting done by J. R.
Okajima points to the commit where RCU syncing was extended.

RCU sync gains us very little benefit in real life scenarios
where the amount of memory used by object backing storage is
dominant over the metadata under RCU, so drop it altogether.

 " Yeeeaah, if core could just, go ahead and reclaim RCU
   queues, that'd be great. "

  - Chris Wilson, 2016 (0eafec6d32)

v2: More information to commit message.
v3: Remove "grep _rcu_" escapee from i915_gem_shrink_all (Andrea)

Fixes: c053b5a506 ("drm/i915: Don't call synchronize_rcu_expedited under struct_mutex")
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Reported-by: J. R. Okajima <hooanon05g@gmail.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Hugh Dickins <hughd@google.com>
Tested-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: J. R. Okajima <hooanon05g@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: <stable@vger.kernel.org> # v4.11+
(cherry picked from commit 73cc0b9aa9)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1495097379-573-1-git-send-email-joonas.lahtinen@linux.intel.com
2017-05-18 14:15:20 +03:00
..
gvt Merge tag 'gvt-fixes-2017-05-11' of https://github.com/01org/gvt-linux into drm-intel-fixes 2017-05-15 13:03:31 +03:00
selftests Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-05-10 10:30:46 -07:00
dvo_ch7xxx.c
dvo_ch7017.c
dvo_ivch.c
dvo_ns2501.c
dvo_sil164.c
dvo_tfp410.c
dvo.h
i915_cmd_parser.c drm/i915/cmdparser: Limit clflush to active cachelines 2017-03-10 13:02:34 +00:00
i915_debugfs.c drm/i915: Move retire-requests into i915_gem_wait_for_idle() 2017-03-31 12:03:46 +01:00
i915_drv.c Merge tag 'drm-intel-next-fixes-2017-04-27' of git://anongit.freedesktop.org/git/drm-intel into drm-next 2017-04-29 05:50:27 +10:00
i915_drv.h drm/i915: Update DRIVER_DATE to 20170403 2017-04-03 07:52:18 +02:00
i915_gem_batch_pool.c drm/i915: Retire an active batch pool object rather than allocate new 2017-03-17 17:57:20 +00:00
i915_gem_batch_pool.h
i915_gem_clflush.c drm/i915: Wait for all fences before installing an exclusive clflush fence 2017-03-23 12:02:53 +00:00
i915_gem_clflush.h drm/i915: Perform object clflushing asynchronously 2017-02-22 12:12:15 +00:00
i915_gem_context.c drm/i915: Disable MI_SET_CONTEXT psmi w/a for bdw 2017-03-24 17:10:10 +00:00
i915_gem_context.h drm/i915: make context status notifier head be per engine 2017-03-21 16:51:47 +02:00
i915_gem_dmabuf.c dma-buf: Rename dma-ops to prevent conflict with kunmap_atomic macro 2017-04-20 13:47:46 +05:30
i915_gem_evict.c drm/i915: Move retire-requests into i915_gem_wait_for_idle() 2017-03-31 12:03:46 +01:00
i915_gem_execbuffer.c drm/i915: Align "unfenced" tiled access on gen2, early gen3 2017-03-29 13:52:08 +03:00
i915_gem_fence_reg.c drm/i915: Take rpm wakelock for releasing the fence on unbind 2017-03-06 14:38:18 +00:00
i915_gem_fence_reg.h drm/i915: Replace 4096 with PAGE_SIZE or I915_GTT_PAGE_SIZE 2017-01-10 20:54:32 +00:00
i915_gem_gtt.c drm/i915: don't do allocate_va_range again on PIN_UPDATE 2017-05-15 14:44:33 +03:00
i915_gem_gtt.h drm/i915: Avoid using word legacy with ppgtt 2017-03-03 16:46:23 +02:00
i915_gem_internal.c Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
i915_gem_object.h drm/i915: Use pagecache write to prepopulate shmemfs from pwrite-ioctl 2017-03-09 10:46:07 +02:00
i915_gem_render_state.c scripts/spelling.txt: add "aligment" pattern and fix typo instances 2017-02-27 18:43:46 -08:00
i915_gem_render_state.h
i915_gem_request.c drm/i915: Confirm the request is still active before adding it to the await 2017-04-26 16:28:47 +03:00
i915_gem_request.h Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-05-10 10:30:46 -07:00
i915_gem_shrinker.c drm/i915: Do not sync RCU during shrinking 2017-05-18 14:15:20 +03:00
i915_gem_stolen.c drm/i915/gvt: Disable access to stolen memory as a guest 2017-02-16 11:59:13 +02:00
i915_gem_tiling.c drm/i915: Prevent concurrent tiling/framebuffer modifications 2017-03-01 17:57:17 +00:00
i915_gem_timeline.c drm/i915: Assert all timeline requests are gone before fini 2017-01-05 15:34:40 +00:00
i915_gem_timeline.h drm/i915: Keep a global seqno per-engine 2017-02-23 14:49:26 +00:00
i915_gem_userptr.c drm/i915/userptr: Reinvent GGTT self-faulting protection 2017-03-16 10:21:25 +00:00
i915_gem.c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-05-10 10:30:46 -07:00
i915_gem.h drm/i915: Rename conditional GEM execution macros 2017-02-10 21:43:43 +00:00
i915_gpu_error.c drm/i915: Split breadcrumbs spinlock into two 2017-03-03 20:19:13 +00:00
i915_guc_reg.h drm/i915/huc: Add HuC fw loading support 2017-01-19 11:18:55 +02:00
i915_guc_submission.c Revert "drm/i915: Skip execlists_dequeue() early if the list is empty" 2017-03-29 13:02:24 +01:00
i915_ioc32.c
i915_irq.c drm/i915: Fix system hang with EI UP masked on Haswell 2017-04-26 16:28:28 +03:00
i915_memcpy.c
i915_mm.c
i915_oa_hsw.c drm/i915: Add more Haswell OA metric sets 2016-11-22 14:40:00 +01:00
i915_oa_hsw.h drm/i915: advertise available metrics via sysfs 2016-11-22 14:38:51 +01:00
i915_params.c drm/i915/uc: Add params for specifying firmware 2017-03-15 14:26:30 +02:00
i915_params.h drm/i915/uc: Add params for specifying firmware 2017-03-15 14:26:30 +02:00
i915_pci.c drm/i915: Align "unfenced" tiled access on gen2, early gen3 2017-03-29 13:52:08 +03:00
i915_perf.c drm/i915/perf: remove user triggerable warn 2017-03-29 13:52:25 +03:00
i915_pvinfo.h
i915_reg.h drm/i915: Fix rawclk readout for g4x 2017-05-15 14:44:17 +03:00
i915_selftest.h drm/i915: Use fault-injection to force the shrinker to run in live GTT tests 2017-02-13 20:46:32 +00:00
i915_suspend.c drm/i915: Make i915_save/restore_state and intel_i2c_reset take dev_priv 2016-12-01 18:01:23 +00:00
i915_sw_fence.c gpu: drm: drivers: Convert printk(KERN_<LEVEL> to pr_<level> 2017-03-01 09:44:11 +01:00
i915_sw_fence.h drm/i915: Hold a reference on the request for its fence chain 2016-12-05 11:00:32 +02:00
i915_sysfs.c drm/i915: Return residency as microseconds 2017-03-16 12:28:28 +02:00
i915_trace_points.c
i915_trace.h drm/i915: Avoid use-after-free of ctx in request tracepoints 2017-03-17 07:59:48 +00:00
i915_utils.h drm/i915: Move WARN_ON/MISSING_CASE macros to i915_utils.h 2017-03-29 11:10:28 +01:00
i915_vgpu.c drm/i915: Fix vGPU balloon for ggtt guard page 2017-03-17 09:41:27 +00:00
i915_vgpu.h
i915_vma.c drm/i915: Remove the vma from the drm_mm if binding fails 2017-03-09 10:43:55 +02:00
i915_vma.h drm/i915: Exercise i915_vma_pin/i915_vma_insert 2017-02-13 20:46:41 +00:00
intel_acpi.c
intel_atomic_plane.c drm/i915: Add plane update/disable tracepoints 2017-03-03 16:50:10 +02:00
intel_atomic.c drm/i915: Skip useless watermark/FIFO related work on VLV/CHV when not needed 2017-03-03 16:50:10 +02:00
intel_audio.c Merge tag 'drm-intel-next-2017-03-06' of git://anongit.freedesktop.org/git/drm-intel into drm-next 2017-03-08 12:41:47 +10:00
intel_bios.c drm/i915/vbt: split out defaults that are set when there is no VBT 2017-03-14 10:49:13 +02:00
intel_bios.h drm/i915/dsi: Fix swapping of MIPI_SEQ_DEASSERT_RESET / MIPI_SEQ_ASSERT_RESET 2016-12-20 16:28:25 +02:00
intel_breadcrumbs.c drm/i915: Apply a cond_resched() to the saturated signaler 2017-04-26 16:27:58 +03:00
intel_cdclk.c drm/i915: Fix rawclk readout for g4x 2017-05-15 14:44:17 +03:00
intel_color.c drm/i915/glk: Improve rounding caused by pre-CSC gamma tables 2017-03-14 16:07:00 +02:00
intel_crt.c drm/atomic: Acquire connection_mutex lock in drm_helper_probe_single_connector_modes, v4. 2017-04-06 21:29:23 +02:00
intel_csr.c drm/i915: update the firmware download URL 2017-03-28 11:17:37 +03:00
intel_ddi.c drm/i915: make a few DDI functions static 2017-03-31 11:32:41 -03:00
intel_device_info.c drm/i915/glk: Enable pooled EUs for Geminilake 2017-03-17 17:05:36 +02:00
intel_display.c drm/i915: Make legacy cursor updates more unsynced 2017-04-26 16:28:03 +03:00
intel_dp_aux_backlight.c
intel_dp_link_training.c Revert "drm/i915: Implement Link Rate fallback on Link training failure" 2017-03-02 09:17:16 +01:00
intel_dp_mst.c Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux into drm-misc-next 2017-03-23 08:15:55 +01:00
intel_dp.c drm/i915: Perform link quality check unconditionally during long pulse 2017-04-26 16:28:19 +03:00
intel_dpio_phy.c drm/i915: Only poll DW3_A when init DDI PHY for ports B and C. 2016-12-02 12:16:25 -08:00
intel_dpll_mgr.c Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
intel_dpll_mgr.h drm/i915: Remove unused function intel_ddi_get_link_dpll() 2017-02-10 11:40:27 +02:00
intel_drv.h Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-04-11 07:41:10 +10:00
intel_dsi_dcs_backlight.c
intel_dsi_pll.c drm/i915/glk: Validate only DSI PORT A PLL divider 2017-02-28 11:54:52 +02:00
intel_dsi_vbt.c drm/i915/dsi: rename intel_dsi_panel_vbt.c to intel_dsi_vbt.c 2017-03-07 15:18:24 +02:00
intel_dsi.c drm/i915/glk: Fix DSI "*ERROR* ULPS is still active" messages 2017-05-15 14:44:04 +03:00
intel_dsi.h drm/i915/dsi: arrange intel_dsi.h according to relevant files 2017-03-07 15:18:43 +02:00
intel_dvo.c drm/i915: Store encoder power domain in struct intel_encoder 2017-02-27 09:07:51 +02:00
intel_engine_cs.c drm/i915: Suppress busy status for engines if wedged 2017-03-30 17:58:44 +01:00
intel_fbc.c drm/i915: Use new atomic iterator macros in fbc 2017-03-13 12:06:40 +01:00
intel_fbdev.c drm/i915/fbdev: Stop repeating tile configuration on stagnation 2017-03-09 10:43:17 +02:00
intel_fifo_underrun.c drm/i915: Add FIFO underrun tracepoints 2017-03-03 16:50:11 +02:00
intel_frontbuffer.c drm/i915: Remove 'retire' parameter from intel_fb_obj_flush 2017-02-22 12:12:17 +00:00
intel_frontbuffer.h drm/i915: Remove 'retire' parameter from intel_fb_obj_flush 2017-02-22 12:12:17 +00:00
intel_guc_fwif.h drm/i915/guc: Split out the mmio_white_list struct 2017-03-23 14:58:50 +02:00
intel_guc_loader.c drm/i915/uc: Move intel_uc_fw_status_repr() to intel_uc.h 2017-03-31 10:39:39 +03:00
intel_guc_log.c drm/i915/guc: Break out the GuC log extras into their own "runtime" struct 2017-03-23 14:58:02 +02:00
intel_gvt.c drm/i915/gvt: Turn on KBL platform support. 2017-03-29 15:28:51 +08:00
intel_gvt.h
intel_hangcheck.c drm/i915: Add initial selftests for hang detection and resets 2017-02-13 20:46:53 +00:00
intel_hdmi.c drm/i915: allow HDMI 2.0 clock rates 2017-03-28 10:17:49 +03:00
intel_hotplug.c drm/atomic: Acquire connection_mutex lock in drm_helper_probe_single_connector_modes, v4. 2017-04-06 21:29:23 +02:00
intel_huc.c drm/i915/huc: Remove unused intel_huc_fini() 2017-03-31 10:39:39 +03:00
intel_i2c.c drm/i915: Introduce IS_GEN9_BC for Skylake and Kabylake. 2017-01-24 10:29:00 -08:00
intel_lpe_audio.c drm/i915: Fix runtime PM for LPE audio 2017-05-15 14:44:11 +03:00
intel_lrc.c drm/i915: Avoid lock dropping between rescheduling 2017-03-31 13:39:47 +03:00
intel_lrc.h drm/i915: Move engine->submit_request selection to a vfunc 2017-03-16 17:17:12 +00:00
intel_lspcon.c drm/i915/lspcon: Fix resume time initialization due to unasserted HPD 2017-02-16 11:59:10 +02:00
intel_lvds.c drm/i915: Store encoder power domain in struct intel_encoder 2017-02-27 09:07:51 +02:00
intel_mocs.c drm/i915: Emit to ringbuffer directly 2017-02-14 14:30:46 +00:00
intel_mocs.h drm/i915: Make various init functions take dev_priv 2016-12-01 18:01:15 +00:00
intel_modes.c
intel_opregion.c drm/i915/opregion: debug log about invalid ACPI OpRegion VBT 2017-03-30 09:12:36 +03:00
intel_overlay.c drm/i915: Remove superfluous i915_add_request_no_flush() helper 2017-03-17 13:03:25 +00:00
intel_panel.c drm/i915: Start moving the cdclk stuff into a distinct state structure 2017-02-08 18:07:10 +02:00
intel_pipe_crc.c drm: Remove drm_modeset_legacy_acquire_ctx and crtc->acquire_ctx 2017-04-05 09:26:45 +02:00
intel_pm.c drm/i915: Move WARN_ON/MISSING_CASE macros to i915_utils.h 2017-03-29 11:10:28 +01:00
intel_psr.c drm/i915/psr: Fix compiler warnings for hsw_psr_disable() 2017-01-18 10:25:01 +00:00
intel_renderstate_gen6.c
intel_renderstate_gen7.c
intel_renderstate_gen8.c
intel_renderstate_gen9.c
intel_renderstate.h
intel_ringbuffer.c Merge tag 'topic/synopsys-media-formats-2017-04-03' of git://anongit.freedesktop.org/git/drm-misc into drm-misc-next 2017-04-04 11:34:31 -04:00
intel_ringbuffer.h drm/i915/execlists: Wrap tail pointer after reset tweaking 2017-03-29 15:45:48 +03:00
intel_runtime_pm.c drm/i915: WARN if the core runtime PM get helpers fail 2017-03-28 16:02:10 +03:00
intel_sdvo_regs.h
intel_sdvo.c drm/i915: Store encoder power domain in struct intel_encoder 2017-02-27 09:07:51 +02:00
intel_sideband.c drm/i915: Distinguish between timeout and error in sideband transactions 2017-02-27 17:22:19 +00:00
intel_sprite.c drm/i915: Make vblank evade warnings optional 2017-05-12 14:28:02 +10:00
intel_tv.c drm/atomic: Acquire connection_mutex lock in drm_helper_probe_single_connector_modes, v4. 2017-04-06 21:29:23 +02:00
intel_uc.c drm/i915/uc: Move fw path check to fetch_uc_fw() 2017-03-31 10:39:40 +03:00
intel_uc.h drm/i915/uc: Drop use of MISSING_CASE on trivial enums 2017-03-31 21:08:06 +01:00
intel_uncore.c drm/i915: All fw_domains share the same set/clear/reset values 2017-03-23 10:22:04 +00:00
intel_vbt_defs.h drm/915: Parsing the missed out DTD fields from the VBT 2016-12-23 15:13:39 +02:00
Kconfig Merge tag 'topic/designware-baytrail-2017-03-02' of git://anongit.freedesktop.org/git/drm-intel into drm-intel-next-queued 2017-03-13 09:26:06 +01:00
Kconfig.debug drm/i915: Make vblank evade warnings optional 2017-05-12 14:28:02 +10:00
Makefile Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next-queued 2017-03-08 10:54:45 +01:00