1477444 - Content Processes Crash with Tiling Enabled

Status: RESOLVED WORKSFORME

(Core :: Graphics: Layers, defect, P3)

Description

[Will Roberts [:bws42]]

All of my tabs have crashed with 100% reproducibility since tiling was enabled on Linux:

bp-a6b51a3b-3f24-4561-954c-cc68e0180719
bp-1c2b8fcd-2848-487c-b4a7-9c0b90180719
bp-8657b39f-218d-4c85-b3c9-30f190180719
bp-7138aa44-833f-478b-8f81-4fa810180719
bp-3b332629-1277-4b9e-a3be-030a90180719
bp-53344b81-64e0-4985-bcf0-1f6d20180719
bp-283041d1-1155-487e-931a-f01b70180719

Disabling tiling prevents the crashes

Comment 1

[Pascal Chevrel:pascalc]

Ryan, it seems that these crashes are caused by tiling on Linux, could you have a look please? Thanks

Comment 2

[Ryan Hunt [:rhunt]]

Hmm, all these crashes are happening on the paint workers when rasterizing glyphs. Could be another freetype race condition.

Could you check to see if enabling tiling but setting 'layers.omtp.paint-workers = 1' still crashes?

Comment 3

[Ryan Hunt [:rhunt]]

Also if you could copy and paste the contents of about:support, that could help here.

Comment 4

[Will Roberts [:bws42]]

Enabling tiling, but setting 1 paint worker also prevents crashes.

Application Basics
------------------

Name: Firefox
Version: 63.0a1
Build ID: 20180724223402
Update Channel: nightly
User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:63.0) Gecko/20100101 Firefox/63.0
OS: Linux 3.16.0-6-amd64
Multiprocess Windows: 1/1 (Enabled by default)
Web Content Processes: 3/4
Enterprise Policies: Inactive
Google Key: Found
Mozilla Location Service Key: Found
Safe Mode: false

Crash Reports for the Last 3 Days
---------------------------------

All Crash Reports     Nightly Features
--------------------------------------

Name: Activity Stream
Version: 2018.07.18.1179-6b6a3463
ID: [e-mail]

Name: Application Update Service Helper
Version: 2.0
ID: [e-mail]

Name: Firefox Screenshots
Version: 33.0.0
ID: [e-mail]

Name: Follow-on Search Telemetry
Version: 0.9.7
ID: [e-mail]

Name: Form Autofill
Version: 1.0
ID: [e-mail]

Name: Photon onboarding
Version: 1.0
ID: [e-mail]

Name: Pocket
Version: 1.0.5
ID: [e-mail]

Name: Web Compat
Version: 2.0
ID: [e-mail]

Name: WebCompat Reporter
Version: 1.0.0
ID: [e-mail]

Extensions
----------

Name: Stylus
Version: 1.3.18
Enabled: true
ID: {7a7a4a92-a2a0-41d1-9fd7-1e92480d612d}

Name: WonderProxy Switcher
Version: 0.0.5
Enabled: true
ID: {aa653efc-e435-4d15-8312-f64711dcaeb6}

Name: 1Password X – Password Manager
Version: 1.7.1
Enabled: false
ID: {d634138d-c276-4fc8-924b-40a0ea21d284}

Name: JSONovich
Version: 2.1.2
Enabled: false
ID: [e-mail]

Security Software
----------------- Type:

Type:

Type:

Graphics
--------

Features
Compositing: Basic
Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled
WebGL 1 Driver WSI Info: GLX 1.4 GLX_VENDOR(client): Mesa Project and SGI GLX_VENDOR(server): SGI Extensions: GLX_ARB_create_context GLX_ARB_create_context_profile GLX_ARB_create_context_robustness GLX_ARB_fbconfig_float GLX_ARB_framebuffer_sRGB GLX_ARB_get_proc_address GLX_ARB_multisample GLX_EXT_import_context GLX_EXT_visual_info GLX_EXT_visual_rating GLX_EXT_framebuffer_sRGB GLX_EXT_create_context_es2_profile GLX_MESA_copy_sub_buffer GLX_MESA_multithread_makecurrent GLX_MESA_query_renderer GLX_MESA_swap_control GLX_OML_swap_method GLX_OML_sync_control GLX_SGI_make_current_read GLX_SGI_swap_control GLX_SGI_video_sync GLX_SGIS_multisample GLX_SGIX_fbconfig GLX_SGIX_pbuffer GLX_SGIX_visual_select_group GLX_EXT_texture_from_pixmap GLX_INTEL_swap_event
WebGL 1 Driver Renderer: Intel Open Source Technology Center -- Mesa DRI Intel(R) Ivybridge Mobile
WebGL 1 Driver Version: 3.0 Mesa 10.3.2
WebGL 1 Driver Extensions: GL_ARB_multisample GL_EXT_abgr GL_EXT_bgra GL_EXT_blend_color GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_copy_texture GL_EXT_polygon_offset GL_EXT_subtexture GL_EXT_texture_object GL_EXT_vertex_array GL_EXT_compiled_vertex_array GL_EXT_texture GL_EXT_texture3D GL_IBM_rasterpos_clip GL_ARB_point_parameters GL_EXT_draw_range_elements GL_EXT_packed_pixels GL_EXT_point_parameters GL_EXT_rescale_normal GL_EXT_separate_specular_color GL_EXT_texture_edge_clamp GL_SGIS_generate_mipmap GL_SGIS_texture_border_clamp GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_ARB_framebuffer_sRGB GL_ARB_multitexture GL_EXT_framebuffer_sRGB GL_IBM_multimode_draw_arrays GL_IBM_texture_mirrored_repeat GL_3DFX_texture_compression_FXT1 GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_transpose_matrix GL_EXT_blend_func_separate GL_EXT_fog_coord GL_EXT_multi_draw_arrays GL_EXT_secondary_color GL_EXT_texture_env_add GL_EXT_texture_filter_anisotropic GL_EXT_texture_lod_bias GL_INGR_blend_func_separate GL_NV_blend_square GL_NV_light_max_exponent GL_NV_texgen_reflection GL_NV_texture_env_combine4 GL_S3_s3tc GL_SUN_multi_draw_arrays GL_ARB_texture_border_clamp GL_ARB_texture_compression GL_EXT_framebuffer_object GL_EXT_texture_compression_s3tc GL_EXT_texture_env_combine GL_EXT_texture_env_dot3 GL_MESA_window_pos GL_NV_packed_depth_stencil GL_NV_texture_rectangle GL_ARB_depth_texture GL_ARB_occlusion_query GL_ARB_shadow GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar GL_ARB_texture_env_dot3 GL_ARB_texture_mirrored_repeat GL_ARB_window_pos GL_EXT_stencil_two_side GL_EXT_texture_cube_map GL_NV_depth_clamp GL_APPLE_packed_pixels GL_APPLE_vertex_array_object GL_ARB_draw_buffers GL_ARB_fragment_program GL_ARB_fragment_shader GL_ARB_shader_objects GL_ARB_vertex_program GL_ARB_vertex_shader GL_ATI_draw_buffers GL_ATI_texture_env_combine3 GL_ATI_texture_float GL_EXT_shadow_funcs GL_EXT_stencil_wrap GL_MESA_pack_invert GL_NV_primitive_restart GL_ARB_depth_clamp 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GL_ARB_copy_buffer GL_ARB_depth_buffer_float GL_ARB_draw_instanced GL_ARB_half_float_vertex GL_ARB_instanced_arrays GL_ARB_map_buffer_range GL_ARB_texture_rg GL_ARB_texture_swizzle GL_ARB_vertex_array_bgra GL_EXT_texture_swizzle GL_EXT_vertex_array_bgra GL_NV_conditional_render GL_AMD_conservative_depth GL_AMD_draw_buffers_blend GL_AMD_seamless_cubemap_per_texture GL_ARB_ES2_compatibility GL_ARB_blend_func_extended GL_ARB_debug_output GL_ARB_draw_buffers_blend GL_ARB_draw_elements_base_vertex GL_ARB_explicit_attrib_location GL_ARB_fragment_coord_conventions GL_ARB_provoking_vertex GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_seamless_cube_map GL_ARB_shader_texture_lod GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_multisample GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_uniform_buffer_object GL_ARB_vertex_type_2_10_10_10_rev GL_EXT_provoking_vertex GL_EXT_texture_snorm GL_MESA_texture_signed_rgba GL_ARB_get_program_binary GL_ARB_robustness GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_texture_compression_bptc GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_internalformat_query GL_ARB_map_buffer_alignment GL_ARB_shader_atomic_counters GL_ARB_shading_language_420pack GL_ARB_shading_language_packing GL_ARB_texture_storage GL_ARB_transform_feedback_instanced GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_transform_feedback GL_AMD_shader_trinary_minmax GL_ARB_ES3_compatibility GL_ARB_clear_buffer_object GL_ARB_copy_image GL_ARB_explicit_uniform_location GL_ARB_invalidate_subdata GL_ARB_texture_query_levels GL_ARB_texture_storage_multisample GL_ARB_texture_view GL_ARB_vertex_attrib_binding GL_KHR_debug GL_ARB_buffer_storage GL_ARB_clear_texture GL_ARB_multi_bind GL_ARB_seamless_cubemap_per_texture GL_ARB_texture_mirror_clamp_to_edge GL_ARB_vertex_type_10f_11f_11f_rev GL_EXT_shader_integer_mix GL_INTEL_performance_query GL_ARB_conditional_render_inverted GL_ARB_derivative_control
WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_frag_depth EXT_sRGB EXT_shader_texture_lod EXT_texture_filter_anisotropic EXT_disjoint_timer_query OES_element_index_uint OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_etc WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context
WebGL 2 Driver WSI Info: GLX 1.4 GLX_VENDOR(client): Mesa Project and SGI GLX_VENDOR(server): SGI Extensions: GLX_ARB_create_context GLX_ARB_create_context_profile GLX_ARB_create_context_robustness GLX_ARB_fbconfig_float GLX_ARB_framebuffer_sRGB GLX_ARB_get_proc_address GLX_ARB_multisample GLX_EXT_import_context GLX_EXT_visual_info GLX_EXT_visual_rating GLX_EXT_framebuffer_sRGB GLX_EXT_create_context_es2_profile GLX_MESA_copy_sub_buffer GLX_MESA_multithread_makecurrent GLX_MESA_query_renderer GLX_MESA_swap_control GLX_OML_swap_method GLX_OML_sync_control GLX_SGI_make_current_read GLX_SGI_swap_control GLX_SGI_video_sync GLX_SGIS_multisample GLX_SGIX_fbconfig GLX_SGIX_pbuffer GLX_SGIX_visual_select_group GLX_EXT_texture_from_pixmap GLX_INTEL_swap_event
WebGL 2 Driver Renderer: Intel Open Source Technology Center -- Mesa DRI Intel(R) Ivybridge Mobile
WebGL 2 Driver Version: 3.3 (Core Profile) Mesa 10.3.2
WebGL 2 Driver Extensions: GL_ARB_ES2_compatibility GL_ARB_ES3_compatibility GL_ARB_base_instance GL_ARB_blend_func_extended GL_ARB_buffer_storage GL_ARB_clear_buffer_object GL_ARB_clear_texture GL_ARB_compressed_texture_pixel_storage GL_ARB_conditional_render_inverted GL_ARB_copy_buffer GL_ARB_copy_image GL_ARB_conservative_depth GL_ARB_debug_output GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_derivative_control GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_elements_base_vertex GL_ARB_draw_indirect GL_ARB_draw_instanced GL_ARB_explicit_attrib_location GL_ARB_explicit_uniform_location GL_ARB_fragment_coord_conventions GL_ARB_fragment_shader GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB GL_ARB_get_program_binary GL_ARB_gpu_shader5 GL_ARB_half_float_pixel GL_ARB_half_float_vertex GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_invalidate_subdata GL_ARB_map_buffer_alignment GL_ARB_map_buffer_range GL_ARB_multi_bind GL_ARB_multi_draw_indirect GL_ARB_occlusion_query2 GL_ARB_pixel_buffer_object GL_ARB_point_sprite GL_ARB_provoking_vertex GL_ARB_robustness GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_seamless_cube_map GL_ARB_seamless_cubemap_per_texture GL_ARB_separate_shader_objects GL_ARB_shader_atomic_counters GL_ARB_shader_bit_encoding GL_ARB_shader_objects GL_ARB_shader_texture_lod GL_ARB_shading_language_packing GL_ARB_shading_language_420pack GL_ARB_sync GL_ARB_texture_buffer_object GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_buffer_range GL_ARB_texture_compression_bptc GL_ARB_texture_compression_rgtc GL_ARB_texture_cube_map_array GL_ARB_texture_float GL_ARB_texture_gather GL_ARB_texture_mirror_clamp_to_edge GL_ARB_texture_multisample GL_ARB_texture_non_power_of_two GL_ARB_texture_query_levels GL_ARB_texture_query_lod GL_ARB_texture_rectangle GL_ARB_texture_rgb10_a2ui GL_ARB_texture_rg GL_ARB_texture_storage GL_ARB_texture_storage_multisample GL_ARB_texture_view GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_transform_feedback_instanced GL_ARB_uniform_buffer_object GL_ARB_vertex_array_bgra GL_ARB_vertex_array_object GL_ARB_vertex_attrib_binding GL_ARB_vertex_shader GL_ARB_vertex_type_10f_11f_11f_rev GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_abgr GL_EXT_blend_equation_separate GL_EXT_draw_buffers2 GL_EXT_draw_instanced GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_framebuffer_sRGB GL_EXT_packed_depth_stencil GL_EXT_packed_float GL_EXT_pixel_buffer_object GL_EXT_provoking_vertex GL_EXT_shader_integer_mix GL_EXT_texture_array GL_EXT_texture_compression_dxt1 GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_EXT_texture_compression_rgtc GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_integer GL_EXT_texture_shared_exponent GL_EXT_texture_snorm GL_EXT_texture_sRGB GL_EXT_texture_sRGB_decode GL_EXT_texture_swizzle GL_EXT_timer_query GL_EXT_transform_feedback GL_EXT_vertex_array_bgra GL_OES_EGL_image GL_OES_read_format GL_KHR_debug GL_3DFX_texture_compression_FXT1 GL_AMD_conservative_depth GL_AMD_draw_buffers_blend GL_AMD_performance_monitor GL_AMD_seamless_cubemap_per_texture GL_AMD_shader_trinary_minmax GL_AMD_vertex_shader_layer GL_AMD_vertex_shader_viewport_index GL_APPLE_object_purgeable GL_ATI_blend_equation_separate GL_ATI_texture_float GL_IBM_multimode_draw_arrays GL_INTEL_performance_query GL_MESA_pack_invert GL_MESA_texture_signed_rgba GL_NV_conditional_render GL_NV_depth_clamp GL_NV_packed_depth_stencil GL_S3_s3tc
WebGL 2 Extensions: EXT_color_buffer_float EXT_texture_filter_anisotropic EXT_disjoint_timer_query OES_texture_float_linear WEBGL_compressed_texture_etc WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context
Uses Tiling: true
Uses Tiling (Content): true
Off Main Thread Painting Enabled: true
Off Main Thread Painting Worker Count: 1
GPU #1
Active: Yes
Description: Intel Open Source Technology Center -- Mesa DRI Intel(R) Ivybridge Mobile
Vendor ID: Intel Open Source Technology Center
Device ID: Mesa DRI Intel(R) Ivybridge Mobile
Driver Version: 3.0 Mesa 10.3.2

Diagnostics
AzureCanvasAccelerated: 0
AzureCanvasBackend: skia
AzureContentBackend: skia
AzureFallbackCanvasBackend: none
CairoUseXRender: 0
TileHeight: 512
TileWidth: 512
Device Reset: Trigger Device Reset
Decision Log
HW_COMPOSITING:
blocked by default: Acceleration blocked by platform
OPENGL_COMPOSITING:
unavailable by default: Hardware compositing is disabled
WEBRENDER:
opt-in by default: WebRender is an opt-in feature
unavailable by runtime: Hardware compositing is disabled
WEBRENDER_QUALIFIED:
blocked by env: No qualified hardware




Media
-----

Audio Backend: remote
Max Channels: 2
Preferred Sample Rate: 44100
Output Devices
Name: Group
Built-in Audio Analog Stereo: /devices/pci0000:00/0000:00:1b.0/sound/card0
Input Devices
Name: Group
Monitor of Built-in Audio Analog Stereo: /devices/pci0000:00/0000:00:1b.0/sound/card0
Built-in Audio Analog Stereo: /devices/pci0000:00/0000:00:1b.0/sound/card0

Important Modified Preferences
------------------------------

accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.capacity: 1048576
browser.cache.disk.filesystem_reported: 1
browser.cache.disk.hashstats_reported: 1
browser.cache.disk.smart_size_cached_value: 358400
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.cache.frecency_experiment: 2
browser.download.folderList: 0
browser.fixup.domainwhitelist.branch21: true
browser.fixup.domainwhitelist.branch45: true
browser.fixup.domainwhitelist.germserver2: true
browser.fixup.domainwhitelist.monitor: true
browser.fixup.domainwhitelist.nas-pri: true
browser.fixup.domainwhitelist.phadminsvr2: true
browser.fixup.domainwhitelist.robox10: true
browser.fixup.domainwhitelist.robox13: true
browser.fixup.domainwhitelist.robox7: true
browser.fixup.domainwhitelist.roboxrd4: true
browser.places.smartBookmarksVersion: 8
browser.search.useDBForOrder: true
browser.sessionstore.upgradeBackup.latestBuildID: 20180724223402
browser.startup.homepage_override.buildID: 20180724223402
browser.startup.homepage_override.mstone: 63.0a1
browser.tabs.remote.autostart.2: false
browser.tabs.warnOnClose: false
browser.urlbar.matchBuckets: general:5,suggestion:Infinity
browser.urlbar.placeholderName: Google
browser.urlbar.searchSuggestionsChoice: false
browser.urlbar.suggest.searches: false
browser.urlbar.userMadeSearchSuggestionsChoice: true
dom.apps.lastUpdate.buildID: 20160922113459
dom.apps.lastUpdate.mstone: 49.0.1
dom.apps.reset-permissions: true
dom.forms.autocomplete.formautofill: true
dom.max_script_run_time: 0
dom.mozApps.used: true
extensions.checkCompatibility.nightly: false
extensions.formautofill.addresses.enabled: false
extensions.formautofill.creditCards.enabled: false
extensions.formautofill.firstTimeUse: false
extensions.lastAppVersion: 63.0a1
font.internaluseonly.changed: true
gfx.crash-guard.glcontext.appVersion: 43.0a1
gfx.crash-guard.glcontext.deviceID: Mesa DRI Intel(R) Ivybridge Mobile
gfx.crash-guard.glcontext.driverVersion: 3.0 Mesa 8.0.5
gfx.crash-guard.status.glcontext: 2
layers.omtp.paint-workers: 1
media.eme.enabled: true
media.gmp-gmpopenh264.abi: x86_64-gcc3
media.gmp-gmpopenh264.lastUpdate: 1529025301
media.gmp-gmpopenh264.version: 1.7.1
media.gmp-manager.buildID: 20180723220051
media.gmp-manager.lastCheck: 1532451364
media.gmp-widevinecdm.abi: x86_64-gcc3
media.gmp-widevinecdm.lastUpdate: 1504617139
media.gmp-widevinecdm.version: 1.4.8.1008
media.gmp.storage.version.observed: 1
media.gstreamer.enabled: false
media.webrtc.debug.aec_log_dir: /tmp
media.webrtc.debug.log_file: /tmp/WebRTC.log
network.cookie.prefsMigrated: true
network.predictor.cleaned-up: true
network.trr.experimentalRollout: -2
places.database.lastMaintenance: 1532234460
places.history.expiration.transient_current_max_pages: 146723
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
plugin.load_flash_only: false
plugin.soname.list:
plugin.state.flash: 0
plugin.state.gecko-mediaplayer: 0
plugin.state.gecko-mediaplayer-dvx: 0
plugin.state.gecko-mediaplayer-qt: 0
plugin.state.gecko-mediaplayer-rm: 0
plugin.state.gecko-mediaplayer-wmp: 0
print.print_bgcolor: false
print.print_bgimages: false
print.print_colorspace: default
print.print_downloadfonts: false
print.print_duplex: 0
print.print_evenpages: true
print.print_footerleft:
print.print_footerright:
print.print_headerleft:
print.print_headerright:
print.print_margin_bottom: 0.5
print.print_margin_left: 0.5
print.print_margin_right: 0.5
print.print_margin_top: 0.5
print.print_oddpages: true
print.print_orientation: 0
print.print_page_delay: 50
print.print_paper_data: 0
print.print_paper_height: 279.40
print.print_paper_name: na_letter
print.print_paper_size_type: 1
print.print_paper_size_unit: 1
print.print_paper_width: 215.90
print.print_plex_name: default
print.print_resolution: 300
print.print_resolution_name: default
print.print_scaling: 0.80
print.print_shrink_to_fit: false
print.print_to_file: false
print.print_unwriteable_margin_bottom: 56
print.print_unwriteable_margin_left: 25
print.print_unwriteable_margin_right: 25
print.print_unwriteable_margin_top: 25
privacy.cpd.cookies: false
privacy.cpd.downloads: false
privacy.cpd.formdata: false
privacy.cpd.history: false
privacy.cpd.sessions: false
privacy.sanitize.migrateClearSavedPwdsOnExit: true
privacy.sanitize.migrateFx3Prefs: true
privacy.sanitize.pending: [{"id":"newtab-container","itemsToClear":[],"options":{}}]
privacy.sanitize.timeSpan: 0
security.default_personal_cert: Select Automatically
security.disable_button.openCertManager: false
security.sandbox.content.tempDirSuffix: e0f5353b-a485-42a7-aa64-3bc5bfe87b7e
services.sync.declinedEngines:
services.sync.engine.addresses.available: true
services.sync.engine.creditcards.available: true
signon.importedFromSqlite: true
signon.rememberSignons: false
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1530284492

Important Locked Preferences
----------------------------

Places Database
---------------

JavaScript
----------

Incremental GC: true

Accessibility
-------------

Activated: false
Prevent Accessibility: 0

Library Versions
----------------

NSPR
Expected minimum version: 4.20 Beta
Version in use: 4.20 Beta

NSS
Expected minimum version: 3.39 Beta
Version in use: 3.39 Beta

NSSSMIME
Expected minimum version: 3.39 Beta
Version in use: 3.39 Beta

NSSSSL
Expected minimum version: 3.39 Beta
Version in use: 3.39 Beta

NSSUTIL
Expected minimum version: 3.39 Beta
Version in use: 3.39 Beta

Sandbox
-------

Seccomp-BPF (System Call Filtering): true
Seccomp Thread Synchronization: false
User Namespaces for privileged processes: true
User Namespaces: false
Content Process Sandboxing: true
Media Plugin Sandboxing: true
Content Process Sandbox Level: 4
Effective Content Process Sandbox Level: 4

Rejected System Calls
---------------------

Internationalization & Localization
-----------------------------------

Application Settings
Requested Locales: ["en-US"]
Available Locales: ["en-US"]
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Comment 5

[Marcia Knous [:marcia]]

Hello Ryan: Mission Control has detected a spike in Linux content crashes - see https://data-missioncontrol.dev.mozaws.net/#/?channel=nightly for more detail. Do we think tiling might be involved in this increase?

Comment 6

[Pascal Chevrel:pascalc]

Adding signatures from bug reports in comment 0

Comment 7

[Ryan Hunt [:rhunt]]

(In reply to Marcia Knous [:marcia - needinfo? me] from comment #5)
> Hello Ryan: Mission Control has detected a spike in Linux content crashes -
> see https://data-missioncontrol.dev.mozaws.net/#/?channel=nightly for more
> detail. Do we think tiling might be involved in this increase?

Yes it's possible that tiling is to blame for the spike in linux content crashes. We're currently trying to hunt down what's causing the crashes in this bug, and also bug 1477226. The crashes seem to be triggered by race conditions in our font stack (skia, cairo-ft, freetype).

Lee found a race condition in Skia here and is landing a fix for it in bug 1473732, but it's probable it's not the only one. It would be good to know if his fix makes a positive impact in the crash rate, though.

Comment 8

[Ritu Kothari (:ritu) (Inactive, please n-i to RyanVM, jcristau, or pascal)]

Hi David, Ryan, given the spike in crashes since this feature was enabled on Nightly63, I'd like to suggest we turn it off until we have a good fix in place. What do you think? Is this feature going to ship with the 63 train? Or is tiling tracked for 64 release?

Comment 9

[David Bolter [:davidb] (NeedInfo me for attention)]

It is tempting to let this go a bit longer to see if Lee's fix on the other bug helps... Does comment 0 imply this completely blocks FF nightly usage for some users? I'm not sure I fully grasp the severity. Comment 8 is on Ryan's radar and we'll touch base tomorrow...

Comment 10

[Ryan Hunt [:rhunt]]

(In reply to Ritu Kothari (:ritu) from comment #8)
> Hi David, Ryan, given the spike in crashes since this feature was enabled on
> Nightly63, I'd like to suggest we turn it off until we have a good fix in
> place. What do you think? Is this feature going to ship with the 63 train?
> Or is tiling tracked for 64 release?

We should disable this for now. I believe 4-5 of the top 7 content crashes on linux right now are caused by this. Apologies for letting this slip so long, I should have followed the crash rate here closer as this is in retrospect a major change.

I'll file the bug to disable it for now. Also to answer your question, there is no specific train we'd like this feature to ship in.

Comment 11

[Will Roberts [:bws42]]

(In reply to David Bolter [:davidb] (NeedInfo me for attention) from comment #9)
> It is tempting to let this go a bit longer to see if Lee's fix on the other
> bug helps... Does comment 0 imply this completely blocks FF nightly usage
> for some users? I'm not sure I fully grasp the severity. Comment 8 is on
> Ryan's radar and we'll touch base tomorrow...

For me, yes I was completely unable to use my browser; every tab would crash. I suppose others may have had a different experience.

I've had no issues since disabling tiling or switching to a single painter. If a build is made with a fix, I'd be happy to try it out.

Comment 12

[BugBot [:suhaib / :marco/ :calixte]]

Closing because no crashes reported for 12 weeks.

Comment 13

[Calixte Denizet (:calixte)]

There are still some crashes so reopen it.

Comment 14

[Olivier Duclos]

The graph indicates no more crash since June. Can you still reproduce the issue?

Comment 15

[Will Roberts [:bws42]]

I've had no crashes recently.

Comment 16

[BugBot [:suhaib / :marco/ :calixte]]

Closing because no crashes reported for 12 weeks.