Package: libwebkit2gtk-4.0-37
Version: 2.28.1-1
Severity: normal
Tags: upstream
Forwarded: https://bugs.webkit.org/show_bug.cgi?id=210561
Since upgrading to 2.28.0-2,
/usr/lib/x86_64-linux-gnu/webkit2gtk-4.0/WebKitWebProcess
polls like mad and causes excessive wakeups, draining my laptop battery:
$ ps axfu
[...]
tomi 243322 15.0 0.2 102683612 96224 ? Sl 17:53 0:00 liferea
tomi 243332 4.7 0.2 102722076 90816 ? SLl 17:53 0:00 \_
/usr/lib/x86_64-linux-gnu/webkit2gtk-4.0/WebKitWebProcess 7 19
tomi 243333 1.5 0.1 103007620 53204 ? SLl 17:53 0:00 \_
/usr/lib/x86_64-linux-gnu/webkit2gtk-4.0/WebKitNetworkProcess 8 1
$ LANG=C strace -f -p 243332
strace: Process 243332 attached with 11 threads
[pid 243360] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 243359] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 243357] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 243356] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 243355] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 243344] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 243343] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 243342] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 243341] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 243340] futex(0x7f14fb18c7cc, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 243332] restart_syscall(<... resuming interrupted read ...>) = 0
[pid 243332] recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 243332] poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 2, 17) = 0
(Timeout)
[pid 243332] recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 243332] poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 2, 16) = 0
(Timeout)
[pid 243332] recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 243332] poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 2, 16) = 0
(Timeout)
[pid 243332] recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 243332] poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 2, 16) = 0
(Timeout)
[pid 243332] recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 243332] poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 2, 15) = 0
(Timeout)
[pid 243332] recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 243332] poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 2, 16) = 0
(Timeout)
[pid 243332] recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 243332] poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 2, 16) = 0
(Timeout)
[pid 243332] recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 243332] poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 2, 16) = 0
(Timeout)
I originally thought this is a regression since 2.26.4-1~deb10u2, as that
works just fine:
$ LANG=C strace -f -p 253200
strace: Process 253200 attached with 11 threads
[pid 253226] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 253223] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 253222] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 253221] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 253220] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 253212] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 253211] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 253210] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 253209] restart_syscall(<... resuming interrupted read ...> <unfinished
...>
[pid 253208] futex(0x7fcbcfee040c, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 253200] restart_syscall(<... resuming interrupted read ...>) = 0
[pid 253200] recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 253200] poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 2, 19885
<unfinished ...>
But it turns out visiting
https://en.wikipedia.org/wiki/GIF#/media/File:Rotating_earth_(large).gif using
surf and webkit 2.26.4-1~deb10u2 makes its WebKitWebProcess start polling like
crazy as well, and forever, even after switching to about:blank.
I went a bit further, found a probable cause and filed this upstream at
https://bugs.webkit.org/show_bug.cgi?id=210561 as I'm quite certain this is
affecting all distributions that use webgit2gtk.
-- System Information:
Debian Release: bullseye/sid
APT prefers testing
APT policy: (990, 'testing'), (990, 'stable'), (500, 'unstable-debug'), (500,
'testing-debug'), (500, 'stable-debug'), (500, 'unstable'), (500, 'stable'),
(1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.4.0-4-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_USER, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=cs_CZ.UTF-8, LC_CTYPE=cs_CZ.UTF-8 (charmap=UTF-8),
LANGUAGE=cs_CZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages libwebkit2gtk-4.0-37 depends on:
ii bubblewrap 0.4.1-1
ii libatk1.0-0 2.36.0-2
ii libc6 2.30-4
ii libcairo2 1.16.0-4
ii libegl1 1.3.1-1
ii libenchant-2-2 2.2.8-1
ii libfontconfig1 2.13.1-2+b1
ii libfreetype6 2.10.1-2
ii libgcc-s1 10-20200324-1
ii libgcrypt20 1.8.5-5
ii libgdk-pixbuf2.0-0 2.40.0+dfsg-4
ii libgl1 1.3.1-1
ii libglib2.0-0 2.64.1-1
ii libgstreamer-gl1.0-0 1.16.2-4
ii libgstreamer-plugins-base1.0-0 1.16.2-4
ii libgstreamer1.0-0 1.16.2-2
ii libgtk-3-0 3.24.18-1
ii libharfbuzz-icu0 2.6.4-1
ii libharfbuzz0b 2.6.4-1
ii libhyphen0 2.8.8-7
ii libicu63 63.2-3
ii libjavascriptcoregtk-4.0-18 2.28.1-1
ii libjpeg62-turbo 1:1.5.2-2+b1
ii libnotify4 0.7.9-1
ii libopenjp2-7 2.3.1-1
hi libpango-1.0-0 1.42.4-8
ii libpng16-16 1.6.37-2
ii libseccomp2 2.4.3-1+b1
ii libsecret-1-0 0.20.2-1
ii libsoup2.4-1 2.70.0-1
ii libsqlite3-0 3.31.1-4
ii libstdc++6 10-20200324-1
ii libtasn1-6 4.16.0-2
ii libwayland-client0 1.18.0-1
ii libwayland-egl1 1.18.0-1
ii libwayland-server0 1.18.0-1
ii libwebp6 0.6.1-2+b1
ii libwebpdemux2 0.6.1-2+b1
ii libwoff1 1.0.2-1+b1
ii libwpe-1.0-1 1.6.0-1
ii libwpebackend-fdo-1.0-1 1.6.0-1
ii libx11-6 2:1.6.9-2
ii libxcomposite1 1:0.4.4-2
ii libxdamage1 1:1.1.5-1
ii libxml2 2.9.10+dfsg-4
ii libxslt1.1 1.1.34-4
ii xdg-dbus-proxy 0.1.2-1
ii zlib1g 1:1.2.11.dfsg-2
Versions of packages libwebkit2gtk-4.0-37 recommends:
ii gstreamer1.0-gl 1.16.2-4
ii gstreamer1.0-libav 1.16.2-2
ii gstreamer1.0-plugins-good 1.16.2-3
ii gstreamer1.0-pulseaudio 1.16.2-3
ii libgl1-mesa-dri 19.3.3-1
libwebkit2gtk-4.0-37 suggests no packages.
-- no debconf information
--
Tomáš Janoušek, a.k.a. Pivník, a.k.a. Liskni_si, http://work.lisk.in/
