After upgrade from kernel 3.7.10 to 3.10.17 (both gentoo-sources) boot time has increased from 50 seconds to 80 seconds. The most significant delay happens at the beginning of boot, before OpenRC and all the services are started. A piece of dmesg: [ 1.879610] hid-generic 0003:046E:550F.0001: input: USB HID v1.10 Keyboard [BTC USB Multimedia Keyboard] on usb-0000:00:1d.7-8.4/input0 [ 1.901951] input: BTC USB Multimedia Keyboard as /devices/pci0000:00/0000:00:1d.7/usb1/1-8/1-8.4/1-8.4:1.1/input/input4 [ 1.912106] hid-generic 0003:046E:550F.0002: input: USB HID v1.10 Device [BTC USB Multimedia Keyboard] on usb-0000:00:1d.7-8.4/input1 [ 21.865252] scsi 4:0:0:0: Direct-Access TS128MJFLASHA 1.00 PQ: 0 ANSI: 2 [ 21.865703] sd 4:0:0:0: Attached scsi generic sg2 type 0 [ 21.872431] sd 4:0:0:0: [sdc] 253400 512-byte logical blocks: (129 MB/123 MiB) Bootchart shows that time is wasted by the three "async_port_probe" initcalls: https://drive.google.com/file/d/0B0r-Ej_PeoGMV1dURC10ZERCeVU/edit?usp=sharing Also tried gentoo-sources 3.12.6, but the boot delay is still there.
1) Please post your `emerge --info' output in a comment. 2) Please attach all relevant files to this bug report.
Created attachment 368386 [details] bootchart - collected info
Created attachment 368390 [details] bootchart - rendered image
Created attachment 368392 [details] kernel config
Created attachment 368394 [details] kernel config from 3.7.10 - no delay
Created attachment 368396 [details] dmesg from 3.7.10 - no delay
> emerge --info Portage 2.2.7 (default/linux/amd64/13.0/no-multilib, gcc-4.7.3, glibc-2.16.0, 3.10.17-gentoo x86_64) ================================================================= System uname: Linux-3.10.17-gentoo-x86_64-Intel-R-_Atom-TM-_CPU_N2800_@_1.86GHz-with-gentoo-2.2 KiB Mem: 4031304 total, 2845412 free KiB Swap: 4194300 total, 4194300 free Timestamp of tree: Thu, 26 Dec 2013 08:00:01 +0000 ld GNU ld (GNU Binutils) 2.23.2 app-shells/bash: 4.2_p45 dev-lang/python: 2.7.5-r3, 3.3.2-r2 dev-util/pkgconfig: 0.28 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.12.4 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.69 sys-devel/automake: 1.13.4 sys-devel/binutils: 2.23.2 sys-devel/gcc: 4.7.3-r1 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.2 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.9 (virtual/os-headers) sys-libs/glibc: 2.16.0 Repositories: gentoo ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-march=native -O2 -pipe" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://snork/gentoo-portage" USE="acl amd64 berkdb bzip2 cli cracklib crypt cxx dri gdbm iconv mmx modules mudflap ncurses nptl openmp pam pcre readline session sse sse2 ssl tcpd unicode zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python3_3" PYTHON_TARGETS="python3_3" RUBY_TARGETS="ruby20" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga nouveau nv r128 radeon savage sis tdfx trident vesa via vmware dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" USE_PYTHON="3.3" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Does this still happen in newer versions? Can't find something on this; and it's quite ironic, given that asynchronous calls like this intend to speed things up rather than slow things down. If you really want to ping this down, you could do a git bisect between 3.7.10 and 3.10.17 using https://wiki.gentoo.org/wiki/Kernel_git-bisect
