BugLink: https://bugs.launchpad.net/bugs/1866149
[Impact] systemd-systemctl will fail to set kernel.pid_max, leading to a degraded boot. [Fix] Set CONFIG_BASE_FULL=y, CONFIG_BASE_SMALL=0. [Test case] Write 419304 to /proc/sys/kernel/pid_max. [Potential regression] Boot time may be affected. -- kernel-team mailing list [hidden email] https://lists.ubuntu.com/mailman/listinfo/kernel-team |
BugLink: https://bugs.launchpad.net/bugs/1866149
Which, in turn, leads to CONFIG_BASE_SMALL=0. This turns off some memory savings that linux-kvm carried. Those savings, however, are minimal, and do not justify the runtime penalty and did not account to significant boot time savings. This also lead to a limit in PIDs on the system that caused degraged boot when systemd-sysctl tried to change the default maximum PID. Signed-off-by: Thadeu Lima de Souza Cascardo <[hidden email]> --- debian.kvm/config/config.common.ubuntu | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/debian.kvm/config/config.common.ubuntu b/debian.kvm/config/config.common.ubuntu index cc864334cc25..3bd41a7c3205 100644 --- a/debian.kvm/config/config.common.ubuntu +++ b/debian.kvm/config/config.common.ubuntu @@ -194,8 +194,8 @@ CONFIG_AUTOFS_FS=y # CONFIG_BACKLIGHT_CLASS_DEVICE is not set # CONFIG_BACKTRACE_SELF_TEST is not set CONFIG_BAREUDP=m -# CONFIG_BASE_FULL is not set -CONFIG_BASE_SMALL=1 +CONFIG_BASE_FULL=y +CONFIG_BASE_SMALL=0 # CONFIG_BATMAN_ADV is not set # CONFIG_BATTERY_BQ27XXX is not set # CONFIG_BATTERY_DS2780 is not set -- 2.27.0 -- kernel-team mailing list [hidden email] https://lists.ubuntu.com/mailman/listinfo/kernel-team |
In reply to this post by Thadeu Lima de Souza Cascardo-3
BugLink: https://bugs.launchpad.net/bugs/1866149
Which, in turn, leads to CONFIG_BASE_SMALL=0. This turns off some memory savings that linux-kvm carried. Those savings, however, are minimal, and do not justify the runtime penalty and did not account to significant boot time savings. This also lead to a limit in PIDs on the system that caused degraged boot when systemd-sysctl tried to change the default maximum PID. Signed-off-by: Thadeu Lima de Souza Cascardo <[hidden email]> --- debian.kvm/config/config.common.ubuntu | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/debian.kvm/config/config.common.ubuntu b/debian.kvm/config/config.common.ubuntu index ecad0df5219f..4ef05a669150 100644 --- a/debian.kvm/config/config.common.ubuntu +++ b/debian.kvm/config/config.common.ubuntu @@ -186,8 +186,8 @@ CONFIG_AUTOFS_FS=y # CONFIG_AUXDISPLAY is not set # CONFIG_BACKLIGHT_CLASS_DEVICE is not set # CONFIG_BACKTRACE_SELF_TEST is not set -# CONFIG_BASE_FULL is not set -CONFIG_BASE_SMALL=1 +CONFIG_BASE_FULL=y +CONFIG_BASE_SMALL=0 # CONFIG_BATMAN_ADV is not set # CONFIG_BATTERY_BQ27XXX is not set # CONFIG_BATTERY_DS2780 is not set -- 2.27.0 -- kernel-team mailing list [hidden email] https://lists.ubuntu.com/mailman/listinfo/kernel-team |
In reply to this post by Thadeu Lima de Souza Cascardo-3
BugLink: https://bugs.launchpad.net/bugs/1866149
Which, in turn, leads to CONFIG_BASE_SMALL=0. This turns off some memory savings that linux-kvm carried. Those savings, however, are minimal, and do not justify the runtime penalty and did not account to significant boot time savings. This also lead to a limit in PIDs on the system that caused degraged boot when systemd-sysctl tried to change the default maximum PID. Signed-off-by: Thadeu Lima de Souza Cascardo <[hidden email]> --- debian.kvm/config/config.common.ubuntu | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/debian.kvm/config/config.common.ubuntu b/debian.kvm/config/config.common.ubuntu index fb0f7dc2e543..a650ad095efa 100644 --- a/debian.kvm/config/config.common.ubuntu +++ b/debian.kvm/config/config.common.ubuntu @@ -189,8 +189,8 @@ CONFIG_AUTOFS4_FS=y # CONFIG_AUXDISPLAY is not set # CONFIG_BACKLIGHT_LCD_SUPPORT is not set # CONFIG_BACKTRACE_SELF_TEST is not set -# CONFIG_BASE_FULL is not set -CONFIG_BASE_SMALL=1 +CONFIG_BASE_FULL=y +CONFIG_BASE_SMALL=0 # CONFIG_BATMAN_ADV is not set # CONFIG_BATTERY_BQ27XXX is not set # CONFIG_BATTERY_DS2780 is not set -- 2.27.0 -- kernel-team mailing list [hidden email] https://lists.ubuntu.com/mailman/listinfo/kernel-team |
In reply to this post by Thadeu Lima de Souza Cascardo-3
BugLink: https://bugs.launchpad.net/bugs/1866149
Which, in turn, leads to CONFIG_BASE_SMALL=0. This turns off some memory savings that linux-kvm carried. Those savings, however, are minimal, and do not justify the runtime penalty and did not account to significant boot time savings. This also lead to a limit in PIDs on the system that caused degraged boot when systemd-sysctl tried to change the default maximum PID. Signed-off-by: Thadeu Lima de Souza Cascardo <[hidden email]> --- debian.kvm/config/config.common.ubuntu | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/debian.kvm/config/config.common.ubuntu b/debian.kvm/config/config.common.ubuntu index f5d48d9f154b..debb0a8100d1 100644 --- a/debian.kvm/config/config.common.ubuntu +++ b/debian.kvm/config/config.common.ubuntu @@ -153,8 +153,8 @@ CONFIG_AUTOFS4_FS=y # CONFIG_AUXDISPLAY is not set # CONFIG_BACKLIGHT_LCD_SUPPORT is not set # CONFIG_BACKTRACE_SELF_TEST is not set -# CONFIG_BASE_FULL is not set -CONFIG_BASE_SMALL=1 +CONFIG_BASE_FULL=y +CONFIG_BASE_SMALL=0 # CONFIG_BATMAN_ADV is not set # CONFIG_BCACHE is not set # CONFIG_BCMA is not set -- 2.27.0 -- kernel-team mailing list [hidden email] https://lists.ubuntu.com/mailman/listinfo/kernel-team |
In reply to this post by Thadeu Lima de Souza Cascardo-3
Yup, LGTM. Thadeu, thanks for the explanation in the LP bug about the
possible performance implications. Acked-by: Kamal Mostafa <[hidden email]> -Kamal On Fri, Jan 08, 2021 at 02:48:04PM -0300, Thadeu Lima de Souza Cascardo wrote: > BugLink: https://bugs.launchpad.net/bugs/1866149 > > [Impact] > systemd-systemctl will fail to set kernel.pid_max, leading to a degraded boot. > > [Fix] > Set CONFIG_BASE_FULL=y, CONFIG_BASE_SMALL=0. > > [Test case] > Write 419304 to /proc/sys/kernel/pid_max. > > [Potential regression] > Boot time may be affected. > > > > -- > kernel-team mailing list > [hidden email] > https://lists.ubuntu.com/mailman/listinfo/kernel-team -- kernel-team mailing list [hidden email] https://lists.ubuntu.com/mailman/listinfo/kernel-team |
In reply to this post by Thadeu Lima de Souza Cascardo-3
On 08/01/2021 17:48, Thadeu Lima de Souza Cascardo wrote:
> BugLink: https://bugs.launchpad.net/bugs/1866149 > > [Impact] > systemd-systemctl will fail to set kernel.pid_max, leading to a degraded boot. > > [Fix] > Set CONFIG_BASE_FULL=y, CONFIG_BASE_SMALL=0. > > [Test case] > Write 419304 to /proc/sys/kernel/pid_max. > > [Potential regression] > Boot time may be affected. > > > Acked-by: Colin Ian King <[hidden email]> -- kernel-team mailing list [hidden email] https://lists.ubuntu.com/mailman/listinfo/kernel-team |
In reply to this post by Thadeu Lima de Souza Cascardo-3
Applied to G/F/B/X kvm. thank you!
-Kelsey On 2021-01-08 14:48:04 , Thadeu Lima de Souza Cascardo wrote: > BugLink: https://bugs.launchpad.net/bugs/1866149 > > [Impact] > systemd-systemctl will fail to set kernel.pid_max, leading to a degraded boot. > > [Fix] > Set CONFIG_BASE_FULL=y, CONFIG_BASE_SMALL=0. > > [Test case] > Write 419304 to /proc/sys/kernel/pid_max. > > [Potential regression] > Boot time may be affected. > > > > -- > kernel-team mailing list > [hidden email] > https://lists.ubuntu.com/mailman/listinfo/kernel-team -- kernel-team mailing list [hidden email] https://lists.ubuntu.com/mailman/listinfo/kernel-team |
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