Unable to set kernel.shmmni to a value greated than 32k (32768)
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Adding for example kernel.shmmni=65536 to /etc/sysctl.conf results in systemd-sysctl service failure to apply kernel variables.
Also, manually calling the same values fail :
# sysctl -w kernel.shmmni=65536 sysctl: setting key "kernel.shmmni": Invalid argument kernel.shmmni = 65536
Append ipcmni_extend to GRUB_CMDLINE_LINUX and run
to update the bootloader settings. On the next boot:
# sysctl -w kernel.shmmni=65536
will be applied correctly.
The following kernel commit rectified that :
6730e6580177d: ipc: IPCMNI limit check for msgmni and shmmni
And added the possibility to increase the IPCMNI limit from 32k to 8M if the users really want the extended value, and that can be achieved by adding 'ipcmni_extend' to the kernel boot parameters.
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- Document ID:000020403
- Creation Date: 01-Oct-2021
- Modified Date:06-Oct-2021
- SUSE Linux Enterprise Server
- SUSE Linux Enterprise Server for SAP Applications
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