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This package increases the default limit of the ancillary buffer size per kernel socket defined in `net.core.optmem_max` to 81920 bytes. For this preset to become active it requires a reboot after the installation of this package. You can also manually increase this limit by invocing `sysctl net.core.optmem_max=81920` as the super-user, e.g. using `su` or `sudo` on the terminal. This is done to provide consumers of the new Linux Kernel Crypto API User Space Interface a well sufficient and reasonable maximum limit by default, especially when using AIO with a larger amount of IOVECs. For further information about the AF_ALG kernel socket and AIO, see the discussion at the kernel-crypto mailing-list: https://www.mail-archive.com/linux-crypto@vger.kernel.org/msg30417.html See the instructions given in '/usr/lib/sysctl.d/50-default.conf', if you need or want to override the preset made by this package.