By default the allocator for page frags tries to use high order pages (order-3 on x86). While the default behavior gives good results in most cases, some users might have hit a contention in page allocations/freeing. This was especially true on older kernels (< 5.14) when high-order pages were not stored on per-cpu lists. This allows to opt-in for order-0 allocation instead but is now mostly of historical importance.
Default: 0
There is only one file in this directory. unix_dgram_qlen limits the max number of datagrams queued in Unix domain socket’s buffer. It will not take effect unless PF_UNIX flag is specified.
Please see: Documentation/networking/ip-sysctl.rst and Documentation/admin-guide/sysctl/net.rst for descriptions of these entries.
The /proc/sys/net/appletalk directory holds the Appletalk configuration data when Appletalk is loaded. The configurable parameters are: