ref: c783e39350d85a0cf35fa1d7c3864ff64f3f48f3
dir: /sys/man/8/swap/
.TH SWAP 8 .SH NAME swap \- establish a swap file .SH SYNOPSIS .B swap .I file .SH DESCRIPTION .I Swap establishes a file or device for the system to swap on. If .I file is a device, the device is used directly; if a directory, a unique file is created in that directory on which to swap. The environment variable .B swap is set to the full name of the resulting file. The number of blocks available in the file or device must be at least the number of swap blocks configured at system boot time. .PP If a swap channel has already been set and no blocks are currently valid in the file the old file will be closed and then replaced. If any blocks are valid on the device an error is returned instead. .SH SOURCE .B /sys/src/cmd/swap.c .SH BUGS Swapping to a file served by a local user-level process, such as .IR kfs (4), can lead to deadlock; use raw devices or remote files instead.