SEGFLUSH(2) System Calls Manual SEGFLUSH(2)
NAME
segflush - flush instruction and data caches
SYNOPSIS
#include <u.h>
#include <libc.h>
int segflush(void *va, ulong len)
DESCRIPTION
Segflush invalidates any instruction cache and writes back any data cache associated with pages contained in a segment. All subsequent new
pages in the segment will also be flushed when first referenced.
Va is an address within the segment to be flushed; it is rounded down to the nearest page boundary. Len specifies the length in bytes of
the memory to flush; va+len is rounded up to the nearest page boundary. Segflush works correctly when the memory straddles multiple seg-
ments.
Correct use of segflush depends on an understanding of the cache architecture of the specific machine.
SOURCE
/sys/src/libc/9syscall
SEE ALSO
segattach(2), segbrk(2)
/proc/*/segment
DIAGNOSTICS
Sets errstr.
SEGFLUSH(2)
