NAME

       bdflush - start, flush, or tune buffer-dirty-flush daemon

SYNOPSIS

       #include <sys/kdaemon.h>

       int bdflush(int func, long data);

DESCRIPTION

       This  system call used to turn the calling process into the bdflush daemon, or tune it, or flush the "old
       buffers".  It then progressively lost all of that functionality.

       See fs/buffer.c in the kernel version you're interested in to see what it actually does there.

ERRORS

       ENOSYS (this system call is unimplemented)

STANDARDS

       Linux.

HISTORY

       This system call was introduced in Linux 1.1.3, became  effectively  obsolete  in  Linux  1.3.50,  mostly
       useless  in  Linux  2.3.23,  entirely useless in Linux 2.5.12, officially deprecated in Linux 2.5.52, and
       removed outright in Linux 5.15.

       Sometimes, if func was even, data actually represented a pointer.

       The header and prototype were removed in glibc 2.23.

SEE ALSO

       sync(1), fsync(2), sync(2)

Linux man-pages 6.15                               2025-05-17                                         bdflush(2)