MAN page from Mandrake Other man-pages-gz-1.21-2.noarch.rpm
BDFLUSH
Section: Linux Programmer's Manual (2)
Updated: 15 April 1995
Index NAME
bdflush - start, flush, or tune buffer-dirty-flush daemon
SYNOPSIS
int bdflush(int func, long *address);int bdflush(int func, long data);
DESCRIPTION
bdflushstarts, flushes, or tunes the buffer-dirty-flush daemon.Only the super-user may call
bdflush.
Iffuncis negative or 0, and no daemon has been started, thenbdflushenters the daemon code and never returns.
Iffuncis 1,some dirty buffers are written to disk.
Iffuncis 2 or more and is even (low bit is 0), thenaddressis the address of a long word,and the tuning parameter numbered(func-2)/2is returned to the caller in that address.
Iffuncis 3 or more and is odd (low bit is 1), thendatais a long word,and the kernel sets tuning parameter numbered(func-3)/2to that value.
The set of parameters, their values, and their legal rangesare defined in the kernel source filefs/buffer.c.
RETURN VALUE
If
funcis negative or 0 and the daemon successfully starts,
bdflushnever returns.Otherwise, the return value is 0 on success and -1 on failure, with
errnoset to indicate the error.
ERRORS
- EPERM
- Caller is not super-user.
- EFAULT
- addresspoints outside your accessible address space.
- EBUSY
- An attempt was made to enter the daemon code afteranother process has already entered.
- EINVAL
- An attempt was made to read or write an invalid parameter number,or to write an invalid value to a parameter.
CONFORMING TO
bdflush is Linux specific and should not be used in programsintended to be portable.
SEE ALSO
fsync(2),
sync(2),
update(8),
sync(8).
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- RETURN VALUE
- ERRORS
- CONFORMING TO
- SEE ALSO
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