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Annotated edit history of bdflush(2) version 2, including all changes. View license author blame.
Rev Author # Line
1 perry 1 BDFLUSH
2 !!!BDFLUSH
2 PerryLorier 3
1 perry 4 ----
5 !!NAME
6
7
8 bdflush - start, flush, or tune buffer-dirty-flush daemon
9 !!SYNOPSIS
10
2 PerryLorier 11 __int bdflush(int__ ''func,'' __long *__''address);
12 ''__int bdflush(int__ ''func,'' __long__ ''data);''
1 perry 13 !!DESCRIPTION
14
15
16 __bdflush__ starts, flushes, or tunes the
17 buffer-dirty-flush daemon. Only the super-user may call
18 __bdflush__.
19
20
21 If ''func'' is negative or 0, and no daemon has been
22 started, then __bdflush__ enters the daemon code and
23 never returns.
24
25
26 If ''func'' is 1, some dirty buffers are written to
27 disk.
28
29
30 If ''func'' is 2 or more and is even (low bit is 0), then
31 ''address'' is the address of a long word, and the tuning
32 parameter numbered (''func''-2)/2 is returned to the
33 caller in that address.
34
35
36 If ''func'' is 3 or more and is odd (low bit is 1), then
37 ''data'' is a long word, and the kernel sets tuning
38 parameter numbered (''func''-3)/2 to that
39 value.
40
41
42 The set of parameters, their values, and their legal ranges
43 are defined in the kernel source file
44 ''fs/buffer.c''.
45 !!RETURN VALUE
46
47
48 If ''func'' is negative or 0 and the daemon successfully
49 starts, __bdflush__ never returns. Otherwise, the return
50 value is 0 on success and -1 on failure, with ''errno''
51 set to indicate the error.
52 !!ERRORS
53
54
2 PerryLorier 55 ;[EPERM]: Caller is not super-user.
56 ;[EFAULT]: ''address'' points outside your accessible address space.
57 ;[EBUSY]: An attempt was made to enter the daemon code after another process has already entered.
58 ;[EINVAL]: An attempt was made to read or write an invalid parameter number, or to write an invalid value to a parameter.
1 perry 59
60 !!CONFORMING TO
2 PerryLorier 61 __bdflush__ is Linux specific and should not be used in programs intended to be portable.
1 perry 62 !!SEE ALSO
63
64
2 PerryLorier 65 fsync(2), sync(2), update(8), sync(8)
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