Re: is flock broken in 2.4 or 2.5 kernels or what does this mean?

[Andrea Arcangeli]

On Tue, Jul 23, 2002 at 05:31:12PM +0100, Alan Cox wrote:
> On Tue, 2002-07-23 at 15:41, John Covici wrote:
> > In the latest release notes of sendmail I have read the following:
> > 
> > 		NOTE: Linux appears to have broken flock() again.  Unless
> > 			the bug is fixed before sendmail 8.13 is shipped,
> > 			8.13 will change the default locking method to
> > 			fcntl() for Linux kernel 2.4 and later.  You may
> > 			want to do this in 8.12 by compiling with
> > 			-DHASFLOCK=0.  Be sure to update other sendmail
> > 			related programs to match locking techniques.
> > 
> > Can anyone tell me what this is all about -- is there any basis in
> > reality for what they are saying?
> 
> First I've heard of it, so it would be useful if someone has access to
> the sendmail problem report/test in question that shows it and I'll go
> find out.

fix is in -aa from Matthew Wilcox:

	http://www.us.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.19rc3aa1/00_drop-broken-flock-account-1

fcntl API never obeyed to the accounting anyways.

Andrea