On Thu, Nov 10, 2005 at 05:15:56PM +0000, Alan Cox wrote:
> On Iau, 2005-11-10 at 11:31 -0500, Peter Staubach wrote:
> > Clearly, the timeout calculations problem can be fixed without changing
> > the arguments to the sys_poll() routine. However, it is cleaner to fix
> > it this way by ensuring the sizes and types of arguments match.
>
> There really is no need for the kernel API to match the userspace one,
> many of our others differ between the syscall interface which is most
> definitely 'exported' in one sense and the POSIX interface which is
> defined by libc, posix and the LSB etc
>
> No argument about the timeout fix.
I posted a different fix here about a month ago (but I sent it 3 times,
as it was twice wrong). Andrew was about to merge it in his tree but I
have not checked yet. It was different in the sense that it used
msecs_to_jiffies() to do the arithmetic in the best possible way depending
on the HZ value and the ints size. Most of the time (when 1000 % HZ == 0),
it will simplify the operations to a single divide by a constant and
correctly check for integer overflows. Eg, with HZ=250, a simple 2 bits
right shift will replace a multiply followed by an divide.
I'll check whether 2.6.14-mm1 has it, otherwise I can repost it.
Cheers,
Willy
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
