On Tue, 4 Sep 2007, Michael Kerrisk wrote:
> Hi Davide,
>
> > > <wakes up>
> > >
> > > I'd have thought that the existing stuff would be near-useless without
> > > the capabilities which you describe?
> >
> > Useless like it'd be a motorcycle w/out a cup-holder :)
> > Seriously, the ability to get the previous values from "something" could
> > have a meaning if this something is a shared global resource (like
> > signals
> > for example). In the timerfd case this makes little sense, since you can
> > create as many timerfd as you like and you do not need to share a single
> > one by changing/restoring the original context.
>
> However, one can have multipe POSIX timers, just as you can
> have multiple timerfd timers; nevertheless POSIX timers provide
> the get and get-while-setting functionality.
The fact that POSIX defined a certain API in a given way, does not
automatically mean that every other API has to look exactly like that.
POSIX has the tendency to bloat things up at times ;)
> > and in terms of kernel code footprint.
>
> Not sure what your concern is here. The total amount of
> new code for all of these options is pretty small.
>From your patch:
fs/compat.c | 34 ++++++++--
fs/timerfd.c | 147 +++++++++++++++++++++++++++++++++++++++--------
include/linux/compat.h | 3
include/linux/syscalls.h | 3
4 files changed, 153 insertions(+), 34 deletions(-)
And the API definition becomes pretty messy. The other way is to add new
system calls. 120+ lines of code more of new system calls wouldn't even be
a problem in itself, if the added value was there.
IMO, as I already said, the added value does not justify them.
- Davide
-
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]
