On Wed, Aug 23, 2006 at 10:56:24PM +0400, Evgeniy Polyakov ([email protected]) wrote:
> > It can be done by selecting special event type, which in turn will reuse
> > special fields as length.
> > But variable-sized members can not be put into cache and without
> > knowledge of it's size it is impossible to put htem into mapped buffer.
>
> And thinking more about this issue, I can say that I'm again
> variable-sized structures - they can not be placed into ring buffer (at
> least into simple one), they do not allow allocation from cache, it is
> impossible to get them correctly from userspace if there is now exact
> knowledge about nature of that events and a lot of other problems.
> If one strongly feels that it is required, it is possible to provide
> userspace pointer in the ukevent structure, which then can be read in
> ->enqueue callback by kernelside (there is similar trick in network
> AIO).
I've reread my text - sorry for tons of errors, I use extremely slow
GPRS link, so it is almost impossible to return and correct errors using
it, I think it is simple to understand what I meant :)
--
Evgeniy Polyakov
-
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]
