> On 9 Jan 2019, at 16.30, Kanchan Joshi <[email protected]> wrote: > > Exiting write-hints are exposed to user-mode. There is a possiblity > of conflict if kernel happens to use those. This patch introduces four > write-hints for exclusive kernel-mode use. > > Signed-off-by: Kanchan Joshi <[email protected]> > --- > include/linux/fs.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/include/linux/fs.h b/include/linux/fs.h > index 811c777..e8548eb 100644 > --- a/include/linux/fs.h > +++ b/include/linux/fs.h > @@ -291,6 +291,11 @@ enum rw_hint { > WRITE_LIFE_MEDIUM = RWH_WRITE_LIFE_MEDIUM, > WRITE_LIFE_LONG = RWH_WRITE_LIFE_LONG, > WRITE_LIFE_EXTREME = RWH_WRITE_LIFE_EXTREME, > +/* below ones are meant for in-kernel use */ > + KERN_WRITE_LIFE_SHORT, > + KERN_WRITE_LIFE_MEDIUM, > + KERN_WRITE_LIFE_LONG, > + KERN_WRITE_LIFE_EXTREME > }; >
I think Jens and Dave meant kernel hints to go top down. This would also give space for supporting more hints / streams from both ends for user and kernel. Javier
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