On Mon, Dec 14, 2015 at 04:32:34PM +0100, Quentin Casasnovas wrote: > > > > growsup/down stand for stack usage iirc, so it was intentionally > > not accounted here. > > > > Right, but in the same vein of Linus saying RLIMIT_DATA is/was useless > because everyone could use mmap() instead of brk() to get anonymous memory, > what's the point of restricting "almost-all" anonymous memory if one can > just use MAP_GROWSDOWN/UP and cause repeated page faults to extend that > mapping, circumventing your checks? That makes the new restriction as > useless as what RLIMIT_DATA used to be, doesn't it?
Not as it were before, but true, using growsdown/up will give a way to allocate memory not limited byt rlimit-data. (Also I just noted that I modified mm.h as well, where anon_accountable_mapping was implemented but forgot to add it into quilt, so this patch on its own won't compile, don't apply it). > > > > > > I only had a quick look so apologies if this is handled and I missed it :) > > > > thanks for feedback! also take a look on Kostya's patch, I think it's > > even better approach (and I like it more than mine). > > Ha I'm not subscribed to LKML so I missed those, I suppose you can ignore > my comments then! :) https://lkml.org/lkml/2015/12/14/72 Take a look. -- 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/
