On Sat, 2017-06-24 at 02:11 -0700, Hugh Dickins wrote: > On Thu, 22 Jun 2017, Hugh Dickins wrote: > > On Thu, 22 Jun 2017, Ben Hutchings wrote: > > > > > Here's my attempt at a backport to 3.2. This is only tested on > > > x86_64 and I think I should introduce local variables for > > > vma_start_gap() in a few places. I had to cherry-pick commit > > > 09884964335e "mm: do not grow the stack vma just because of an overrun > > > on preceding vma" before this one (which was a clean cherry-pick). > > > > Both your speed and your stamina are much better than mine; and your > > patch belies your Sturgeon's law signature. I haven't got beyond the > > architectures yet in my parallel attempt, and you do appear to be > > doing everything right (but a local variable often welcome, yes). > > > > I'm giving up for the night, will contine tomorrow. > > The only discrepancy I notice so far is that I have > > arch/alpha/kernel/osf_sys.c > > arch/ia64/mm/hugetlbpage.c > > arch/sparc/kernel/sys_sparc_32.c > > in my list of changed files, but they're not in yours. > > And here's my attempt at a backport to 3.2.89, at last. > I know it builds and boots and runs on x86 64 and 32, > but that's about all that I've tried. > > If you diff against yours (I preferred not to send that diff, > because of the couple of rejects in yours against 3.2.89), > you'll find most of the difference is just noise from where > I used a variable, but you had not yet done so in yours.
Thanks, this is much nicer.
> But there are those three missing files, and there are a few
> places where I have a little "if (prev) {" block at the head of
> the loop after find_vma_prev(): I think those loops start off
> wrongly without that.
I also failed to update prev.
[...]
> So please at least take a look through the diff from yours, I
> think you'll find a few things to bring in, but a lot to ignore.
I think I'll take most of yours, thanks.
Ben.
--
Ben Hutchings
Sturgeon's Law: Ninety percent of everything is crap.
signature.asc
Description: This is a digitally signed message part
