Messages in this thread | | | From | Måns Rullgård <> | Subject | Re: [PATCH 0/3] ARM 4Kstacks: introduction | Date | Sat, 22 Oct 2011 14:13:55 +0100 |
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Ming Lei <tom.leiming@gmail.com> writes:
> On Wed, Oct 19, 2011 at 6:51 PM, Arnd Bergmann <arnd@arndb.de> wrote: >> On Tuesday 18 October 2011 17:26:44 Tim Bird wrote: >>> Even inside Sony, usage of 4K stacks is limited >>> to some very special cases, where memory is exceedingly >>> tight (we have one system with 4M of RAM). And we >>> don't mind lopping off features or coding around >>> problem areas to support our special case. >> >> I would imagine that in those cases, you can gain more by reducing the >> number of threads in the system. What is the highest number of >> concurrent threads that you expect in a limited use case with no >> networking or block devices? > > If system run for some time, sometimes it may be difficult for > memory allocator to allocate 2 continuous page frames even there are > many spare page frames in system because of > fragment issue, so the patch does make sense. Anyway, > it provides one option for user to apply 4k stack to avoid > such kind of process creation failure.
Can't page migration be used in these situations?
-- Måns Rullgård mans@mansr.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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