Date: Thu, 22 Aug 2013 15:19:13 +0200 From: Zbyszek Bodek <zbb@semihalf.com> To: freebsd-arm@FreeBSD.org Cc: Alan Cox <alc@cs.rice.edu> Subject: Re: Introduction to the superpages support for ARMv6/v7 Message-ID: <52160FD1.7030302@semihalf.com> In-Reply-To: <5214EAE6.6040300@semihalf.com> References: <5214EAE6.6040300@semihalf.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 21.08.2013 18:29, Zbyszek Bodek wrote: > Hello Everyone, > > I'm happy to announce the preliminary patch adding superpages > support for ARMv6/v7 platforms. > > This code is the core part of the "Superpages for ARMv7" project, > sponsored by both Semihalf and The FreeBSD Foundation and developed with > the great support of Alan Cox. > > We'd like to commit these changes before the feature freeze. > Therefore, we would greatly appreciate if you could test the patch on > your ARM-based platforms and send us your feedback as soon as possible. > In addition, please send your remarks and comments if there are any. > > Please check out this location: > http://people.freebsd.org/~raj/patches/arm/superpages/ > > and files: > * 0001-Introduce-preliminary-superpages-support-for-ARMv6-v.patch > - patch based on revision 254596 > * GUPS.tar.gz > - (Giga Updates Per Second) benchmark that can be used to do a quick > preview of the functionality. > > In order to enable superpages utilization one needs to set 'sp_enabled' > sysctl variable (in src or loader). Without that, the kernel is supposed > to work as it was without SP even so the reservation based allocation > mechanism is enabled. > > One can observe superpages statistics using: > sysctl vm.pmap.section > > We have tested this on Armada XP in SMP environment but the presented > support should work on any ARMv6/v7 platform. > > After committing this code we will send a separate e-mail summing up > this work and covering more details. > Hello again, Please check out the updated patch: http://people.freebsd.org/~raj/patches/arm/superpages/0001-Introduce-preliminary-superpages-support-for-ARMv6-v.patch Short info: - Unified SP related functions names to contain _section suffix instead of _superpage. This is to keep the names in sync with sysctl variables, existing functions and for future development when 64KB superpages arrive. - Removed redundant code - We will also add missing pv_chunk list initialization in the separate commit but here this change included to the overall patch. Best regards Zbyszek Bodek
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?52160FD1.7030302>