25.03.2019 21:12, Ian Lepore wrote: > On Mon, 2019-03-25 at 05:42 -0700, Cy Schubert wrote: >> In message <201903250746.x2p7kkuu019...@repo.freebsd.org>, Allan >> Jude >> writes: >>> Author: allanjude >>> Date: Mon Mar 25 07:46:20 2019 >>> New Revision: 345491 >>> URL: https://svnweb.freebsd.org/changeset/base/345491 >>> >>> Log: >>> Make TMPFS_PAGES_MINRESERVED a kernel option >>> >>> TMPFS_PAGES_MINRESERVED controls how much memory is reserved for >>> the system >>> and not used by tmpfs. >>> >>> On very small memory systems, the default value may be too high >>> and this >>> prevents these small memory systems from using reroot, which is >>> required >>> for them to install firmware updates. >>> >>> Submitted by: Hiroki Mori <yamori...@yahoo.co.jp> >>> Reviewed by: mizhka >>> Differential Revision: https://reviews.freebsd.org/D13583 >>> >>> Modified: >>> head/sys/conf/options >>> head/sys/fs/tmpfs/tmpfs.h >>> head/sys/fs/tmpfs/tmpfs_vfsops.c >>> head/sys/modules/tmpfs/Makefile >>> >> >> Would this be a good candidate for a sysctl or tuneable? >> > > The small-memory embedded systems most affected by this often don't use > loader(8) at all, so tunables aren't an option, and sysctl may be too > late. No reason it can't be a tunable as well, but it'll probably need > to remain as a compile-time option too.
Despite of absense of loader(8), such system still can use our device.hints(5) compiled in-kernel. For example, geom_map(4) is useful for embedded systems booted with U-Boot and geom_map uses hints extensively. _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
