Date: Mon, 30 Oct 2006 16:12:41 -0500 From: John Baldwin <jhb@freebsd.org> To: Ruslan Ermilov <ru@freebsd.org> Cc: cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/boot/common load_elf.c src/sys/boot/i386/boot2 boot2.c src/sys/boot/i386/libi386 elf32_freebsd.c src/sys/boot/pc98/boot2 boot.c Message-ID: <200610301612.42357.jhb@freebsd.org> In-Reply-To: <20061030210442.GB27957@rambler-co.ru> References: <200610291450.k9TEowL4034801@repoman.freebsd.org> <200610301155.55597.jhb@freebsd.org> <20061030210442.GB27957@rambler-co.ru>
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On Monday 30 October 2006 16:04, Ruslan Ermilov wrote: > On Mon, Oct 30, 2006 at 11:55:54AM -0500, John Baldwin wrote: > > On Sunday 29 October 2006 09:50, Ruslan Ermilov wrote: > > > ru 2006-10-29 14:50:58 UTC > > > > > > FreeBSD src repository > > > > > > Modified files: > > > sys/boot/common load_elf.c > > > sys/boot/i386/boot2 boot2.c > > > sys/boot/i386/libi386 elf32_freebsd.c > > > sys/boot/pc98/boot2 boot.c > > > Log: > > > Because the BTX mini-kernel now uses flat memory mode and clients > > > are no longer limited to a virtual address space of 16 megabytes, > > > only mask high two bits of a virtual address. This allows to load > > > larger kernels (up to 1 gigabyte). Not masking addresses at all > > > was a bad idea on machines with less than >3G of memory -- kernels > > > are linked at 0xc0xxxxxx, and that would attempt to load a kernel > > > at above 3G. By masking only two highest bits we stay within the > > > safe limits while still allowing to boot larger kernels. > > > > > > (This is a safer reimplmentation of sys/boot/i386/boot2/boot.2.c > > > rev. 1.71.) > > > > > > Prodded by: jhb > > > Tested by: nyan (pc98) > > > > Thanks! > > > Do you think it would be a good idea to MFC this in time for 6.2? I think so, but see my other e-mail, I think it should mask 4 bits rather than just 2. -- John Baldwin
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