Date: Thu, 14 Sep 2017 21:51:17 +0200 From: Andreas Tobler <andreast@FreeBSD.org> To: Mark Johnston <markj@FreeBSD.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r323290 - head/sys/vm Message-ID: <c25a9965-b665-51ad-abe6-71beb2ae0440@FreeBSD.org> In-Reply-To: <201709072143.v87Lhdsg060310@repo.freebsd.org>
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Hi Mark, On 07.09.17 23:43, Mark Johnston wrote: > Author: markj > Date: Thu Sep 7 21:43:39 2017 > New Revision: 323290 > URL: https://svnweb.freebsd.org/changeset/base/323290 > > Log: > Speed up vm_page_array initialization. > > We currently initialize the vm_page array in three passes: one to zero > the array, one to initialize the "order" field of each page (necessary > when inserting them into the vm_phys buddy allocator one-by-one), and > one to initialize the remaining non-zero fields and individually insert > each page into the allocator. > > Merge the three passes into one following a suggestion from alc: > initialize vm_page fields in a single pass, and use vm_phys_free_contig() > to efficiently insert physical memory segments into the buddy allocator. > This reduces the initialization time to a third or a quarter of what it > was before on most systems that I tested. > > Reviewed by: alc, kib > MFC after: 3 weeks > Differential Revision: https://reviews.freebsd.org/D12248 > > Modified: > head/sys/vm/vm_page.c > head/sys/vm/vm_phys.c > head/sys/vm/vm_phys.h I just found out that this commit breaks booting my powerpc64 Quad G5. It hangs, pressing ctrl-t shows: cmd: sh [*vm active pagequeue]. Sometimes it hangs earlier when the kbd is not there yet (usb), then I can't get the process/task where it hangs. Note, this kernel is compiled with the default gcc (4.2.1-FreeBSD) Any ideas how to find out what's wrong? The previous revision, r323289 seems stable, at least it survived several kernel builds. TIA, Andreashome | help
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