From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 23 Sep 1999 14:55:01 -0700 (PDT) From: "H. Peter Anvin" Subject: Re: syslinux-1.43 bug [and possible PATCH] In-Reply-To: <199909232109.OAA13866@google.engr.sgi.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Kanoj Sarcar Cc: syslinux@linux.kernel.org, linux-mm@kvack.org, linux-kernel@vger.rutgers.edu List-ID: This is an old bug; it has been fixed since 1.44 or 1.45. The current version is 1.47. -hpa On Thu, 23 Sep 1999, Kanoj Sarcar wrote: > I have a possible problem to report with syslinux, and a suggested > fix. Please send me comments and feedback at kanoj@engr.sgi.com, > since I am not subscribed to the syslinux or kernel lists. > > While installing linux (RedHat6.0, SuSe, Mandrake etc) on a ia32 > Compaq box with 1.5Gb memory, I have observed kernel panics from > mount_root. On further investigation, syslinux decides to put initrd > at a high physical address, which the Linux kernel, compiled with > PAGE_OFFSET=0xc0000000 can not access. The kernel can access at > the most physical address 0x3c000000, whereas syslinux/ldlinux.asm > can put initrd as high as HIGHMEM_MAX=0x3f000000. This leads > setup_arch() to decide it can not use initrd, thus causing the > kernel panic. > > The easy fix to me seems to be to change HIGHMEM_MAX in > syslinux/ldlinux.asm to 0x3c000000. In fact, I have verified on > a couple of machines that this will let the installation proceed. > > Have other people run into this problem and worked around it some > other way? (One way would be to specify mem= at the boot: prompt > from syslinux. Yet another way seems to be to specify mem= in > the syslinux.cfg file. Changing HIGHMEM_MAX seems to be the cleanest, > although I am not sure whether this will impact the capability of > syslinux to install other os'es). > > Thanks. > > Kanoj > kanoj@engr.sgi.com > at work, in private! -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://humbolt.geo.uu.nl/Linux-MM/