Date: Thu, 20 Oct 2011 22:25:59 +0300 From: =?windows-1251?B?yu7t/Oru4iDF4uPl7ejp?= <kes-kes@yandex.ru> To: Alan Cox <alc@rice.edu> Cc: alc@FreeBSD.org, freebsd-bugs@FreeBSD.org, Remko Lodder <remko@elvandar.org> Subject: Re[2]: kern/161721: [boot] compiling kernel with KVA_PAGES=512 does not allow system to boot Message-ID: <513697747.20111020222559@yandex.ru> In-Reply-To: <4EA05A2E.7060705@rice.edu> References: <201110181827.p9IIRGtG004577@freefall.freebsd.org> <1122501234.20111019215502@yandex.ru> <13D22030-AEB8-4E1A-940C-FA532480FF90@elvandar.org> <4EA05A2E.7060705@rice.edu>
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Hi > On 10/19/2011 15:58, Remko Lodder wrote: Hello Kes, Thank you for responding to my closure. Sadly the PR list should contain only Problem REcords (PR's) so personally I do not think a wish list item should be kept open. Actually, as I think, may be I have wrong, but I think so. I have a 'Problem' so I 'Report' it. Thank you for your attention. > Though, we might want to ask Alan whether this is something we can and will work at or not. If the latter, well it's a pity but then we won't work on it. Kes, Your problem report doesn't include any details on the panic that occurs. Could you please provide this? [1]http://www.freebsd.org/cgi/query-pr.cgi?pr=161458 Here I make new slice and compile and install world and kernel to that slice and trying to boot from it. I get system halted on this stage: Oct 10 13:52:22 syslogd: kernel boot file is /boot/kernel/kernel Oct 10 13:52:22 kernel: Copyright (c) 1992-2011 The FreeBSD Project. Oct 10 13:52:22 kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 Oct 10 13:52:22 kernel: The Regents of the University of California. All rights reserved. Oct 10 13:52:22 kernel: FreeBSD is a registered trademark of The FreeBSD Foundation. Oct 10 13:52:22 kernel: FreeBSD 9.0-BETA2 #11: Thu Oct 6 18:02:28 EEST 2011 Oct 10 13:52:22 kernel: @:/usr/obj/usr/src/sys/KES_KERN_v9 i386 But as I discover later it was a bug (problem) with KVA_PAGES, I have added that option to GENERIC and in new installed slice I have no /boot/loader.conf file, so system is halt. on old slice I have /boot/loader.conf, so I have no problem with KVA_PAGES option. I know, that FreeBSD automatically reboot if something nasty is happen. but in this case even no coredumps are present. > Is this problem occurring with or without the use of PAE? If I presume that you are not using PAE, then setting KVA_PAGES to 512 makes the kernel address space 2 GB in size. Have you ever tried a slightly smaller setting for KVA_PAGES, for example, 508? Ok, I will try 508 and report results. > Remko, I suspect this a bug, specifically, arithmetic overflow is occurring somewhere because 32-bit arithmetic is being used and the kernel address space is 2^31 bytes in size. I would recommend that you reopen this PR, and assign it to me. While you can certainly shoot yourself in the foot by messing with low-level configuration, like KVA_PAGES, in this case, I think we may have a bug. I do not know how to reopen, there is no any such button // (( Please describe where I can read about how to reopen? > Alan On Oct 19, 2011, at 8:55 PM, Kon'kov Evgenij wrote: rFo> Synopsis: [boot] compiling kernel with KVA_PAGES=512 does not allow system to boot rFo> State-Changed-From-To: open->closed rFo> State-Changed-By: remko rFo> State-Changed-When: Tue Oct 18 18:27:15 UTC 2011 rFo> State-Changed-Why: rFo> If you fiddle with kernel settings you should be aware of what you are rFo> doing. The KVA pages is a problem that popped up before and is mentioned rFo> enough. I do not think this is a PR worth, apologies if this offends rFo> you. rFo> [2]http://www.freebsd.org/cgi/query-pr.cgi?pr=161721 This is option to make FreeBSD better, so may be some developer in future see this weakness and implements that. If it will be closes it will be fogotten So may be reopen it with very low priority as wish list, not PR Thank you -- S uvazheniem, Kon'kov [3]mailto:kes-kes@yandex.ru -- /"\ With kind regards, | [4]remko@elvandar.org \ / Remko Lodder | [5]remko@FreeBSD.org X FreeBSD | [6]http://www.evilcoder.org / \ The Power to Serve | Quis custodiet ipsos custodes -- S uvazheniem, Kon'kov [7]mailto:kes-kes@yandex.ru References 1. http://www.freebsd.org/cgi/query-pr.cgi?pr=161458 2. http://www.freebsd.org/cgi/query-pr.cgi?pr=161721 3. mailto:kes-kes@yandex.ru 4. mailto:remko@elvandar.org 5. mailto:remko@FreeBSD.org 6. http://www.evilcoder.org/ 7. mailto:kes-kes@yandex.ru
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