From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752060Ab1DGNMz (ORCPT ); Thu, 7 Apr 2011 09:12:55 -0400 Received: from mo-p00-ob.rzone.de ([81.169.146.162]:16559 "EHLO mo-p00-ob.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751562Ab1DGNMy (ORCPT ); Thu, 7 Apr 2011 09:12:54 -0400 X-RZG-AUTH: :P2EQZWCpfu+qG7CngxMFH1J+zrwiavkK6tmQaLfmztM8TOFIiy0PGjDB X-RZG-CLASS-ID: mo00 Date: Thu, 7 Apr 2011 15:12:50 +0200 From: Olaf Hering To: =?utf-8?Q?Am=C3=A9rico?= Wang Cc: linux-kernel@vger.kernel.org, kexec@lists.infradead.org Subject: Re: dynamic oldmem in kdump kernel Message-ID: <20110407131250.GA1571@aepfle.de> References: <20110407095646.GA30788@aepfle.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 07, Américo Wang wrote: > On Thu, Apr 7, 2011 at 5:56 PM, Olaf Hering wrote: > > Another issue, slightly related, is memory hotplug. > > How is this currently handled for kdump?  Is there code which > > automatically reconfigures the kdump kernel with the new memory ranges? > > > > No, the crashkernel memory is reserved during boot, and it is static after > that (except you can shrink this memory via /sys). I meant the overall amount of memory changed by memory hotplug events, not the small memory range for the crash kernel itself. > Kdump isn't aware of memory hotplug. Ok. Perhaps there are hotplug events where a helper script could run something like 'rckdump restart'. Olaf From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mo-p00-ob.rzone.de ([81.169.146.162]) by canuck.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1Q7p18-0007HB-19 for kexec@lists.infradead.org; Thu, 07 Apr 2011 13:13:02 +0000 Date: Thu, 7 Apr 2011 15:12:50 +0200 From: Olaf Hering Subject: Re: dynamic oldmem in kdump kernel Message-ID: <20110407131250.GA1571@aepfle.de> References: <20110407095646.GA30788@aepfle.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: =?utf-8?Q?Am=C3=A9rico?= Wang Cc: kexec@lists.infradead.org, linux-kernel@vger.kernel.org T24gVGh1LCBBcHIgMDcsIEFtw6lyaWNvIFdhbmcgd3JvdGU6Cgo+IE9uIFRodSwgQXByIDcsIDIw MTEgYXQgNTo1NiBQTSwgT2xhZiBIZXJpbmcgPG9sYWZAYWVwZmxlLmRlPiB3cm90ZToKPiA+IEFu b3RoZXIgaXNzdWUsIHNsaWdodGx5IHJlbGF0ZWQsIGlzIG1lbW9yeSBob3RwbHVnLgo+ID4gSG93 IGlzIHRoaXMgY3VycmVudGx5IGhhbmRsZWQgZm9yIGtkdW1wPyDCoElzIHRoZXJlIGNvZGUgd2hp Y2gKPiA+IGF1dG9tYXRpY2FsbHkgcmVjb25maWd1cmVzIHRoZSBrZHVtcCBrZXJuZWwgd2l0aCB0 aGUgbmV3IG1lbW9yeSByYW5nZXM/Cj4gPgo+IAo+IE5vLCB0aGUgY3Jhc2hrZXJuZWwgbWVtb3J5 IGlzIHJlc2VydmVkIGR1cmluZyBib290LCBhbmQgaXQgaXMgc3RhdGljIGFmdGVyCj4gdGhhdCAo ZXhjZXB0IHlvdSBjYW4gc2hyaW5rIHRoaXMgbWVtb3J5IHZpYSAvc3lzKS4KCkkgbWVhbnQgdGhl IG92ZXJhbGwgYW1vdW50IG9mIG1lbW9yeSBjaGFuZ2VkIGJ5IG1lbW9yeSBob3RwbHVnIGV2ZW50 cywKbm90IHRoZSBzbWFsbCBtZW1vcnkgcmFuZ2UgZm9yIHRoZSBjcmFzaCBrZXJuZWwgaXRzZWxm LgoKPiBLZHVtcCBpc24ndCBhd2FyZSBvZiBtZW1vcnkgaG90cGx1Zy4KCk9rLiAgUGVyaGFwcyB0 aGVyZSBhcmUgaG90cGx1ZyBldmVudHMgd2hlcmUgYSBoZWxwZXIgc2NyaXB0IGNvdWxkIHJ1bgpz b21ldGhpbmcgbGlrZSAncmNrZHVtcCByZXN0YXJ0Jy4KCk9sYWYKCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmtleGVjIG1haWxpbmcgbGlzdAprZXhlY0Bs aXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlz dGluZm8va2V4ZWMK