Re: [Crash-utility] [RFI] Support Fujitsu's sadump dump format

Hi Hatayama-san, On 2011/06/30 16:25:07 +0900, HATAYAMA Daisuke <d.hatayama(a)jp.fujitsu.com&gt; wrote: > Hello Tachibana-san, > > Thanks for your replying. > > From: tachibana(a)mxm.nes.nec.co.jp > Subject: Re: [Crash-utility] [RFI] Support Fujitsu's sadump dump format > Date: Thu, 30 Jun 2011 14:58:46 +0900 > > > Hi Hatayama-san, > > > > On 2011/06/29 12:12:18 +0900, HATAYAMA Daisuke <d.hatayama(a)jp.fujitsu.com&gt; wrote: > >> From: Dave Anderson <anderson(a)redhat.com&gt; > >> Subject: Re: [Crash-utility] [RFI] Support Fujitsu's sadump dump format > >> Date: Tue, 28 Jun 2011 08:57:42 -0400 (EDT) > >> > >> > > >> > > >> > ----- Original Message ----- > >> >> Fujitsu has stand-alone dump mechanism based on firmware level > >> >> functionality, which we call SADUMP, in short. > >> >> > >> >> We've maintained utility tools internally but now we're thinking that > >> >> the best is crash utility and makedumpfile supports the sadump format > >> >> for the viewpoint of both portability and maintainability. > >> >> > >> >> We'll be of course responsible for its maintainance in a continuous > >> >> manner. The sadump dump format is very similar to diskdump format and > >> >> so kdump (compressed) format, so we estimate patch set would be a > >> >> relatively small size. > >> >> > >> >> Could you tell me whether crash utility and makedumpfile can support > >> >> the sadump format? If OK, we'll start to make patchset. > > > > I think it's not bad to support sadump by makedumpfile. However I have > > several questions. > > - Do you want to use makedumpfile to make an existing file that sadump has > > dumped small? > > Of couse, it's one of the purposes. It's useful feature. > > The first is to translate sadump format into the one crash utility can > recognize. makedumpfile is the standard tool to do it, and if > makdumpfile can support sadump format, I think it is the best. > > > - It isn't possible to support the same form as kdump-compressed format > > now, is it? > > I think it's technically possible but practically impossible. sadump is > a firmware and it is maintained by firmware team. > > > - When the information that makedumpfile reads from a note of /proc/vmcore > > (or a header of kdump-compressed format) is added by an extension of > > makedumpfile, do you need to modify sadump? > > Sorry, I've not investigated makedumpfile implementation enough yet. > > But if I understand correctly, the current note information contained > in kdump-compressed format is NT_PRSTATUS and VMCOREINFO only, and for > them, sadump doesn't need to be modified. But it might need to be > modified if another kind of note is newly added. Thank you for your explanation. I understood. I will merge patches for sadump if you will post them.