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Subject: Re: [concept & "good taste" review] persistent store
From: Huang Ying <ying.huang@intel.com>
To: Tony Luck <tony.luck@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>,
        Linus Torvalds <torvalds@linux-foundation.org>,
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Date: Tue, 21 Dec 2010 08:48:14 +0800
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On Tue, 2010-12-21 at 01:19 +0800, Tony Luck wrote:
> On Sun, Dec 19, 2010 at 6:47 PM, Huang Ying <ying.huang@intel.com> wrote:
> > 8KB is about 100-200 lines message, sometimes it may be not enough for
> > all necessary information.  But in fact, we can use multiple ERST
> > records to save one kernel message dumping. So the real limitation is
> > just total storage capacity.
> 
> We can - but it will be a bit messy within my pstore + platform driver
> framework (I'd have to have erst tell pstore that it could handle some
> larger size, 2x or 3x the actual record size and then break a write
> into pieces. Presumably re-assemble on the read side too).

If persistent storage driver (such as ERST) implements kmsg_dumper by
themselves, that should be easier to use multiple records for one
message dumping request.

Best Regards,
Huang Ying