Subject: Re: [RFC PATCH v2 04/11] pstore: Add compression support to pstore

From: Aruna Balakrishnaiah <[email-masked]>
Date: Tue, 27 Aug 2013 10:49:48 +0530

On Friday 23 August 2013 04:47 AM, Luck, Tony wrote:
> <1>[  383.209057] RIP  [<ffffffff813d3946>] sysrq_handle_crash+0x16/0x20
> <4>[  383.209057]  RSP <ffff88006f551e80>
> <4>[  383.209057] CR2: 0000000000000000
> <4>[  383.209057] ---[ end trace 04a1cddad37b4b33 ]---
> <3>[  383.209057] pstore: compression failed for Part 2 returned -5
> <3>[  383.209057] pstore: Capture uncompressed oops/panic report of Part 2
> <3>[  383.209057] pstore: compression failed for Part 5 returned -5
>
> Interesting.  With ERST backend I didn't see these messages.  Traces in
> pstore recovered files go as far as the line before the "---[ end trace 04a1cddad37b4b33 ]---"
>
> Why the difference depending on which back end is in use?
>
> But I agree that we shouldn't have these messages.  They use up space
> in the persistent store that could be better used saving some more lines
> from earlier in the console log.

Yeah. We can remove these messages as it will add to the space consumed. But it 
would
be good to know why the compression failed with efivars case.

Seiji,

Could you let us know the efivars buffer size with which the pstore is 
registered when
the failure occurred.

Regards,
Aruna

>
> -Tony
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