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    Subject[PATCH v2 0/6] Merge ramoops and persistent_ram, generic pstore RAM backend
    Hi all,

    Here is v2 of the previous patch set. The series do not include
    patches that were already merged.

    I believe I addressed all the previous comments, plus now the
    series include another small cleanup patch.

    Here's some background for the series:

    There are currently two competing debug facilities to store kernel
    messages in a persistent storage: a generic pstore and Google's
    persistent_ram. Not so long ago (https://lkml.org/lkml/2012/3/8/252),
    it was decided that we should fix this situation.

    Recently ramoops has switched to pstore, which basically means that
    it became a RAM backend for the pstore framework.

    persistent_ram+ram_console and ramoops+pstore have almost the same
    features, except:

    1. Ramoops doesn't support ECC. Having ECC is useful when a hardware
    reset was used to bring the machine back to life (i.e. a watchdog
    triggered). In such cases, RAM may be somewhat corrupt, but
    usually it is restorable.

    2. Pstore doesn't support logging kernel messages in run-time, it only
    dumps dmesg when kernel oopses/panics. This makes pstore useless for
    debugging hangs caused by HW issues or improper use of HW (e.g.
    weird device inserted -> driver tried to write a reserved bits ->
    SoC hanged. In that case we don't get any messages in the pstore.

    These patches solve the first issue, plus move things to their
    proper places. Patches that will fix the second issue will be sent
    shortly.

    ---
    Documentation/ramoops.txt | 8 +-
    drivers/char/Kconfig | 9 -
    drivers/char/Makefile | 1 -
    drivers/char/ramoops.c | 362 --------------------
    drivers/staging/android/Kconfig | 10 +-
    drivers/staging/android/Makefile | 1 -
    drivers/staging/android/persistent_ram.c | 530 -----------------------------
    drivers/staging/android/persistent_ram.h | 84 -----
    drivers/staging/android/ram_console.c | 2 +-
    fs/pstore/Kconfig | 17 +
    fs/pstore/Makefile | 3 +
    fs/pstore/ram.c | 383 +++++++++++++++++++++
    fs/pstore/ram_core.c | 532 ++++++++++++++++++++++++++++++
    include/linux/pstore_ram.h | 98 ++++++
    include/linux/ramoops.h | 17 -
    15 files changed, 1042 insertions(+), 1015 deletions(-)

    --
    Anton Vorontsov
    Email: cbouatmailru@gmail.com


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