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From:   Marcos Paulo de Souza <mpdesouza@suse.com>
To:     linux-kernel@vger.kernel.org, live-patching@vger.kernel.org
Cc:     jpoimboe@redhat.com, joe.lawrence@redhat.com, pmladek@suse.com,
        Marcos Paulo de Souza <mpdesouza@suse.com>
Subject: [PATCH v2 0/4] livepatch: Add garbage collection for shadow variables
Date:   Wed, 26 Oct 2022 16:41:18 -0300
Message-Id: <20221026194122.11761-1-mpdesouza@suse.com>
MIME-Version: 1.0
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Hello,

This is the v2 of the livepatch shadow GC patches. The changes are minor since
nobody asked for for big code changes.

Changes from v1:
* Reworked commit messages (Petr)
* Added my SoB which was missing in some patches, or the ordering was wrong. (Josh)
* Change __klp_shadow_get_or_use to __klp_shadow_get_or_add_locked and add a comment (Petr)
* Add lockdep_assert_held on __klp_shadow_get_or_add_locked (Petr)
  about it's meaning (Petr)
* CCing LKML (Josh)

Some observations:
* Petr has reviewed some of the patches that we created. I kept the Reviewed-by
  tags since he wrote the patches some time ago and now he reviewed them again
  on the ML.
* There were questions about possible problems about using klp_shadow_types
  instead of using ids, but Petr already explained that internally it still uses
  the id to find the correct livepatch.
* Regarding the possibility of multiple patches use the same ID, the problem
  already existed before. Petr suggested using a "stringified" version using
  name and id, but nobody has commented yet. I can implement such feature in a
  v3 if necessary.

Marcos Paulo de Souza (2):
  livepatch/shadow: Introduce klp_shadow_type structure
  livepatch/shadow: Add garbage collection of shadow variables

Petr Mladek (2):
  livepatch/shadow: Separate code to get or use pre-allocated shadow
    variable
  livepatch/shadow: Separate code removing all shadow variables for a
    given id

 include/linux/livepatch.h                     |  50 ++-
 kernel/livepatch/core.c                       |  39 +++
 kernel/livepatch/core.h                       |   1 +
 kernel/livepatch/shadow.c                     | 297 +++++++++++++-----
 kernel/livepatch/transition.c                 |   4 +-
 lib/livepatch/test_klp_shadow_vars.c          | 119 ++++---
 samples/livepatch/livepatch-shadow-fix1.c     |  24 +-
 samples/livepatch/livepatch-shadow-fix2.c     |  34 +-
 .../selftests/livepatch/test-shadow-vars.sh   |   2 +-
 9 files changed, 417 insertions(+), 153 deletions(-)

-- 
2.37.3