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Date: Thu, 25 Apr 2024 16:54:54 -0400
From: Kent Overstreet <kent.overstreet@linux.dev>
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: colyli@suse.de, msakai@redhat.com, peterz@infradead.org, 
	mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, akpm@linux-foundation.org, 
	bfoster@redhat.com, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, 
	jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, 
	jserv@ccns.ncku.edu.tw, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, 
	dm-devel@lists.linux.dev, linux-bcachefs@vger.kernel.org, linux-perf-users@vger.kernel.org, 
	Kuan-Wei Chiu <visitorckw@gmail.com>
Subject: Re: [PATCH v4 00/16] treewide: Refactor heap related implementation
Message-ID: <txga7kntgxylhmxqkzs3rdgmnjai2ftlstdezltkapdctn3ju6@ndyytejfyoc2>
References: <20240425141826.840077-1-visitorckw@gmail.com>
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In-Reply-To: <20240425141826.840077-1-visitorckw@gmail.com>

Hey Stephen, I think this is ready for -next.

https://github.com/visitorckw/linux.git refactor-heap-v4

Kuan, please add my acked-by to the bcachefs patch as well.

Cheers,
Kent

On Thu, Apr 25, 2024 at 10:18:10PM +0800, Kuan-Wei Chiu wrote:
> This patch series focuses on several adjustments related to heap
> implementation. Firstly, a type-safe interface has been added to the
> min_heap, along with the introduction of several new functions to
> enhance its functionality. Additionally, the heap implementation for
> bcache and bcachefs has been replaced with the generic min_heap
> implementation from include/linux. Furthermore, several typos have been
> corrected.
> 
> Previous discussion with Kent Overstreet:
> https://lkml.kernel.org/ioyfizrzq7w7mjrqcadtzsfgpuntowtjdw5pgn4qhvsdp4mqqg@nrlek5vmisbu
> 
> Regards,
> Kuan-Wei
> 
> ---
> 
> You can preview this patch series on the 'refactor-heap-v4' branch of
> the repository at the following link:
> 
> https://github.com/visitorckw/linux.git
> 
> Changes in v4:
> - Change struct initializations to use designated initializers.
> - Replace memcpy() with func->swp() in heap_del() due to issues with
>   set_backpointer in bcachefs when setting idx.
> - Fix an error in ec_stripes_heap_swap() where
>   ec_stripes_heap_set_backpointer() should be called after swapping.
> 
> Changes in v3:
> - Avoid heap->heap.nr to eliminate the nested types.
> - Add MIN_HEAP_PREALLOCATED macro for preallocating some elements.
> - Use min_heap_sift_up() in min_heap_push().
> - Fix a bug in heap_del() where we should copy the last element to
>   'data + idx * element_size' instead of 'data'.
> - Add testcases for heap_del().
> - Fix bugs in bcache/bcachefs patches where the parameter types in
>   some compare functions should have been 'type **', but were
>   mistakenly written as 'type *'.
> 
> Changes in v2:
> - Add attribute __always_unused to the compare and swap functions
>   that do not use the args parameter.
> - Rename min_heapify() to min_heap_sift_down().
> - Update lib/test_min_heap.c to use min_heap_init().
> - Refine the commit message for bcache and bcachefs.
> - Adjust the order of patches in the patch series.
> 
> Link to v3: https://lore.kernel.org/20240406164727.577914-1-visitorckw@gmail.com
> Link to v2: https://lore.kernel.org/20240320145417.336208-1-visitorckw@gmail.com
> Link to v1: https://lkml.kernel.org/20240319180005.246930-1-visitorckw@gmail.com
> 
> Kuan-Wei Chiu (16):
>   perf/core: Fix several typos
>   bcache: Fix typo
>   bcachefs: Fix typo
>   lib min_heap: Add type safe interface
>   lib min_heap: Add min_heap_init()
>   lib min_heap: Add min_heap_peek()
>   lib min_heap: Add min_heap_full()
>   lib min_heap: Add args for min_heap_callbacks
>   lib min_heap: Add min_heap_sift_up()
>   lib min_heap: Add min_heap_del()
>   lib min_heap: Update min_heap_push() and min_heap_pop() to return bool
>     values
>   lib min_heap: Rename min_heapify() to min_heap_sift_down()
>   lib min_heap: Update min_heap_push() to use min_heap_sift_up()
>   lib/test_min_heap: Add test for heap_del()
>   bcache: Remove heap-related macros and switch to generic min_heap
>   bcachefs: Remove heap-related macros and switch to generic min_heap
> 
>  drivers/md/bcache/alloc.c      |  64 ++++++++---
>  drivers/md/bcache/bcache.h     |   2 +-
>  drivers/md/bcache/bset.c       |  84 ++++++++++-----
>  drivers/md/bcache/bset.h       |  14 +--
>  drivers/md/bcache/btree.c      |  17 ++-
>  drivers/md/bcache/extents.c    |  53 ++++++----
>  drivers/md/bcache/movinggc.c   |  41 +++++--
>  drivers/md/bcache/sysfs.c      |   2 +
>  drivers/md/bcache/util.c       |   2 +-
>  drivers/md/bcache/util.h       |  67 +-----------
>  drivers/md/bcache/writeback.c  |   3 +
>  drivers/md/dm-vdo/repair.c     |  19 ++--
>  drivers/md/dm-vdo/slab-depot.c |  14 +--
>  fs/bcachefs/clock.c            |  43 ++++++--
>  fs/bcachefs/clock_types.h      |   2 +-
>  fs/bcachefs/ec.c               |  76 ++++++++-----
>  fs/bcachefs/ec_types.h         |   2 +-
>  fs/bcachefs/util.c             |   2 +-
>  fs/bcachefs/util.h             | 118 +--------------------
>  include/linux/min_heap.h       | 188 +++++++++++++++++++++++++--------
>  kernel/events/core.c           |  29 ++---
>  lib/test_min_heap.c            |  75 +++++++++----
>  22 files changed, 522 insertions(+), 395 deletions(-)
> 
> -- 
> 2.34.1
>