linux-kernel - Re: [PATCH v4 00/16] treewide: Refactor heap related implementation

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Message-ID: <Zirx4fCA8C6/hz8m@visitorckw-System-Product-Name>
Date: Fri, 26 Apr 2024 08:14:25 +0800
From: Kuan-Wei Chiu <visitorckw@...il.com>
To: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>, colyli@...e.de,
	msakai@...hat.com, peterz@...radead.org, mingo@...hat.com,
	acme@...nel.org, namhyung@...nel.org, akpm@...ux-foundation.org,
	bfoster@...hat.com, mark.rutland@....com,
	alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
	irogers@...gle.com, adrian.hunter@...el.com, jserv@...s.ncku.edu.tw,
	linux-bcache@...r.kernel.org, linux-kernel@...r.kernel.org,
	dm-devel@...ts.linux.dev, linux-bcachefs@...r.kernel.org,
	linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v4 00/16] treewide: Refactor heap related implementation

On Thu, Apr 25, 2024 at 04:54:54PM -0400, Kent Overstreet wrote:
> 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.
> 
Acked-by tag has been added to the repository mentioned above and
pushed out.

Regards,
Kuan-Wei
> 
> 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
> >