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Message-ID: <61820F51-AB93-45D1-812C-D6EAA089AE3E@oracle.com>
Date: Tue, 13 Feb 2024 21:40:35 +0000
From: Chuck Lever III <chuck.lever@...cle.com>
To: Al Viro <viro@...iv.linux.org.uk>, Christian Brauner <brauner@...nel.org>,
Jan Kara <jack@...e.cz>, Hugh Dickins <hughd@...gle.com>,
Andrew Morton
<akpm@...ux-foundation.org>,
Liam Howlett <liam.howlett@...cle.com>,
kernel
test robot <oliver.sang@...el.com>,
Feng Tang <feng.tang@...el.com>
CC: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
linux-fsdevel
<linux-fsdevel@...r.kernel.org>,
"maple-tree@...ts.infradead.org"
<maple-tree@...ts.infradead.org>,
linux-mm <linux-mm@...ck.org>, kernel test
robot <lkp@...el.com>
Subject: Re: [PATCH RFC 0/7] Use Maple Trees for simple_offset utilities
> On Feb 13, 2024, at 4:37 PM, Chuck Lever <cel@...nel.org> wrote:
>
> In an effort to address slab fragmentation issues reported a few
> months ago, I've replaced the use of xarrays for the directory
> offset map in "simple" file systems (including tmpfs).
>
> This patch set passes functional testing and is ready for code
> review. But I don't have the facilities to re-run the performance
> tests that identified the regression. We expect the performance of
> this implementation will need additional improvement.
>
> Thanks to Liam Howlett for helping me get this working.
And note the patches are also available from:
https://git.kernel.org/pub/scm/linux/kernel/git/cel/linux.git
in the simple-offset-maple branch.
> ---
>
> Chuck Lever (6):
> libfs: Rename "so_ctx"
> libfs: Define a minimum directory offset
> libfs: Add simple_offset_empty()
> maple_tree: Add mtree_alloc_cyclic()
> libfs: Convert simple directory offsets to use a Maple Tree
> libfs: Re-arrange locking in offset_iterate_dir()
>
> Liam R. Howlett (1):
> test_maple_tree: testing the cyclic allocation
>
>
> fs/libfs.c | 125 +++++++++++++++++++++++--------------
> include/linux/fs.h | 6 +-
> include/linux/maple_tree.h | 7 +++
> lib/maple_tree.c | 93 +++++++++++++++++++++++++++
> lib/test_maple_tree.c | 44 +++++++++++++
> mm/shmem.c | 4 +-
> 6 files changed, 227 insertions(+), 52 deletions(-)
>
> --
> Chuck Lever
>
>
--
Chuck Lever
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