linux-kernel - [PATCH 0/3] fat: add a cache for msdos_format

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Date:   Sun, 29 Aug 2021 14:25:14 +0000
From:   "Caleb D.S. Brzezinski" <calebdsb@...tonmail.com>
To:     hirofumi@...l.parknet.co.jp
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        "Caleb D.S. Brzezinski" <calebdsb@...tonmail.com>
Subject: [PATCH 0/3] fat: add a cache for msdos_format_name()

Hi all,

This patch series adds a cache for the formatted names created by
msdos_format_name(). In my testing, it resulted in approximately a 0.2 ms
decrease in kernel time for listing a small directory.

The overhead is in memory, but each entry is only 25 bytes plus
sizeof(struct hlist_node), and the cache also actively collects
infrequently used nodes, keeping overall memory usage low.

Caleb D.S. Brzezinski (3):
  fat: define functions and data structures for a formatted name cache
  fat: add the msdos_format_name() filename cache
  fat: add hash machinery to relevant filesystem operations

 fs/fat/namei_msdos.c | 140 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)

base-commit: 85a90500f9a1717c4e142ce92e6c1cb1a339ec78
-- 
2.32.0