lkml.org 
[lkml]   [2021]   [Apr]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v8 4/4] fs: unicode: Add utf8 module and a unicode layer
From
Date

On 27/04/21 11:59 am, Christoph Hellwig wrote:
> On Sat, Apr 24, 2021 at 02:21:36AM +0530, Shreeya Patel wrote:
>> utf8data.h_shipped has a large database table which is an auto-generated
>> decodification trie for the unicode normalization functions.
>> We can avoid carrying this large table in the kernel unless it is required
>> by the filesystem during boot process.
>>
>> Hence, make UTF-8 encoding loadable by converting it into a module and
>> also add built-in UTF-8 support option for compiling it into the
>> kernel whenever required by the filesystem.
> The way this is implemement looks rather awkward.
>
> Given that the large memory usage is for a data table and not for code,
> why not treat is as a firmware blob and load it using request_firmware?


utf8 module not just has the data table but also has some kernel code.
The big part that we are trying to keep out of the kernel is a tree
structure that gets traversed based on a key that is the file name.
This is done when issuing a lookup in the filesystem, which has to be
very fast. So maybe it would not be so good to use request_firmware for
such a core feature.

\
 
 \ /
  Last update: 2021-04-27 12:10    [W:0.055 / U:1.872 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site