linux-kernel - Re: [PATCH] eventfs: Have inodes have unique inode numbers

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Message-ID: <1df2a2f8-f51d-4e02-9126-3e8245750466@efficios.com>
Date: Fri, 26 Jan 2024 17:40:24 -0500
From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To: Matthew Wilcox <willy@...radead.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
 Steven Rostedt <rostedt@...dmis.org>, LKML <linux-kernel@...r.kernel.org>,
 Linux Trace Devel <linux-trace-devel@...r.kernel.org>,
 Masami Hiramatsu <mhiramat@...nel.org>,
 Christian Brauner <brauner@...nel.org>, Ajay Kaher
 <ajay.kaher@...adcom.com>, Geert Uytterhoeven <geert@...ux-m68k.org>,
 linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH] eventfs: Have inodes have unique inode numbers

On 2024-01-26 17:34, Matthew Wilcox wrote:
> On Fri, Jan 26, 2024 at 05:14:12PM -0500, Mathieu Desnoyers wrote:
>> I would suggest this straightforward solution to this:
>>
>> a) define a EVENTFS_MAX_INODES (e.g. 4096 * 8),
>>
>> b) keep track of inode allocation in a bitmap (within a single page),
>>
>> c) disallow allocating more than "EVENTFS_MAX_INODES" in eventfs.
> 
> ... reinventing the IDA?

Looking at include/linux/idr.h now that you mention it, yes,
you are absolutely right!

Thanks,

Mathieu

-- 
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com