linux-kernel - Re: [PATCH v8 RESEND] staging: unisys: visorhba: Convert module from IDR to XArray

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Message-ID: <3316425.tqDOt8T8LQ@linux.local>
Date:   Wed, 16 Jun 2021 18:56:39 +0200
From:   "Fabio M. De Francesco" <fmdefrancesco@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     David Kershner <david.kershner@...sys.com>,
        sparmaintainer@...sys.com, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Matthew Wilcox <willy@...radead.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH v8 RESEND] staging: unisys: visorhba: Convert module from IDR to XArray

On Tuesday, June 15, 2021 1:50:15 PM CEST Greg Kroah-Hartman wrote:
> On Fri, May 14, 2021 at 10:11:11AM +0200, Fabio M. De Francesco wrote:
> > Converted visorhba from IDR to XArray. The abstract data type XArray is
> > more memory-efficient, parallelizable, and cache friendly. It takes
> > advantage of RCU to perform lookups without locking. Furthermore, IDR is
> > deprecated because XArray has a better (cleaner and more consistent)
> > API.
> > 
> > Signed-off-by: Fabio M. De Francesco <fmdefrancesco@...il.com>
> > Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>
> > ---
> 
> Given a lack of response from the unisys maintainer, I'll go apply this
> now and see what breaks :)
>
Hi Greg,

I'm really grateful to you for having applied that patch notwithstanding the 
lack of response from Unisys. Understanding IDR, XArray, and the flow of the 
code, has been a hard task for a newcomer having only a month of experience to 
kernel development.

Thanks very much,

Fabio
> 
> thanks,
> 
> greg k-h