linux-kernel - Re: [PATCH] hfsplus: Convert kmap() to kmap_local

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Message-ID: <YuBQqe345DR2hBsa@casper.infradead.org>
Date:   Tue, 26 Jul 2022 21:38:01 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Ira Weiny <ira.weiny@...el.com>
Cc:     Viacheslav Dubeyko <slava@...eyko.com>,
        "Fabio M. De Francesco" <fmdefrancesco@...il.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hfsplus: Convert kmap() to kmap_local_page() in bitmap.c

On Tue, Jul 26, 2022 at 12:11:50PM -0700, Ira Weiny wrote:
> On Mon, Jul 25, 2022 at 06:54:50PM +0100, Matthew Wilcox wrote:
> > On Mon, Jul 25, 2022 at 10:17:13AM -0700, Viacheslav Dubeyko wrote:
> > > Looks good. Maybe, it makes sense to combine all kmap() related modifications in HFS+ into
> > > one patchset?
> > 
> > For bisection, I'd think it best to leave them separate?
> 
> I'm not quite sure I understand why putting the individual patches into a
> series makes bisection easier?  It does make sense to keep individual patches.

If somebody reports a bug, bisection will tell you which of these
kmap-conversion patches is at fault, reducing the amount of brainpower
you have to invest in determining where the bug is.