linux-kernel - Re: [RFC PATCH 1/4] mm: migrate: Allow misplaced migration without VMA too

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Message-ID: <Z8nfPlJu8kxUvB8m@casper.infradead.org>
Date: Thu, 6 Mar 2025 17:45:34 +0000
From: Matthew Wilcox <willy@...radead.org>
To: Gregory Price <gourry@...rry.net>
Cc: Bharata B Rao <bharata@....com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, AneeshKumar.KizhakeVeetil@....com,
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Subject: Re: [RFC PATCH 1/4] mm: migrate: Allow misplaced migration without
 VMA too

On Thu, Mar 06, 2025 at 12:24:16PM -0500, Gregory Price wrote:
> On Thu, Mar 06, 2025 at 11:15:29AM +0530, Bharata B Rao wrote:
> > migrate_misplaced_folio_prepare() can be called from a
> > context where VMA isn't available. Allow the migration
> > to work from such contexts too.
> > 
> > Signed-off-by: Bharata B Rao <bharata@....com>
> 
> I have a similar patch in the unmapped pagecache RFC
> 
> we may also need this:
> https://lore.kernel.org/linux-mm/20250107000346.1338481-4-gourry@gourry.net/
> 
> May be worth just pulling these ahead to avoid conflict.

Or not putting them in at all because this whole thing is a magnificent
waste of time?