Re: [PATCH RFC 00/14] Remove PG_private by using page/folio->private checks instead
Jürgen Groß <[email protected]>
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On 01.08.26 04:13, Zi Yan wrote: > Hi all, > > This patchset removes PG_private to make space for upcoming PG_folio > (reserved as __PG_folio) for identifying pages from a folio (more details > in Note below). Instead of checking PG_private, all code is changed to > check page/folio->private != NULL instead. I'm a little bit worried that page/folio->private is in a union, so today it could (in theory) be != NULL while PG_private isn't set. Is it really not possible to enter a path where PG_private is tested while page/folio->private != NULL due to the union being used otherwise (PG_private not set)? Juergen
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