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 lQLEQL4N dUKzx7kpPKVC/xR3WIph07GSe/Re8TfWLssNtqTG47JGUMNuw+2YbrFbS+sRq3jSIh1PSSdrlbk27PTyeGN7CjQCUyJ7IvcE66pUSYkdsiVxki4Tf7W95w7YsucALdFwexO0LkNWyuIuv3Rkoh0Da5gcpPm7dHqjQoUpbPgbs2AAZ2N4jf2DYLW4qMgp2VwBvgIbv4UpaZMaIdzrtZ9Wtt48ThHIeoiMPL5zhZMYtgTB553M227541CJwghO8BGLPGRJCFNZLRlFl0NLWf3d5w6prPzM39y2AxI0qNgzwRhy7o24a6m3G8O7uDRrZ0TKh77Od/apbC8NeyU7QjK5d5UQJ9lWnoUD/mDeC5hyZDa6MgnwCp897/ivZe9I06FB9XFAuViOOLX6l7/J1/+78NGOTZ3x3PbW1sm0ijHJygHWPNleb6poyj21GDB3oc3Ku1t+3MW1FWQxqvN6Ja+eWaEwY7g== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu Aug 20, 2026 at 2:55 PM EDT, Kairui Song via B4 Relay wrote: > From: Kairui Song > > Lift the restriction that kept swap cache folios without a mapping > from being split. All the underlying infrastructure is sound against > that with a few more tweaks, no reason to block it anymore. > > Also rename the split helper, which now handles mappingless swap > cache folios that are yet to be anon, or may actually belong to > shmem. In either case there is not much difference in how they would > be split. > > A non-anon swap cache folio that still has a mapping (e.g. a shmem > swap cache folio) remains rejected up front: it would need both its > page cache and swap cache entries updated on split, which the split > helpers do not do, and there would be little benefit in doing so. > > Signed-off-by: Kairui Song > --- > mm/huge_memory.c | 38 ++++++++++++++++++++++---------------- > 1 file changed, 22 insertions(+), 16 deletions(-) > LGTM. Reviewed-by: Zi Yan --=20 Best Regards, Yan, Zi