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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20260701182102.1586784-1-hannes@cmpxchg.org> From: "Vlastimil Babka (SUSE)" Autocrypt: addr=vbabka@kernel.org; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSNWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBrZXJuZWwub3JnPsLBsAQTAQoAWhYhBKlA1DSZLC6OmRA9UCJPp+fM gqZkBQJqFFy6GxSAAAAAAAQADm1hbnUyLDIuNSsxLjEyLDIsMgIbAwUJGtCBUAULCQgHAwUV CgkICwUWAgMBAAIeBQIXgAAKCRAiT6fnzIKmZJIUEADFx/tREzUImHrEwVHeSvDFmA7tJysI UVrlvrM09E7GIuzphzv7jYmo8n3ANpCczLEVr4G0syYQdTigaZgv3+FQDIIzhKih1IHhu1Ei XHlywNWKnQxxQEUNi5Mwx43wQz5XVw9F1A7gtKBKNtfogO511hAbrzagrYajyQacEJ/+sfhZ 9Da8ltHIXD8pcYaHUfQgEusCgmEd9+KrUwrTbckFKmYq5chuE6yJ4J0EmWknL096jIE6CnzF FRslQ3B1UKDjxVsm1ZHfir5NeWszLkTvGFsddFaWTgh8UycESG6VQzKXjjewXu2pG7YQYRpj QKm1W5X2TkwWkXRBZTmfmbhxIUMh3+zf5wQ463rSmDN/8v81tdqBtAW6rH/kzg1GvkaTHXn0 507yEHFzBksk2viAuIxxr7km8+/KARYLIdGtx30EG8cKzAUZOK6WqxtNCsXUJNrVE8CWrCaD icoNu7Fs1c5hmPHdSTnU48ce67449DdnO4neLSNhRiGlMHJgfJUmgrxu/hcYeOZ3haWmEQ2w uW1Mh01OHi8QZHCEyAbABrPs9GUgccc/4eYXX9hIgxfSkYzn8f+8NuIFPWl/0uTvjgqU29FQ SbzOLxHq9439Ox40G5mS5eZXRGxITYR+6TXvRGI6P/264jvflnr/pDGUttaikU+0W+1uxgKH cmYbEc7ATQRbGTU1AQgAn0H6UrFiWcovkh6EXVcl+SeqyO6JHOPm+e9Wu0Vw+VIUvXZVUVVQ La1PQDUi6j00ChlcR66g9/V0sPIcSutacPKfdKYOBvzd4rlhL8rfrdEsQw5ApZxrA8kYZVMh FmBRKAa6wos25moTlMKpCWzTH84+WO5+ziCTsTUZASAToz3RdunTD+vQcHj0GqNTPAHK63sf bAB2I0BslZkXkY1RLb/YhuA6E7JyEd2pilZOrIuBGl/5q2qSakgnAVFWFBR/DO27JuAksYnq +aH8vI0xGvwn75KqSk4UzAkDzWSmO4ZHuahKtQgZNsMYV+PGayRBX9b9zbldzopoLBdqHc4n jQARAQABwsF8BBgBCgAmAhsMFiEEqUDUNJksLo6ZED1QIk+n58yCpmQFAmfIHFQFCRYU6J8A CgkQIk+n58yCpmS2PA//bqN1LfcotmArgElsa+0EGZSQlYgK48pm8WAeTXTngudP9IJ4SuKY HR5RNjHcBeqN+Me0zxRqYzRb8nGanHEkDyf4Im8DQM8d6vbyU+FcPmG4skud4kgS1zMHnlVd SXfSIwKC/hKgdHG8aBV7545Lz9X6Iohea+94wneD0aw/hqF+QWewGZhWJriWAZtvEkzNjQOi 4U9F/trLten/x7bpphDSnDMKJtITbtzATT1Dq7o7VpIUK1nCTQALMuMjKCdi8OdU/+V+R3O4 0PXWvX8qrvqYapVbZ+9KqT74FsuB0Ya9uXwgBF2Q6cRuETZk5vqaqKxzqoQZCO8AOz/58j6O 2RHNy/mZEN+7tJ5Tsq42zVJ4jxsT8b9YplavCMsnBgDeRWhcbYhCyttoL7nYISyWg4kQYZ/P wIV3OuNv2f8iKYsxNsRuClOAF82+gvqOy1/1pprFjy8uo2pkoOrb63aOP3vO5VHnRKgra6dq NcaZ+c6J4H+nEJGi2SkHAUJz5oBzuThvPudLvPA/SK8sKoM01IRxSihev/S/5WLazXB1PGem OCbvzC1IjWJJraxiDJ5IygokapUa2RP7+WBR22skQ3SSl6G107QgWKSyTOGWEaRmV53vxQLV jXuCmzSSasTL60zq5yGrT4/DYQVSNEUiUbG4pYekxJujNeEDkUlky0Y= In-Reply-To: <20260701182102.1586784-1-hannes@cmpxchg.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Stat-Signature: misknr3jh3x1mdun6hipw4iz75bwadig X-Rspamd-Queue-Id: BAA6E4000E X-Rspamd-Server: rspam06 X-HE-Tag: 1782930453-294877 X-HE-Meta: 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 CD1Iv0/M XDtzhNEg5F/ByQpUQWkoW2hiAb+HT+pVl0fu7MgKMn6e9OLRnu5vXqc8lcqarsppPLSmXnO9yTyinPkf+g6yGwtVlK8D7iUZSmg9OQr/fhnqsCEMRT4ltXN5Y7518+i6z0Mrwmuj6+6bjHFOKfwTdeIRoT2rMBxZwPjLjowzF1ouiguPwvxSJBsm//FQSFoXRPpt0vAkSWyEl3BNaMgv0KwK/Z/xwnV093kTBgMew+ZRZjfeOQVPiB2S4UPpern3eU3qvIjwfYVMZ0KQURaygE+13QAOfRKRujOJlQxT16NDZDWOgJN3lkAl33UzkaV2+JtzwDgsDGN3VyHO40eE3bGQFLsrPVcr1jAFc4a4zNfMKZQQD/+8EW+3FL9fsAOo0xjXUXlYddaU4UrWIpxDteKJ4ba9xNLri0uCOd/SXkZwUD2dD4QXsIj6zwLHxpnH4cr4x Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 7/1/26 20:21, Johannes Weiner wrote: > Gregory points out that these descriptions are cursed and confusing, > considering what these flags actually do. This is mostly due to > historic implementation choices and cgroup1 baggage. Improve the > description of their actual effects. > > Reported-by: Gregory Price > Signed-off-by: Johannes Weiner Reviewed-by: Vlastimil Babka (SUSE) > --- > include/linux/gfp_types.h | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/include/linux/gfp_types.h b/include/linux/gfp_types.h > index 54ca0c88bab6..463b551d12d9 100644 > --- a/include/linux/gfp_types.h > +++ b/include/linux/gfp_types.h > @@ -136,7 +136,8 @@ enum { > * %__GFP_THISNODE forces the allocation to be satisfied from the requested > * node with no fallbacks or placement policy enforcements. > * > - * %__GFP_ACCOUNT causes the allocation to be accounted to kmemcg. > + * %__GFP_ACCOUNT causes the allocation to be accounted to the active > + * cgroup context. > * > * %__GFP_NO_OBJ_EXT causes slab allocation to have no object extension. > * mark_obj_codetag_empty() should be called upon freeing for objects allocated > @@ -320,7 +321,7 @@ enum { > * %ZONE_NORMAL or a lower zone for direct access but can direct reclaim. > * > * %GFP_KERNEL_ACCOUNT is the same as GFP_KERNEL, except the allocation is > - * accounted to kmemcg. > + * accounted to the active cgroup context. > * > * %GFP_NOWAIT is for kernel allocations that should not stall for direct > * reclaim, start physical IO or use any filesystem callback. It is very