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Content-Language: en-US To: Alexei Starovoitov , bpf@vger.kernel.org Cc: andrii@kernel.org, memxor@gmail.com, akpm@linux-foundation.org, peterz@infradead.org, bigeasy@linutronix.de, rostedt@goodmis.org, houtao1@huawei.com, hannes@cmpxchg.org, shakeel.butt@linux.dev, mhocko@suse.com, willy@infradead.org, tglx@linutronix.de, jannh@google.com, tj@kernel.org, linux-mm@kvack.org, kernel-team@fb.com References: <20250115021746.34691-1-alexei.starovoitov@gmail.com> <20250115021746.34691-8-alexei.starovoitov@gmail.com> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; 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 BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJkBREIBQkRadznAAoJECJPp+fMgqZkNxIQ ALZRqwdUGzqL2aeSavbum/VF/+td+nZfuH0xeWiO2w8mG0+nPd5j9ujYeHcUP1edE7uQrjOC Gs9sm8+W1xYnbClMJTsXiAV88D2btFUdU1mCXURAL9wWZ8Jsmz5ZH2V6AUszvNezsS/VIT87 AmTtj31TLDGwdxaZTSYLwAOOOtyqafOEq+gJB30RxTRE3h3G1zpO7OM9K6ysLdAlwAGYWgJJ V4JqGsQ/lyEtxxFpUCjb5Pztp7cQxhlkil0oBYHkudiG8j1U3DG8iC6rnB4yJaLphKx57NuQ PIY0Bccg+r9gIQ4XeSK2PQhdXdy3UWBr913ZQ9AI2usid3s5vabo4iBvpJNFLgUmxFnr73SJ KsRh/2OBsg1XXF/wRQGBO9vRuJUAbnaIVcmGOUogdBVS9Sun/Sy4GNA++KtFZK95U7J417/J Hub2xV6Ehc7UGW6fIvIQmzJ3zaTEfuriU1P8ayfddrAgZb25JnOW7L1zdYL8rXiezOyYZ8Fm ZyXjzWdO0RpxcUEp6GsJr11Bc4F3aae9OZtwtLL/jxc7y6pUugB00PodgnQ6CMcfR/HjXlae h2VS3zl9+tQWHu6s1R58t5BuMS2FNA58wU/IazImc/ZQA+slDBfhRDGYlExjg19UXWe/gMcl De3P1kxYPgZdGE2eZpRLIbt+rYnqQKy8UxlszsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZAUSmwUJDK5EZgAKCRAiT6fnzIKmZOJGEACOKABgo9wJXsbWhGWYO7mD 8R8mUyJHqbvaz+yTLnvRwfe/VwafFfDMx5GYVYzMY9TWpA8psFTKTUIIQmx2scYsRBUwm5VI EurRWKqENcDRjyo+ol59j0FViYysjQQeobXBDDE31t5SBg++veI6tXfpco/UiKEsDswL1WAr tEAZaruo7254TyH+gydURl2wJuzo/aZ7Y7PpqaODbYv727Dvm5eX64HCyyAH0s6sOCyGF5/p eIhrOn24oBf67KtdAN3H9JoFNUVTYJc1VJU3R1JtVdgwEdr+NEciEfYl0O19VpLE/PZxP4wX PWnhf5WjdoNI1Xec+RcJ5p/pSel0jnvBX8L2cmniYnmI883NhtGZsEWj++wyKiS4NranDFlA HdDM3b4lUth1pTtABKQ1YuTvehj7EfoWD3bv9kuGZGPrAeFNiHPdOT7DaXKeHpW9homgtBxj 8aX/UkSvEGJKUEbFL9cVa5tzyialGkSiZJNkWgeHe+jEcfRT6pJZOJidSCdzvJpbdJmm+eED w9XOLH1IIWh7RURU7G1iOfEfmImFeC3cbbS73LQEFGe1urxvIH5K/7vX+FkNcr9ujwWuPE9b 1C2o4i/yZPLXIVy387EjA6GZMqvQUFuSTs/GeBcv0NjIQi8867H3uLjz+mQy63fAitsDwLmR EP+ylKVEKb0Q2A== In-Reply-To: <20250115021746.34691-8-alexei.starovoitov@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 2E7CA4001E X-Stat-Signature: mxs8d598ouuagitw96ge94cn3jkc3twa X-Rspam-User: X-HE-Tag: 1736964181-467503 X-HE-Meta: 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 7cJT9RPF 1y4JBbrDFep3y8XDi857u+OQdobKQDjt1UzP/MZ9Twfi2gSJbzQtmqCc6wh2gSkvi5tUPS3b36IeqtUVMC+kOYmWYMoMBjsyeyCF56oAWalCU1F1RRJTv5T9pScv86pzNkn/k2TRl1D06YlXDUokFtKMdN+T4CbO6dMk2DviCuYnFwmigY1wXucbgLTyE5afqs6kPNFV+Y8nKq8MB/XkE72hNhzGgkJCMl5sLXxtzoqTjCTU8botrPWcbP84iPGJj0Y2bIogNnVR8A7ccqpKKdqs9nQ1hRUtudhKkJI0aPI7L/mSAGWEb2itpzE+Ihbfo7ubfFnAWWlWUPHBe3H05msWrVtjV3ipkPaHP0WW/n6Cg2S8Qb63SXb7CUnlP2+5jMIoPY4BflUVTLRRZzc2ObaYHiUwt8Ln1fvo20jHJySzxazA= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 1/15/25 03:17, Alexei Starovoitov wrote: > From: Alexei Starovoitov > > Use try_alloc_pages() and free_pages_nolock() > > Signed-off-by: Alexei Starovoitov > --- > kernel/bpf/syscall.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c > index 0daf098e3207..8bcf48e31a5a 100644 > --- a/kernel/bpf/syscall.c > +++ b/kernel/bpf/syscall.c > @@ -582,14 +582,14 @@ int bpf_map_alloc_pages(const struct bpf_map *map, gfp_t gfp, int nid, This makes the gfp parameter unused? And the callers are passing GFP_KERNEL anyway? Isn't try_alloc_pages() rather useful for some context that did not even try to allocate until now, but now it could? Also unless my concerns about page_owner were wrong, this is where they could manifest. > old_memcg = set_active_memcg(memcg); > #endif > for (i = 0; i < nr_pages; i++) { > - pg = alloc_pages_node(nid, gfp | __GFP_ACCOUNT, 0); > + pg = try_alloc_pages(nid, 0); > > if (pg) { > pages[i] = pg; > continue; > } > for (j = 0; j < i; j++) > - __free_page(pages[j]); > + free_pages_nolock(pages[j], 0); > ret = -ENOMEM; > break; > }