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Tue, 18 Feb 2025 14:15:55 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id qjSSCRuWtGfjXQAAD6G6ig (envelope-from ); Tue, 18 Feb 2025 14:15:55 +0000 Message-ID: Date: Tue, 18 Feb 2025 15:15:54 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/4] selftests/mm: rename guard-pages to guard-regions Content-Language: en-US To: Lorenzo Stoakes , Andrew Morton Cc: Suren Baghdasaryan , "Liam R . Howlett" , Matthew Wilcox , "Paul E . McKenney" , Jann Horn , David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Shuah Khan , linux-kselftest@vger.kernel.org, linux-api@vger.kernel.org, John Hubbard , Juan Yescas , Kalesh Singh References: <1c3cd04a3f69b5756b94bda701ac88325a9be18b.1739469950.git.lorenzo.stoakes@oracle.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: <1c3cd04a3f69b5756b94bda701ac88325a9be18b.1739469950.git.lorenzo.stoakes@oracle.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 3A204A002D X-Stat-Signature: u4d1z4ex53c5hbd6jkp9aq5i8a5qiibr X-Rspam-User: X-HE-Tag: 1739888157-820597 X-HE-Meta: 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 Kb51J1Qi xczTUi6HBHnMmlaz+yU0NXrhRChAeOVf3H05uO9/7GpcL/JsHOBdgBL3D3MdWJEC/fkquJt/npQluopKBvYWq2v0enQuE+t/4sWYc/aHULWzDzT6e2EDx/89wxMp+2+ViruFpIEheb92jihuw6tuHw+IkgsZ4TE4ttgBaxDXqKl2jp2lM9Fle5Fc2l0UAwCjU6GEJ+Wc3wMMXRSPUK6IBNNXEPF9WFOBoMBh2VCQZRr2O4ecKi93saXUOMaWADQQVHiuP1WIaq8mfpoO4/dhIr6teFsSISbSKHtSPXSFSU2cZKQ5R32eyJqk2mQ== 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 2/13/25 19:17, Lorenzo Stoakes wrote: > The feature formerly referred to as guard pages is more correctly referred > to as 'guard regions', as in fact no pages are ever allocated in the > process of installing the regions. > > To avoid confusion, rename the tests accordingly. > > Signed-off-by: Lorenzo Stoakes Acked-by: Vlastimil Babka > --- > tools/testing/selftests/mm/.gitignore | 2 +- > tools/testing/selftests/mm/Makefile | 2 +- > .../mm/{guard-pages.c => guard-regions.c} | 42 +++++++++---------- > 3 files changed, 23 insertions(+), 23 deletions(-) > rename tools/testing/selftests/mm/{guard-pages.c => guard-regions.c} (98%) > > diff --git a/tools/testing/selftests/mm/.gitignore b/tools/testing/selftests/mm/.gitignore > index 121000c28c10..c5241b193db8 100644 > --- a/tools/testing/selftests/mm/.gitignore > +++ b/tools/testing/selftests/mm/.gitignore > @@ -57,4 +57,4 @@ droppable > hugetlb_dio > pkey_sighandler_tests_32 > pkey_sighandler_tests_64 > -guard-pages > +guard-regions > diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile > index 63ce39d024bb..8270895039d1 100644 > --- a/tools/testing/selftests/mm/Makefile > +++ b/tools/testing/selftests/mm/Makefile > @@ -97,7 +97,7 @@ TEST_GEN_FILES += hugetlb_fault_after_madv > TEST_GEN_FILES += hugetlb_madv_vs_map > TEST_GEN_FILES += hugetlb_dio > TEST_GEN_FILES += droppable > -TEST_GEN_FILES += guard-pages > +TEST_GEN_FILES += guard-regions > > ifneq ($(ARCH),arm64) > TEST_GEN_FILES += soft-dirty > diff --git a/tools/testing/selftests/mm/guard-pages.c b/tools/testing/selftests/mm/guard-regions.c > similarity index 98% > rename from tools/testing/selftests/mm/guard-pages.c > rename to tools/testing/selftests/mm/guard-regions.c > index ece37212a8a2..7a41cf9ffbdf 100644 > --- a/tools/testing/selftests/mm/guard-pages.c > +++ b/tools/testing/selftests/mm/guard-regions.c > @@ -107,12 +107,12 @@ static bool try_read_write_buf(char *ptr) > return try_read_buf(ptr) && try_write_buf(ptr); > } > > -FIXTURE(guard_pages) > +FIXTURE(guard_regions) > { > unsigned long page_size; > }; > > -FIXTURE_SETUP(guard_pages) > +FIXTURE_SETUP(guard_regions) > { > struct sigaction act = { > .sa_handler = &handle_fatal, > @@ -126,7 +126,7 @@ FIXTURE_SETUP(guard_pages) > self->page_size = (unsigned long)sysconf(_SC_PAGESIZE); > }; > > -FIXTURE_TEARDOWN(guard_pages) > +FIXTURE_TEARDOWN(guard_regions) > { > struct sigaction act = { > .sa_handler = SIG_DFL, > @@ -137,7 +137,7 @@ FIXTURE_TEARDOWN(guard_pages) > sigaction(SIGSEGV, &act, NULL); > } > > -TEST_F(guard_pages, basic) > +TEST_F(guard_regions, basic) > { > const unsigned long NUM_PAGES = 10; > const unsigned long page_size = self->page_size; > @@ -231,7 +231,7 @@ TEST_F(guard_pages, basic) > } > > /* Assert that operations applied across multiple VMAs work as expected. */ > -TEST_F(guard_pages, multi_vma) > +TEST_F(guard_regions, multi_vma) > { > const unsigned long page_size = self->page_size; > char *ptr_region, *ptr, *ptr1, *ptr2, *ptr3; > @@ -367,7 +367,7 @@ TEST_F(guard_pages, multi_vma) > * Assert that batched operations performed using process_madvise() work as > * expected. > */ > -TEST_F(guard_pages, process_madvise) > +TEST_F(guard_regions, process_madvise) > { > const unsigned long page_size = self->page_size; > pid_t pid = getpid(); > @@ -467,7 +467,7 @@ TEST_F(guard_pages, process_madvise) > } > > /* Assert that unmapping ranges does not leave guard markers behind. */ > -TEST_F(guard_pages, munmap) > +TEST_F(guard_regions, munmap) > { > const unsigned long page_size = self->page_size; > char *ptr, *ptr_new1, *ptr_new2; > @@ -505,7 +505,7 @@ TEST_F(guard_pages, munmap) > } > > /* Assert that mprotect() operations have no bearing on guard markers. */ > -TEST_F(guard_pages, mprotect) > +TEST_F(guard_regions, mprotect) > { > const unsigned long page_size = self->page_size; > char *ptr; > @@ -553,7 +553,7 @@ TEST_F(guard_pages, mprotect) > } > > /* Split and merge VMAs and make sure guard pages still behave. */ > -TEST_F(guard_pages, split_merge) > +TEST_F(guard_regions, split_merge) > { > const unsigned long page_size = self->page_size; > char *ptr, *ptr_new; > @@ -684,7 +684,7 @@ TEST_F(guard_pages, split_merge) > } > > /* Assert that MADV_DONTNEED does not remove guard markers. */ > -TEST_F(guard_pages, dontneed) > +TEST_F(guard_regions, dontneed) > { > const unsigned long page_size = self->page_size; > char *ptr; > @@ -737,7 +737,7 @@ TEST_F(guard_pages, dontneed) > } > > /* Assert that mlock()'ed pages work correctly with guard markers. */ > -TEST_F(guard_pages, mlock) > +TEST_F(guard_regions, mlock) > { > const unsigned long page_size = self->page_size; > char *ptr; > @@ -810,7 +810,7 @@ TEST_F(guard_pages, mlock) > * > * - Moving a mapping alone should retain markers as they are. > */ > -TEST_F(guard_pages, mremap_move) > +TEST_F(guard_regions, mremap_move) > { > const unsigned long page_size = self->page_size; > char *ptr, *ptr_new; > @@ -857,7 +857,7 @@ TEST_F(guard_pages, mremap_move) > * will have to remove guard pages manually to fix up (they'd have to do the > * same if it were a PROT_NONE mapping). > */ > -TEST_F(guard_pages, mremap_expand) > +TEST_F(guard_regions, mremap_expand) > { > const unsigned long page_size = self->page_size; > char *ptr, *ptr_new; > @@ -920,7 +920,7 @@ TEST_F(guard_pages, mremap_expand) > * if the user were using a PROT_NONE mapping they'd have to manually fix this > * up also so this is OK. > */ > -TEST_F(guard_pages, mremap_shrink) > +TEST_F(guard_regions, mremap_shrink) > { > const unsigned long page_size = self->page_size; > char *ptr; > @@ -984,7 +984,7 @@ TEST_F(guard_pages, mremap_shrink) > * Assert that forking a process with VMAs that do not have VM_WIPEONFORK set > * retain guard pages. > */ > -TEST_F(guard_pages, fork) > +TEST_F(guard_regions, fork) > { > const unsigned long page_size = self->page_size; > char *ptr; > @@ -1039,7 +1039,7 @@ TEST_F(guard_pages, fork) > * Assert expected behaviour after we fork populated ranges of anonymous memory > * and then guard and unguard the range. > */ > -TEST_F(guard_pages, fork_cow) > +TEST_F(guard_regions, fork_cow) > { > const unsigned long page_size = self->page_size; > char *ptr; > @@ -1110,7 +1110,7 @@ TEST_F(guard_pages, fork_cow) > * Assert that forking a process with VMAs that do have VM_WIPEONFORK set > * behave as expected. > */ > -TEST_F(guard_pages, fork_wipeonfork) > +TEST_F(guard_regions, fork_wipeonfork) > { > const unsigned long page_size = self->page_size; > char *ptr; > @@ -1160,7 +1160,7 @@ TEST_F(guard_pages, fork_wipeonfork) > } > > /* Ensure that MADV_FREE retains guard entries as expected. */ > -TEST_F(guard_pages, lazyfree) > +TEST_F(guard_regions, lazyfree) > { > const unsigned long page_size = self->page_size; > char *ptr; > @@ -1196,7 +1196,7 @@ TEST_F(guard_pages, lazyfree) > } > > /* Ensure that MADV_POPULATE_READ, MADV_POPULATE_WRITE behave as expected. */ > -TEST_F(guard_pages, populate) > +TEST_F(guard_regions, populate) > { > const unsigned long page_size = self->page_size; > char *ptr; > @@ -1222,7 +1222,7 @@ TEST_F(guard_pages, populate) > } > > /* Ensure that MADV_COLD, MADV_PAGEOUT do not remove guard markers. */ > -TEST_F(guard_pages, cold_pageout) > +TEST_F(guard_regions, cold_pageout) > { > const unsigned long page_size = self->page_size; > char *ptr; > @@ -1268,7 +1268,7 @@ TEST_F(guard_pages, cold_pageout) > } > > /* Ensure that guard pages do not break userfaultd. */ > -TEST_F(guard_pages, uffd) > +TEST_F(guard_regions, uffd) > { > const unsigned long page_size = self->page_size; > int uffd;