- 03 Feb, 2023 40 commits
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Sidhartha Kumar authored
Patch series "Get rid of tail page fields". Continue the shrinkage of the struct page definition by getting rid of the 'first tail page' and 'second tail page' fields. I originally did this patch set before Hugh's rewrite of the subpages_mapcount, so it needed substantial updates; hope I didn't miss anything. This patch (of 28): commit dad6a5eb(mm,hugetlb: use folio fields in second tail page) added a transitional hugetlb field to struct page and struct folio to make room for another int in the first tail of a compound page. Hugetlb folio conversions have changed all page users of this field to use the fields within the folio so struct page no longer needs this hugetlb specific field. Link: https://lkml.kernel.org/r/20230111142915.1001531-1-willy@infradead.org Link: https://lkml.kernel.org/r/20230111142915.1001531-29-willy@infradead.orgSigned-off-by:
Sidhartha Kumar <sidhartha.kumar@oracle.com> Signed-off-by:
Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org>
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Matthew Wilcox (Oracle) authored
Now that both callers use a folio, pass the folio in and save a call to compound_head(). Link: https://lkml.kernel.org/r/20230111142915.1001531-28-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Removes a few calls to compound_head(). Link: https://lkml.kernel.org/r/20230111142915.1001531-27-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Use folio->_deferred_list directly. Link: https://lkml.kernel.org/r/20230111142915.1001531-26-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Remove the entire block of definitions for the second tail page, and add the deferred list to the struct folio. This actually moves _deferred_list to a different offset in struct folio because I don't see a need to include the padding. This lets us use list_for_each_entry_safe() in deferred_split_scan() and avoid a number of calls to compound_head(). Link: https://lkml.kernel.org/r/20230111142915.1001531-25-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Insert appropriate public: and private: markers to make the generated kernel-doc look right. Link: https://lkml.kernel.org/r/20230111142915.1001531-24-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
All former users now use the folio equivalents, so remove them from the definition of struct page. Link: https://lkml.kernel.org/r/20230111142915.1001531-23-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Convert the entire file to use the folio equivalents. Link: https://lkml.kernel.org/r/20230111142915.1001531-22-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Replace a use of compound_dtor. Link: https://lkml.kernel.org/r/20230111142915.1001531-21-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Replace a use of page->compound_dtor with its folio equivalent. Link: https://lkml.kernel.org/r/20230111142915.1001531-20-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Replace uses of compound_dtor, compound_order and compound_nr by their folio equivalents. Link: https://lkml.kernel.org/r/20230111142915.1001531-19-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Turn compound_nr() into a wrapper around folio_nr_pages(). Similarly to compound_order(), casting the struct page directly to struct folio preserves the existing behaviour, while calling page_folio() would change the behaviour. Move thp_nr_pages() down in the file so that compound_nr() can be after folio_nr_pages(). [willy@infradead.org: fix assertion triggering] Link: https://lkml.kernel.org/r/Y8AFgZEEjnUIaCbf@casper.infradead.org Link: https://lkml.kernel.org/r/20230111142915.1001531-18-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Make compound_order() use struct folio. It can't be turned into a wrapper around folio_order() as a page can be turned into a tail page between a check in compound_order() and the assertion in folio_test_large(). Link: https://lkml.kernel.org/r/20230111142915.1001531-17-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
folio_mapcount_ptr(), compound_mapcount_ptr() and subpages_mapcount_ptr() are all now unused. Link: https://lkml.kernel.org/r/20230111142915.1001531-16-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Remove a use of head_compound_mapcount(). Link: https://lkml.kernel.org/r/20230111142915.1001531-15-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Use the entire_mapcount field directly. Link: https://lkml.kernel.org/r/20230111142915.1001531-14-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Call folio_entire_mapcount() instead. Link: https://lkml.kernel.org/r/20230111142915.1001531-13-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Remove the use of the compound_mapcount_ptr() wrapper, and add an assertion that we're not passing a tail page if we're duplicating a PMD. Link: https://lkml.kernel.org/r/20230111142915.1001531-12-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Remove uses of compound_mapcount_ptr() Link: https://lkml.kernel.org/r/20230111142915.1001531-11-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Rmove the uses of compound_mapcount_ptr(), head_compound_mapcount() and subpages_mapcount_ptr() Link: https://lkml.kernel.org/r/20230111142915.1001531-10-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
In contrast to other rmap functions, page_add_new_anon_rmap() is always called with a freshly allocated page. That means it can't be called with a tail page. Turn page_add_new_anon_rmap() into folio_add_new_anon_rmap() and add a page_add_new_anon_rmap() wrapper. Callers can be converted individually. [akpm@linux-foundation.org: fix NOMMU build. page_add_new_anon_rmap() requires CONFIG_MMU] [willy@infradead.org: folio-compat.c needs rmap.h] Link: https://lkml.kernel.org/r/20230111142915.1001531-9-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
The API for page_add_file_rmap() needs to be page-based, because we can add mappings of individual pages. But inside the function, we want to only call compound_head() once and then use the folio APIs instead of the page APIs that each call compound_head(). Link: https://lkml.kernel.org/r/20230111142915.1001531-8-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
The API for page_add_anon_rmap() needs to be page-based, because we can add mappings of individual pages. But inside the function, we want to only call compound_head() once and then use the folio APIs instead of the page APIs that each call compound_head(). Link: https://lkml.kernel.org/r/20230111142915.1001531-7-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
The API for page_remove_rmap() needs to be page-based, because we can remove mappings of pages individually. But inside the function, we want to only call compound_head() once and then use the folio APIs instead of the page APIs that each call compound_head(). Link: https://lkml.kernel.org/r/20230111142915.1001531-6-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Instead of enforcing that the argument must be a head page by naming, enforce it with the compiler by making it a folio. Also rename the counter in struct folio from _compound_mapcount to _entire_mapcount. Link: https://lkml.kernel.org/r/20230111142915.1001531-5-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Include the rename of subpages_mapcount to _nr_pages_mapped. Link: https://lkml.kernel.org/r/20230111142915.1001531-4-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
Calling this 'mapcount' is confusing since mapcount is usually the number of times something is mapped; instead this is the number of mapped pages. It's also better to enforce that this is a folio rather than a head page. Move folio_nr_pages_mapped() into mm/internal.h since this is not something we want device drivers or filesystems poking at. Get rid of folio_subpages_mapcount_ptr() and use folio->_nr_pages_mapped directly. Link: https://lkml.kernel.org/r/20230111142915.1001531-3-willy@infradead.orgSigned-off-by:
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Matthew Wilcox (Oracle) authored
We can use folio->_pincount directly, since all users are guarded by tests of compound/large. Link: https://lkml.kernel.org/r/20230111142915.1001531-2-willy@infradead.orgSigned-off-by:
John Hubbard <jhubbard@nvidia.com> Signed-off-by:
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Alistair Popple authored
mmu_notifier_range_update_to_read_only() was originally introduced in commit c6d23413 ("mm/mmu_notifier: mmu_notifier_range_update_to_read_only() helper") as an optimisation for device drivers that know a range has only been mapped read-only. However there are no users of this feature so remove it. As it is the only user of the struct mmu_notifier_range.vma field remove that also. Link: https://lkml.kernel.org/r/20230110025722.600912-1-apopple@nvidia.comSigned-off-by:
Alistair Popple <apopple@nvidia.com> Acked-by:
Mike Rapoport (IBM) <rppt@kernel.org> Reviewed-by:
Jason Gunthorpe <jgg@nvidia.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Mike Kravetz <mike.kravetz@oracle.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Ralph Campbell <rcampbell@nvidia.com> Signed-off-by:
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Baolin Wang authored
There is no need to calculate the fragmentation score for empty zones. Link: https://lkml.kernel.org/r/100331ad9d274a9725e687b00d85d75d7e4a17c7.1673342761.git.baolin.wang@linux.alibaba.comSigned-off-by:
Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by:
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Baolin Wang authored
Add missing kcompactd wakeup trace event for proactive compaction, meanwhile use order = -1 and the highest zone index of the pgdat for the kcompactd wakeup trace event by proactive compaction. Link: https://lkml.kernel.org/r/cbf8097a2d8a1b6800991f2a21575550d3613ce6.1673342761.git.baolin.wang@linux.alibaba.comSigned-off-by:
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Baolin Wang authored
The proactive compaction will reuse per-node kcompactd threads, so we should also count the KCOMPACTD_MIGRATE_SCANNED and KCOMPACTD_FREE_SCANNED events for proactive compaction. Link: https://lkml.kernel.org/r/b7f1ece1adc17defa47e3667b5f9fd61f496517a.1673342761.git.baolin.wang@linux.alibaba.comSigned-off-by:
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Baolin Wang authored
Move the cc.freepages and cc.migratepages list validation into compact_zone() to remove some duplicate code. Link: https://lkml.kernel.org/r/15cf54f7d762e87b04ac3cc74536f7d1ebbcd8cd.1673342761.git.baolin.wang@linux.alibaba.comSigned-off-by:
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Baolin Wang authored
Patch series "Some small improvements for compaction". When I did some compaction testing, I found some small room for improvement as well as some code cleanups. This patch (of 5): The compaction_suitable() will never return values other than COMPACT_SUCCESS, COMPACT_SKIPPED and COMPACT_CONTINUE, so after validation of COMPACT_SUCCESS and COMPACT_SKIPPED, we will never hit other unexpected case. Thus remove the redundant VM_BUG_ON() validation for the return values of compaction_suitable(). Link: https://lkml.kernel.org/r/cover.1673342761.git.baolin.wang@linux.alibaba.com Link: https://lkml.kernel.org/r/740a2396d9b98154dba76e326cba5e798b640ead.1673342761.git.baolin.wang@linux.alibaba.comSigned-off-by:
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Vernon Yang authored
Replace "parital" with "partial". Link: https://lkml.kernel.org/r/20230110145353.1658435-1-vernon2gm@gmail.comSigned-off-by:
Vernon Yang <vernon2gm@gmail.com> Cc: Liam Howlett <liam.howlett@oracle.com> Signed-off-by:
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Vernon Yang authored
The parameter entry of mas_preallocate is not used, so drop it. Link: https://lkml.kernel.org/r/20230110154211.1758562-1-vernon2gm@gmail.comSigned-off-by:
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SeongJae Park authored
A selftest case for DAMON debugfs interface has a test for expected failure. To make the test output clean, hide the expected failure error message. Link: https://lkml.kernel.org/r/20230110190400.119388-9-sj@kernel.orgSigned-off-by:
SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by:
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SeongJae Park authored
DAMON selftests for sysfs (sysfs.sh) tests if some writes to DAMON sysfs interface files fails as expected. It makes the test results noisy with the failure error message because it tests a number of such failures. Redirect the expected failure error messages to /dev/null to make the results clean. Link: https://lkml.kernel.org/r/20230110190400.119388-8-sj@kernel.orgSigned-off-by:
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SeongJae Park authored
Add links to below DAMON development related resource to DAMON section in MAINTAINERS file. - The basic policies and expectations of DAMON development, - DAMON development trees, and - DAMON introduction website. Link: https://lkml.kernel.org/r/20230110190400.119388-7-sj@kernel.orgSigned-off-by:
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SeongJae Park authored
Document the basic policies and expectations for DAMON development. Link: https://lkml.kernel.org/r/20230110190400.119388-6-sj@kernel.orgSigned-off-by:
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