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| author | Lorenzo Stoakes <ljs@kernel.org> | 2026-06-19 12:28:51 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-06-21 11:37:38 -0700 |
| commit | 13a1e1a618858407fa12c391f664ea750651f6b2 (patch) | |
| tree | a37196f4677422ebfe2ab1a426a4a0583b14bfba /include/linux | |
| parent | 44238b122ae834ac52748e59809a139a2cb8409b (diff) | |
| download | linux-next-13a1e1a618858407fa12c391f664ea750651f6b2.tar.gz linux-next-13a1e1a618858407fa12c391f664ea750651f6b2.zip | |
Revert "mm: limit filemap_fault readahead to VMA boundaries"
This reverts commit 7b32f64bc512b40b268776c5ac4d354b325b3197.
This patch caused a significant performance regression, so revert it, and
we can determine whether the approach is sensible or not moving forwards,
and if so how to avoid this.
There was a merge conflict with commit de97ae6222c1 ("mm/readahead: no
PG_readahead on EOF"), care was taken to ensure that the revert retained
the behaviour of this patch and cleanly reverts commit 7b32f64bc512 ("mm:
limit filemap_fault readahead to VMA boundaries") only.
Link: https://lore.kernel.org/20260619112852.104213-1-ljs@kernel.org
Fixes: 7b32f64bc512 ("mm: limit filemap_fault readahead to VMA boundaries")
Signed-off-by: Lorenzo Stoakes <ljs@kernel.org>
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202606181547.617a6967-lkp@intel.com
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Pedro Falcato <pfalcato@suse.de>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Kalesh Singh <kaleshsingh@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pagemap.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 627771e82eb1..2c3718d592d6 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -1348,7 +1348,6 @@ struct readahead_control { struct file_ra_state *ra; /* private: use the readahead_* accessors instead */ pgoff_t _index; - pgoff_t _max_index; /* limit readahead to _max_index, inclusive */ unsigned int _nr_pages; unsigned int _batch_count; bool dropbehind; @@ -1362,7 +1361,6 @@ struct readahead_control { .mapping = m, \ .ra = r, \ ._index = i, \ - ._max_index = ULONG_MAX, \ } #define VM_READAHEAD_PAGES (SZ_128K / PAGE_SIZE) |