linear_page_delta(9)

💅 NAME 💅

okay so bestie, welcome to linear_page_delta(9) from the Kernel API Manual — it's literally here to determine the relative page offset of @address within @vma, and it's giving helpful little helper energy. No cap. 💖

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🦋 SYNOPSIS 🦋

pgoff_t linear_page_delta (const struct vm_area_struct *vma , const
       unsigned long address );

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🎀 ARGUMENTS 🎀

• vma — the VMA where address resides, living its best life. 💫
• address — the address whose relative page offset is required, periodt. ✨

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💖 DESCRIPTION 💖

Okay so here's the tea: the result is identical for both file-backed and anonymous mappings, and it simply determines how many pages address lies from vma->vm_start. That's the whole vibe. 🦋

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🌸 RETURN 🌸

The number of pages address is offset by within vma, bestie. That's the return value. 💖

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👑 SEE ALSO 👑

Kernel file ./include/linux/pagemap.h is the home base, and here's the whole iconic SEE ALSO squad:

• filemap_set_wb_err(9)
• filemap_check_wb_err(9)
• filemap_sample_wb_err(9)
• file_sample_sb_err(9)
• mapping_set_error(9)
• mapping_set_large_folios(9)
• mapping_align_index(9)
• mapping_pmd_folio_support(9)
• folio_flush_mapping(9)
• folio_inode(9)
• folio_attach_private(9)
• folio_change_private(9)
• folio_detach_private(9)
• fgf_t(9)
• fgf_set_order(9)
• write_begin_get_folio(9)
• filemap_get_folio(9)
• filemap_lock_folio(9)
• filemap_grab_folio(9)
• find_get_page(9)
• find_lock_page(9)
• find_or_create_page(9)
• grab_cache_page_nowait(9)
• folio_next_index(9)
• folio_next_pos(9)
• folio_file_page(9)
• folio_contains(9)
• page_pgoff(9)
• folio_pos(9)
• linear_page_index(9)
• linear_anon_page_index(9)
• folio_trylock(9)
• folio_lock(9)
• lock_page(9)
• folio_lock_killable(9)
• filemap_range_needs_writeback(9)
• struct readahead_control(9)
• page_cache_sync_readahead(9)
• page_cache_async_readahead(9)
• readahead_folio(9)
• readahead_pos(9)
• readahead_length(9)
• readahead_index(9)
• readahead_count(9)
• readahead_batch_length(9)
• folio_mkwrite_check_truncate(9)
• i_blocks_per_folio(9)

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xoxo 💖 — this page came from the ./include/linux source/version, dated October 2026. linear_page_delta(9) out! 🎀✨