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| author |   Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-11-08 18:28:05 +0000 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2023-12-10 16:51:38 -0800 |
| commit | 01d1e0e6b7d99ebaf2e42d2205595080b7d0c271 (patch) | |
| tree | 44908edde8dda5f68929a2052dd1b8446e790590 /mm/page_alloc.c | |
| parent | mm: make mapping_evict_folio() the preferred way to evict clean folios (diff) | |
| download | wireguard-linux-01d1e0e6b7d99ebaf2e42d2205595080b7d0c271.tar.xz wireguard-linux-01d1e0e6b7d99ebaf2e42d2205595080b7d0c271.zip | |
mm: convert __do_fault() to use a folio
Convert vmf->page to a folio as soon as we're going to use it. This fixes
a bug if the fault handler returns a tail page with hardware poison; tail
pages have an invalid page->index, so we would fail to unmap the page from
the page tables. We actually have to unmap the entire folio (or
mapping_evict_folio() will fail), so use unmap_mapping_folio() instead.
This also saves various calls to compound_head() hidden in lock_page(),
put_page(), etc.
Link: https://lkml.kernel.org/r/20231108182809.602073-3-willy@infradead.org
Fixes: 793917d997df ("mm/readahead: Add large folio readahead")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
0 files changed, 0 insertions, 0 deletions