diff options
| author | Matthew Wilcox (Oracle) <[email protected]> | 2024-02-26 20:55:28 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2024-03-05 01:01:19 +0000 |
| commit | 8897277acfef7f70fdecc054073bea2542fc7a1b (patch) | |
| tree | 2e00108c1b272998e58142cf10cd249e35dea4ea /mm/filemap.c | |
| parent | mm/huge_memory: only split PMD mapping when necessary in unmap_folio() (diff) | |
| download | kernel-8897277acfef7f70fdecc054073bea2542fc7a1b.tar.gz kernel-8897277acfef7f70fdecc054073bea2542fc7a1b.zip | |
mm: support order-1 folios in the page cache
Folios of order 1 have no space to store the deferred list. This is not a
problem for the page cache as file-backed folios are never placed on the
deferred list. All we need to do is prevent the core MM from touching the
deferred list for order 1 folios and remove the code which prevented us
from allocating order 1 folios.
Link: https://lore.kernel.org/linux-mm/[email protected]/
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Signed-off-by: Zi Yan <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Luis Chamberlain <[email protected]>
Cc: Michal Koutny <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Ryan Roberts <[email protected]>
Cc: Yang Shi <[email protected]>
Cc: Yu Zhao <[email protected]>
Cc: Zach O'Keefe <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index b7a21551fbc7..b4858d89f1b1 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1912,8 +1912,6 @@ no_page: gfp_t alloc_gfp = gfp; err = -ENOMEM; - if (order == 1) - order = 0; if (order > 0) alloc_gfp |= __GFP_NORETRY | __GFP_NOWARN; folio = filemap_alloc_folio(alloc_gfp, order); |