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mm: mmap: no need to call khugepaged_enter_vma() for stack

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We avoid allocating THP for temporary stack, even though
khugepaged_enter_vma() is called for stack VMAs, it actualy returns
false.  So no need to call it in the first place at all.

Link: https://lkml.kernel.org/r/20231221065943.2803551-1-shy828301@gmail.com
Signed-off-by: Yang Shi <yang@os.amperecomputing.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Cc: Christopher Lameter <cl@linux.com>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Yang Shi 2023-12-20 22:59:42 -08:00 committed by Andrew Morton
parent a02b8bfe9a
commit 05976a42b3
1 changed files with 0 additions and 2 deletions
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2
mm/mmap.c
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@ -2051,7 +2051,6 @@ static int expand_upwards(struct vm_area_struct *vma, unsigned long address)
}
}
anon_vma_unlock_write(vma->anon_vma);
khugepaged_enter_vma(vma, vma->vm_flags);
mas_destroy(&mas);
validate_mm(mm);
return error;
@ -2145,7 +2144,6 @@ int expand_downwards(struct vm_area_struct *vma, unsigned long address)
}
}
anon_vma_unlock_write(vma->anon_vma);
khugepaged_enter_vma(vma, vma->vm_flags);
mas_destroy(&mas);
validate_mm(mm);
return error;