https://github.com/torvalds/linux
Revision a501a0703044f00180d7697b32cacd7ff46d02d8 authored by Matthew Wilcox (Oracle) on 20 September 2023, 03:53:35 UTC, committed by Andrew Morton on 30 September 2023, 00:20:45 UTC
Even though we had successfully mapped the relevant page, we would rarely
return success from filemap_map_folio_range().  That leads to falling back
from the VMA lock path to the mmap_lock path, which is a speed &
scalability issue.  Found by inspection.

Link: https://lkml.kernel.org/r/20230920035336.854212-1-willy@infradead.org
Fixes: 617c28ecab22 ("filemap: batch PTE mappings")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
1 parent 7c31515
History
Tip revision: a501a0703044f00180d7697b32cacd7ff46d02d8 authored by Matthew Wilcox (Oracle) on 20 September 2023, 03:53:35 UTC
mm: report success more often from filemap_map_folio_range()
Tip revision: a501a07
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