Re: [PATCH] mremap: Increase LATENCY_LIMIT of mremap to reduce the number of TLB shootdowns

Mel Gorman wrote: > On Wed, Jun 06, 2018 at 08:55:15AM -0700, Nadav Amit wrote: >>> -#define LATENCY_LIMIT (64 * PAGE_SIZE) >>> +#define LATENCY_LIMIT (PMD_SIZE) >>> >>> unsigned long move_page_tables(struct vm_area_struct *vma, >>> unsigned long old_addr, struct vm_area_st

Re: [PATCH] mremap: Increase LATENCY_LIMIT of mremap to reduce the number of TLB shootdowns

On Wed, Jun 06, 2018 at 08:55:15AM -0700, Nadav Amit wrote: > > -#define LATENCY_LIMIT (64 * PAGE_SIZE) > > +#define LATENCY_LIMIT (PMD_SIZE) > > > > unsigned long move_page_tables(struct vm_area_struct *vma, > > unsigned long old_addr, struct vm_area_struct *new_vma, > > Th

Re: [PATCH] mremap: Increase LATENCY_LIMIT of mremap to reduce the number of TLB shootdowns

Mel Gorman wrote: > Commit 5d1904204c99 ("mremap: fix race between mremap() and page cleanning") > fixed races between mremap and other operations for both file-backed and > anonymous mappings. The file-backed was the most critical as it allowed the > possibility that data could be changed on a p

[PATCH] mremap: Increase LATENCY_LIMIT of mremap to reduce the number of TLB shootdowns

Commit 5d1904204c99 ("mremap: fix race between mremap() and page cleanning") fixed races between mremap and other operations for both file-backed and anonymous mappings. The file-backed was the most critical as it allowed the possibility that data could be changed on a physical page after page_mkcl