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 lJmC/riP fObjH53SJ5dHZJIgQKwoFzgUpRoEKRvjIYtMzQmkznFz2nSjVzRIy4IsxPlcBQO4JMsEAViBwe8A1+FaU2X9tmBj2LIdDYyoeZXzvTxXBu6KzmHcJXUR1iVI5OdntB9w8Nh1fiUjSQGp/0Syol1mVQDmcq/Nj3HFh1e+Lkvg2c+UD6Sw4bdm4Y32VCGhiaOOMFKdXP30G5SK4IToC2vN5KWkve50nxORlGug0hBsqc//VPXW2HbZNZ+UvIjU0H8JRsvobwY5OvXf/BmKF3Gy9NNgDxMaD1PiS9wjt7HcGsSabE7ta0ENNkT9aoAoB43dgBer2npWEz0bN85vH13oEfdp84StQM8TrPHQvnuTvTZINZTr0r+y6PThj5VezhYwmefOZSm6Jyj+63JcwOiInutFhN0mFfVjkVcb+rnswh+QIha2OQB4zjtBovnVlnJBQbWDkWlO3/kWNeyenYN1oEeeK7f8nX+lbgs0e X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 09/07/23 14:58, Muchun Song wrote: > > > On 2023/9/6 05:44, Mike Kravetz wrote: > > Update the hugetlb_vmemmap_restore path to take a 'batch' parameter that > > s/batch/flags/g > > And it should be reworked since the parameter has been changed. Yes. > > > indicates restoration is happening on a batch of pages. When set, use > > the existing mechanism (VMEMMAP_NO_TLB_FLUSH) to delay TLB flushing. > > The routine hugetlb_vmemmap_restore_folios is the only user of this new > > batch parameter and it will perform a global flush after all vmemmap is > > restored. > > > > Signed-off-by: Joao Martins > > Signed-off-by: Mike Kravetz > > --- > > mm/hugetlb_vmemmap.c | 37 +++++++++++++++++++++++-------------- > > 1 file changed, 23 insertions(+), 14 deletions(-) > > > > diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c > > index 8c85e2c38538..11fda9d061eb 100644 > > --- a/mm/hugetlb_vmemmap.c > > +++ b/mm/hugetlb_vmemmap.c > > @@ -458,17 +458,19 @@ static int alloc_vmemmap_page_list(unsigned long start, unsigned long end, > > * @end: end address of the vmemmap virtual address range that we want to > > * remap. > > * @reuse: reuse address. > > + * @flags: modify behavior for bulk operations > > * > > * Return: %0 on success, negative error code otherwise. > > */ > > static int vmemmap_remap_alloc(unsigned long start, unsigned long end, > > - unsigned long reuse) > > + unsigned long reuse, unsigned long flags) > > { > > LIST_HEAD(vmemmap_pages); > > struct vmemmap_remap_walk walk = { > > .remap_pte = vmemmap_restore_pte, > > .reuse_addr = reuse, > > .vmemmap_pages = &vmemmap_pages, > > + .flags = flags, > > }; > > /* See the comment in the vmemmap_remap_free(). */ > > @@ -490,17 +492,7 @@ EXPORT_SYMBOL(hugetlb_optimize_vmemmap_key); > > static bool vmemmap_optimize_enabled = IS_ENABLED(CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON); > > core_param(hugetlb_free_vmemmap, vmemmap_optimize_enabled, bool, 0); > > -/** > > - * hugetlb_vmemmap_restore - restore previously optimized (by > > - * hugetlb_vmemmap_optimize()) vmemmap pages which > > - * will be reallocated and remapped. > > - * @h: struct hstate. > > - * @head: the head page whose vmemmap pages will be restored. > > - * > > - * Return: %0 if @head's vmemmap pages have been reallocated and remapped, > > - * negative error code otherwise. > > - */ > > -int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head) > > +static int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head, unsigned long flags) > > { > > int ret; > > unsigned long vmemmap_start = (unsigned long)head, vmemmap_end; > > @@ -521,7 +513,7 @@ int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head) > > * When a HugeTLB page is freed to the buddy allocator, previously > > * discarded vmemmap pages must be allocated and remapping. > > */ > > - ret = vmemmap_remap_alloc(vmemmap_start, vmemmap_end, vmemmap_reuse); > > + ret = vmemmap_remap_alloc(vmemmap_start, vmemmap_end, vmemmap_reuse, flags); > > if (!ret) { > > ClearHPageVmemmapOptimized(head); > > static_branch_dec(&hugetlb_optimize_vmemmap_key); > > @@ -530,6 +522,21 @@ int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head) > > return ret; > > } > > +/** > > + * hugetlb_vmemmap_restore - restore previously optimized (by > > + * hugetlb_vmemmap_optimize()) vmemmap pages which > > + * will be reallocated and remapped. > > + * @h: struct hstate. > > + * @head: the head page whose vmemmap pages will be restored. > > + * > > + * Return: %0 if @head's vmemmap pages have been reallocated and remapped, > > + * negative error code otherwise. > > + */ > > +int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head) > > +{ > > + return __hugetlb_vmemmap_restore(h, head, 0UL); > > UL suffix could be drooped. Thanks, will fix both in next version. -- Mike Kravetz