Function report |
Source Code:fs\dax.c |
Create Date:2022-07-28 20:23:11 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:TODO: for reflink+dax we need a way to associate a single page with* multiple address_space instances at different linear_page_index()* offsets.
Proto:static void dax_associate_entry(void *entry, struct address_space *mapping, struct vm_area_struct *vma, unsigned long address)
Type:void
Parameter:
Type | Parameter | Name |
---|---|---|
void * | entry | |
struct address_space * | mapping | |
struct vm_area_struct * | vma | |
unsigned long | address |
334 | size = dax_entry_size(entry) |
335 | i = 0 |
337 | If IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',* 0 otherwise.(CONFIG_FS_DAX_LIMITED) Then Return |
340 | index = linear_page_index(vma, address & ~(size - 1)) |
342 | page = pfn_to_page(pfn) |
346 | Our offset within mapping. = index + i++ |
Name | Describe |
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dax_insert_entry | By this point grab_mapping_entry() has ensured that we have a locked entry* of the appropriate size so we don't have to worry about downgrading PMDs to* PTEs |
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