Function report |
Source Code:mm\filemap.c |
Create Date:2022-07-28 14:03:21 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:Find or create a page at the given pagecache position. Return the locked* page. This function is specifically for buffered writes.
Proto:struct page *grab_cache_page_write_begin(struct address_space *mapping, unsigned long index, unsigned flags)
Type:struct page
Parameter:
Type | Parameter | Name |
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struct address_space * | mapping | |
unsigned long | index | |
unsigned | flags |
3256 | If flags & used by filesystem to direct* helper code (eg buffer layer)* to clear GFP_FS from alloc Then fgp_flags |= FGP_NOFS |
3261 | If page Then wait_for_stable_page(page) |
3264 | Return page |
Name | Describe |
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block_write_begin | lock_write_begin takes care of the basic task of block allocation and* bringing partial write blocks uptodate first.* The filesystem needs to handle block truncation upon failure. |
nobh_write_begin | On entry, the page is fully not uptodate.* On exit the page is fully uptodate in the areas outside (from,to)* The filesystem needs to handle block truncation upon failure. |
iomap_write_begin |
Source code conversion tool public plug-in interface | X |
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Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion |