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replace_page_cache_page(9) [centos man page]

REPLACE_PAGE_CACHE_P(9) 				    Memory Management in Linux					   REPLACE_PAGE_CACHE_P(9)

NAME
replace_page_cache_page - replace a pagecache page with a new one SYNOPSIS
int replace_page_cache_page(struct page * old, struct page * new, gfp_t gfp_mask); ARGUMENTS
old page to be replaced new page to replace with gfp_mask allocation mode DESCRIPTION
This function replaces a page in the pagecache with a new one. On success it acquires the pagecache reference for the new page and drops it for the old page. Both the old and new pages must be locked. This function does not add the new page to the LRU, the caller must do that. The remove + add is atomic. The only way this function can fail is memory allocation failure. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 REPLACE_PAGE_CACHE_P(9)

Check Out this Related Man Page

CALL_USERMODEHELPER_(9) 					  Module Support					   CALL_USERMODEHELPER_(9)

NAME
call_usermodehelper_setup - prepare to call a usermode helper SYNOPSIS
struct subprocess_info * call_usermodehelper_setup(char * path, char ** argv, char ** envp, gfp_t gfp_mask, int (*init) (struct subprocess_info *info, struct cred *new), void (*cleanup) (struct subprocess_info *info), void * data); ARGUMENTS
path path to usermode executable argv arg vector for process envp environment for process gfp_mask gfp mask for memory allocation init an init function cleanup a cleanup function data arbitrary context sensitive data DESCRIPTION
Returns either NULL on allocation failure, or a subprocess_info structure. This should be passed to call_usermodehelper_exec to exec the process and free the structure. The init function is used to customize the helper process prior to exec. A non-zero return code causes the process to error out, exit, and return the failure to the calling process The cleanup function is just before ethe subprocess_info is about to be freed. This can be used for freeing the argv and envp. The Function must be runnable in either a process context or the context in which call_usermodehelper_exec is called. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 CALL_USERMODEHELPER_(9)

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