Query: truncate_pagecache
OS: centos
Section: 9
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
TRUNCATE_PAGECACHE(9) Memory Management in Linux TRUNCATE_PAGECACHE(9)NAMEtruncate_pagecache - unmap and remove pagecache that has been truncatedSYNOPSISvoid truncate_pagecache(struct inode * inode, loff_t oldsize, loff_t newsize);ARGUMENTSinode inode oldsize old file size newsize new file sizeDESCRIPTIONinode's new i_size must already be written before truncate_pagecache is called. This function should typically be called before the filesystem releases resources associated with the freed range (eg. deallocates blocks). This way, pagecache will always stay logically coherent with on-disk format, and the filesystem would not have to deal with situations such as writepage being called for a page that has already had its underlying blocks deallocated.COPYRIGHTKernel Hackers Manual 3.10 June 2014 TRUNCATE_PAGECACHE(9)
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