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truncate_pagecache_range(9) - phpMan

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TRUNCATE_PAGECACHE_R(9)             Memory Management in Linux            TRUNCATE_PAGECACHE_R(9)



NAME
       truncate_pagecache_range - unmap and remove pagecache that is hole-punched

SYNOPSIS
       void truncate_pagecache_range(struct inode * inode, loff_t lstart, loff_t lend);

ARGUMENTS
       inode
           inode

       lstart
           offset of beginning of hole

       lend
           offset of last byte of hole

DESCRIPTION
       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.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   TRUNCATE_PAGECACHE_R(9)


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