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authorHugh Dickins <hughd@google.com>2012-06-01 06:15:28 +0200
committerTheodore Ts'o <tytso@mit.edu>2012-06-01 06:15:28 +0200
commit5e44f8c374dc4f8eadf61cd18b2c0d46bc87c1b7 (patch)
treeccecc6ddd068b809de59b45abe7714ee47076d95 /arch/arm/mach-exynos/include/mach/regs-clock.h
parentjbd2: use kmem_cache_zalloc wrapper instead of flag (diff)
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ext4: hole-punch use truncate_pagecache_range
When truncating a file, we unmap pages from userspace first, as that's usually more efficient than relying, page by page, on the fallback in truncate_inode_page() - particularly if the file is mapped many times. Do the same when punching a hole: 3.4 added truncate_pagecache_range() to do the unmap and trunc, so use it in ext4_ext_punch_hole(), instead of calling truncate_inode_pages_range() directly. Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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