f1e3cfff4d
Automated renames in code: - rzs* -> zram* - RZS* -> ZRAM* - ramzswap* -> zram* Manual changes: - Edited comments/messages mentioning "swap" Signed-off-by: Nitin Gupta <ngupta@vflare.org> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
/*
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* Compressed RAM block device
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*
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* Copyright (C) 2008, 2009, 2010 Nitin Gupta
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*
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* This code is released using a dual license strategy: BSD/GPL
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* You can choose the licence that better fits your requirements.
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*
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* Released under the terms of 3-clause BSD License
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* Released under the terms of GNU General Public License Version 2.0
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*
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* Project home: http://compcache.googlecode.com
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*/
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#ifndef _ZRAM_IOCTL_H_
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#define _ZRAM_IOCTL_H_
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struct zram_ioctl_stats {
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u64 disksize; /* disksize in bytes (user specifies in KB) */
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u64 num_reads; /* failed + successful */
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u64 num_writes; /* --do-- */
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u64 failed_reads; /* should NEVER! happen */
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u64 failed_writes; /* can happen when memory is too low */
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u64 invalid_io; /* non-page-aligned I/O requests */
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u64 notify_free; /* no. of swap slot free notifications */
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u32 pages_zero; /* no. of zero filled pages */
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u32 good_compress_pct; /* no. of pages with compression ratio<=50% */
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u32 pages_expand_pct; /* no. of incompressible pages */
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u32 pages_stored;
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u32 pages_used;
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u64 orig_data_size;
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u64 compr_data_size;
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u64 mem_used_total;
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} __attribute__ ((packed, aligned(4)));
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#define ZRAMIO_SET_DISKSIZE_KB _IOW('z', 0, size_t)
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#define ZRAMIO_GET_STATS _IOR('z', 1, struct zram_ioctl_stats)
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#define ZRAMIO_INIT _IO('z', 2)
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#define ZRAMIO_RESET _IO('z', 3)
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#endif
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