Signed-off-by: Nitin Gupta <ngupta@xxxxxxxxxx> --- Documentation/ABI/testing/sysfs-kernel-mm-zcache | 53 ++++++++++++++++++++++ 1 files changed, 53 insertions(+), 0 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-kernel-mm-zcache diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-zcache b/Documentation/ABI/testing/sysfs-kernel-mm-zcache new file mode 100644 index 0000000..7ee3f31 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-kernel-mm-zcache @@ -0,0 +1,53 @@ +What: /sys/kernel/mm/zcache +Date: July 2010 +Contact: Nitin Gupta <ngupta@xxxxxxxxxx> +Description: + /sys/kernel/mm/zcache directory contains compressed cache + statistics for each pool. A separate pool is created for + every mount instance of cleancache-aware filesystems. + +What: /sys/kernel/mm/zcache/pool<id>/zero_pages +Date: July 2010 +Contact: Nitin Gupta <ngupta@xxxxxxxxxx> +Description: + The zero_pages file is read-only and specifies number of zero + filled pages found in this pool. + +What: /sys/kernel/mm/zcache/pool<id>/orig_data_size +Date: July 2010 +Contact: Nitin Gupta <ngupta@xxxxxxxxxx> +Description: + The orig_data_size file is read-only and specifies uncompressed + size of data stored in this pool. This excludes zero-filled + pages (zero_pages) since no memory is allocated for them. + Unit: bytes + +What: /sys/kernel/mm/zcache/pool<id>/compr_data_size +Date: July 2010 +Contact: Nitin Gupta <ngupta@xxxxxxxxxx> +Description: + The compr_data_size file is read-only and specifies compressed + size of data stored in this pool. So, compression ratio can be + calculated using orig_data_size and this statistic. + Unit: bytes + +What: /sys/kernel/mm/zcache/pool<id>/mem_used_total +Date: July 2010 +Contact: Nitin Gupta <ngupta@xxxxxxxxxx> +Description: + The mem_used_total file is read-only and specifies the amount + of memory, including allocator fragmentation and metadata + overhead, allocated for this pool. So, allocator space + efficiency can be calculated using compr_data_size and this + statistic. + Unit: bytes + +What: /sys/kernel/mm/zcache/pool<id>/memlimit +Date: July 2010 +Contact: Nitin Gupta <ngupta@xxxxxxxxxx> +Description: + The memlimit file is read-write and specifies upper bound on + the compressed data size (compr_data_dize) stored in this pool. + The value specified is rounded down to nearest multiple of + PAGE_SIZE. + Unit: bytes \ No newline at end of file -- 1.7.1.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>