Loading .gitignore +1 −0 Original line number Diff line number Diff line Loading @@ -27,6 +27,7 @@ *.gz *.lzma *.patch *.gcno # # Top-level generic files Loading CREDITS +6 −0 Original line number Diff line number Diff line Loading @@ -2006,6 +2006,9 @@ E: paul@laufernet.com D: Soundblaster driver fixes, ISAPnP quirk S: California, USA N: Jonathan Layes D: ARPD support N: Tom Lees E: tom@lpsg.demon.co.uk W: http://www.lpsg.demon.co.uk/ Loading Loading @@ -3802,6 +3805,9 @@ S: van Bronckhorststraat 12 S: 2612 XV Delft S: The Netherlands N: Thomas Woller D: CS461x Cirrus Logic sound driver N: David Woodhouse E: dwmw2@infradead.org D: JFFS2 file system, Memory Technology Device subsystem, Loading Documentation/ABI/testing/sysfs-block +23 −14 Original line number Diff line number Diff line Loading @@ -94,28 +94,37 @@ What: /sys/block/<disk>/queue/physical_block_size Date: May 2009 Contact: Martin K. Petersen <martin.petersen@oracle.com> Description: This is the smallest unit the storage device can write without resorting to read-modify-write operation. It is usually the same as the logical block size but may be bigger. One example is SATA drives with 4KB sectors that expose a 512-byte logical block size to the operating system. This is the smallest unit a physical storage device can write atomically. It is usually the same as the logical block size but may be bigger. One example is SATA drives with 4KB sectors that expose a 512-byte logical block size to the operating system. For stacked block devices the physical_block_size variable contains the maximum physical_block_size of the component devices. What: /sys/block/<disk>/queue/minimum_io_size Date: April 2009 Contact: Martin K. Petersen <martin.petersen@oracle.com> Description: Storage devices may report a preferred minimum I/O size, which is the smallest request the device can perform without incurring a read-modify-write penalty. For disk drives this is often the physical block size. For RAID arrays it is often the stripe chunk size. Storage devices may report a granularity or preferred minimum I/O size which is the smallest request the device can perform without incurring a performance penalty. For disk drives this is often the physical block size. For RAID arrays it is often the stripe chunk size. A properly aligned multiple of minimum_io_size is the preferred request size for workloads where a high number of I/O operations is desired. What: /sys/block/<disk>/queue/optimal_io_size Date: April 2009 Contact: Martin K. Petersen <martin.petersen@oracle.com> Description: Storage devices may report an optimal I/O size, which is the device's preferred unit of receiving I/O. This is rarely reported for disk drives. For RAID devices it is usually the stripe width or the internal block size. the device's preferred unit for sustained I/O. This is rarely reported for disk drives. For RAID arrays it is usually the stripe width or the internal track size. A properly aligned multiple of optimal_io_size is the preferred request size for workloads where sustained throughput is desired. If no optimal I/O size is reported this file contains 0. Documentation/arm/memory.txt +2 −0 Original line number Diff line number Diff line Loading @@ -21,6 +21,8 @@ ffff8000 ffffffff copy_user_page / clear_user_page use. For SA11xx and Xscale, this is used to setup a minicache mapping. ffff4000 ffffffff cache aliasing on ARMv6 and later CPUs. ffff1000 ffff7fff Reserved. Platforms must not use this address range. Loading Documentation/block/data-integrity.txt +2 −2 Original line number Diff line number Diff line Loading @@ -50,7 +50,7 @@ encouraged them to allow separation of the data and integrity metadata scatter-gather lists. The controller will interleave the buffers on write and split them on read. This means that the Linux can DMA the data buffers to and from read. This means that Linux can DMA the data buffers to and from host memory without changes to the page cache. Also, the 16-bit CRC checksum mandated by both the SCSI and SATA specs Loading @@ -66,7 +66,7 @@ software RAID5). The IP checksum is weaker than the CRC in terms of detecting bit errors. However, the strength is really in the separation of the data buffers and the integrity metadata. These two distinct buffers much buffers and the integrity metadata. These two distinct buffers must match up for an I/O to complete. The separation of the data and integrity metadata buffers as well as Loading Loading
.gitignore +1 −0 Original line number Diff line number Diff line Loading @@ -27,6 +27,7 @@ *.gz *.lzma *.patch *.gcno # # Top-level generic files Loading
CREDITS +6 −0 Original line number Diff line number Diff line Loading @@ -2006,6 +2006,9 @@ E: paul@laufernet.com D: Soundblaster driver fixes, ISAPnP quirk S: California, USA N: Jonathan Layes D: ARPD support N: Tom Lees E: tom@lpsg.demon.co.uk W: http://www.lpsg.demon.co.uk/ Loading Loading @@ -3802,6 +3805,9 @@ S: van Bronckhorststraat 12 S: 2612 XV Delft S: The Netherlands N: Thomas Woller D: CS461x Cirrus Logic sound driver N: David Woodhouse E: dwmw2@infradead.org D: JFFS2 file system, Memory Technology Device subsystem, Loading
Documentation/ABI/testing/sysfs-block +23 −14 Original line number Diff line number Diff line Loading @@ -94,28 +94,37 @@ What: /sys/block/<disk>/queue/physical_block_size Date: May 2009 Contact: Martin K. Petersen <martin.petersen@oracle.com> Description: This is the smallest unit the storage device can write without resorting to read-modify-write operation. It is usually the same as the logical block size but may be bigger. One example is SATA drives with 4KB sectors that expose a 512-byte logical block size to the operating system. This is the smallest unit a physical storage device can write atomically. It is usually the same as the logical block size but may be bigger. One example is SATA drives with 4KB sectors that expose a 512-byte logical block size to the operating system. For stacked block devices the physical_block_size variable contains the maximum physical_block_size of the component devices. What: /sys/block/<disk>/queue/minimum_io_size Date: April 2009 Contact: Martin K. Petersen <martin.petersen@oracle.com> Description: Storage devices may report a preferred minimum I/O size, which is the smallest request the device can perform without incurring a read-modify-write penalty. For disk drives this is often the physical block size. For RAID arrays it is often the stripe chunk size. Storage devices may report a granularity or preferred minimum I/O size which is the smallest request the device can perform without incurring a performance penalty. For disk drives this is often the physical block size. For RAID arrays it is often the stripe chunk size. A properly aligned multiple of minimum_io_size is the preferred request size for workloads where a high number of I/O operations is desired. What: /sys/block/<disk>/queue/optimal_io_size Date: April 2009 Contact: Martin K. Petersen <martin.petersen@oracle.com> Description: Storage devices may report an optimal I/O size, which is the device's preferred unit of receiving I/O. This is rarely reported for disk drives. For RAID devices it is usually the stripe width or the internal block size. the device's preferred unit for sustained I/O. This is rarely reported for disk drives. For RAID arrays it is usually the stripe width or the internal track size. A properly aligned multiple of optimal_io_size is the preferred request size for workloads where sustained throughput is desired. If no optimal I/O size is reported this file contains 0.
Documentation/arm/memory.txt +2 −0 Original line number Diff line number Diff line Loading @@ -21,6 +21,8 @@ ffff8000 ffffffff copy_user_page / clear_user_page use. For SA11xx and Xscale, this is used to setup a minicache mapping. ffff4000 ffffffff cache aliasing on ARMv6 and later CPUs. ffff1000 ffff7fff Reserved. Platforms must not use this address range. Loading
Documentation/block/data-integrity.txt +2 −2 Original line number Diff line number Diff line Loading @@ -50,7 +50,7 @@ encouraged them to allow separation of the data and integrity metadata scatter-gather lists. The controller will interleave the buffers on write and split them on read. This means that the Linux can DMA the data buffers to and from read. This means that Linux can DMA the data buffers to and from host memory without changes to the page cache. Also, the 16-bit CRC checksum mandated by both the SCSI and SATA specs Loading @@ -66,7 +66,7 @@ software RAID5). The IP checksum is weaker than the CRC in terms of detecting bit errors. However, the strength is really in the separation of the data buffers and the integrity metadata. These two distinct buffers much buffers and the integrity metadata. These two distinct buffers must match up for an I/O to complete. The separation of the data and integrity metadata buffers as well as Loading
