config BTRFS_FS tristate "Btrfs filesystem support" select CRYPTO select CRYPTO_CRC32C select ZLIB_INFLATE select ZLIB_DEFLATE select LZO_COMPRESS select LZO_DECOMPRESS select RAID6_PQ select XOR_BLOCKS select SRCU help Btrfs is a general purpose copy-on-write filesystem with extents, writable snapshotting, support for multiple devices and many more features focused on fault tolerance, repair and easy administration. The filesystem disk format is no longer unstable, and it's not expected to change unless there are strong reasons to do so. If there is a format change, file systems with a unchanged format will continue to be mountable and usable by newer kernels. For more information, please see the web pages at http://btrfs.wiki.kernel.org. To compile this file system support as a module, choose M here. The module will be called btrfs. If unsure, say N. config BTRFS_FS_POSIX_ACL bool "Btrfs POSIX Access Control Lists" depends on BTRFS_FS select FS_POSIX_ACL help POSIX Access Control Lists (ACLs) support permissions for users and groups beyond the owner/group/world scheme. To learn more about Access Control Lists, visit the POSIX ACLs for Linux website . If you don't know what Access Control Lists are, say N config BTRFS_FS_CHECK_INTEGRITY bool "Btrfs with integrity check tool compiled in (DANGEROUS)" depends on BTRFS_FS help Adds code that examines all block write requests (including writes of the super block). The goal is to verify that the state of the filesystem on disk is always consistent, i.e., after a power-loss or kernel panic event the filesystem is in a consistent state. If the integrity check tool is included and activated in the mount options, plenty of kernel memory is used, and plenty of additional CPU cycles are spent. Enabling this functionality is not intended for normal use. In most cases, unless you are a btrfs developer who needs to verify the integrity of (super)-block write requests during the run of a regression test, say N config BTRFS_FS_RUN_SANITY_TESTS bool "Btrfs will run sanity tests upon loading" depends on BTRFS_FS help This will run some basic sanity tests on the free space cache code to make sure it is acting as it should. These are mostly regression tests and are only really interesting to btrfs developers. If unsure, say N. config BTRFS_DEBUG bool "Btrfs debugging support" depends on BTRFS_FS help Enable run-time debugging support for the btrfs filesystem. This may enable additional and expensive checks with negative impact on performance, or export extra information via sysfs. If unsure, say N. config BTRFS_ASSERT bool "Btrfs assert support" depends on BTRFS_FS help Enable run-time assertion checking. This will result in panics if any of the assertions trip. This is meant for btrfs developers only. If unsure, say N. net-next.git/log/net?h=nds-private-remove&id=cb9c68363efb6d1f950ec55fb06e031ee70db5fc'>net/appletalk/ddp.c

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