diff options
Diffstat (limited to 'init/Kconfig')
| -rw-r--r-- | init/Kconfig | 211 |
1 files changed, 186 insertions, 25 deletions
diff --git a/init/Kconfig b/init/Kconfig index 6cfd71d0646..d07dcf9fc8a 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -27,6 +27,9 @@ config IRQ_WORK bool depends on HAVE_IRQ_WORK +config BUILDTIME_EXTABLE_SORT + bool + menu "General setup" config EXPERIMENTAL @@ -164,7 +167,7 @@ config KERNEL_BZIP2 depends on HAVE_KERNEL_BZIP2 help Its compression ratio and speed is intermediate. - Decompression speed is slowest among the three. The kernel + Decompression speed is slowest among the choices. The kernel size is about 10% smaller with bzip2, in comparison to gzip. Bzip2 uses a large amount of memory. For modern kernels you will need at least 8MB RAM or more for booting. @@ -173,10 +176,9 @@ config KERNEL_LZMA bool "LZMA" depends on HAVE_KERNEL_LZMA help - The most recent compression algorithm. - Its ratio is best, decompression speed is between the other - two. Compression is slowest. The kernel size is about 33% - smaller with LZMA in comparison to gzip. + This compression algorithm's ratio is best. Decompression speed + is between gzip and bzip2. Compression is slowest. + The kernel size is about 33% smaller with LZMA in comparison to gzip. config KERNEL_XZ bool "XZ" @@ -197,7 +199,7 @@ config KERNEL_LZO bool "LZO" depends on HAVE_KERNEL_LZO help - Its compression ratio is the poorest among the 4. The kernel + Its compression ratio is the poorest among the choices. The kernel size is about 10% bigger than gzip; however its speed (both compression and decompression) is the fastest. @@ -387,6 +389,7 @@ config AUDIT_LOGINUID_IMMUTABLE but may not be backwards compatible with older init systems. source "kernel/irq/Kconfig" +source "kernel/time/Kconfig" menu "RCU Subsystem" @@ -458,6 +461,33 @@ config RCU_FANOUT Select a specific number if testing RCU itself. Take the default if unsure. +config RCU_FANOUT_LEAF + int "Tree-based hierarchical RCU leaf-level fanout value" + range 2 RCU_FANOUT if 64BIT + range 2 RCU_FANOUT if !64BIT + depends on TREE_RCU || TREE_PREEMPT_RCU + default 16 + help + This option controls the leaf-level fanout of hierarchical + implementations of RCU, and allows trading off cache misses + against lock contention. Systems that synchronize their + scheduling-clock interrupts for energy-efficiency reasons will + want the default because the smaller leaf-level fanout keeps + lock contention levels acceptably low. Very large systems + (hundreds or thousands of CPUs) will instead want to set this + value to the maximum value possible in order to reduce the + number of cache misses incurred during RCU's grace-period + initialization. These systems tend to run CPU-bound, and thus + are not helped by synchronized interrupts, and thus tend to + skew them, which reduces lock contention enough that large + leaf-level fanouts work well. + + Select a specific number if testing RCU itself. + + Select the maximum permissible value for large systems. + + Take the default if unsure. + config RCU_FANOUT_EXACT bool "Disable tree-based hierarchical RCU auto-balancing" depends on TREE_RCU || TREE_PREEMPT_RCU @@ -515,10 +545,25 @@ config RCU_BOOST_PRIO depends on RCU_BOOST default 1 help - This option specifies the real-time priority to which preempted - RCU readers are to be boosted. If you are working with CPU-bound - real-time applications, you should specify a priority higher then - the highest-priority CPU-bound application. + This option specifies the real-time priority to which long-term + preempted RCU readers are to be boosted. If you are working + with a real-time application that has one or more CPU-bound + threads running at a real-time priority level, you should set + RCU_BOOST_PRIO to a priority higher then the highest-priority + real-time CPU-bound thread. The default RCU_BOOST_PRIO value + of 1 is appropriate in the common case, which is real-time + applications that do not have any CPU-bound threads. + + Some real-time applications might not have a single real-time + thread that saturates a given CPU, but instead might have + multiple real-time threads that, taken together, fully utilize + that CPU. In this case, you should set RCU_BOOST_PRIO to + a priority higher than the lowest-priority thread that is + conspiring to prevent the CPU from running any non-real-time + tasks. For example, if one thread at priority 10 and another + thread at priority 5 are between themselves fully consuming + the CPU time on a given CPU, then RCU_BOOST_PRIO should be + set to priority 6 or higher. Specify the real-time priority, or take the default if unsure. @@ -757,7 +802,7 @@ config RT_GROUP_SCHED endif #CGROUP_SCHED config BLK_CGROUP - tristate "Block IO controller" + bool "Block IO controller" depends on BLOCK default n ---help--- @@ -828,7 +873,10 @@ config IPC_NS config USER_NS bool "User namespace (EXPERIMENTAL)" depends on EXPERIMENTAL - default y + depends on UIDGID_CONVERTED + select UIDGID_STRICT_TYPE_CHECKS + + default n help This allows containers, i.e. vservers, to use user namespaces to provide different user info for different servers. @@ -852,6 +900,131 @@ config NET_NS endif # NAMESPACES +config UIDGID_CONVERTED + # True if all of the selected software conmponents are known + # to have uid_t and gid_t converted to kuid_t and kgid_t + # where appropriate and are otherwise safe to use with + # the user namespace. + bool + default y + + # List of kernel pieces that need user namespace work + # Features + depends on SYSVIPC = n + depends on IMA = n + depends on EVM = n + depends on KEYS = n + depends on AUDIT = n + depends on AUDITSYSCALL = n + depends on TASKSTATS = n + depends on TRACING = n + depends on FS_POSIX_ACL = n + depends on QUOTA = n + depends on QUOTACTL = n + depends on DEBUG_CREDENTIALS = n + depends on BSD_PROCESS_ACCT = n + depends on DRM = n + depends on PROC_EVENTS = n + + # Networking + depends on NET = n + depends on NET_9P = n + depends on IPX = n + depends on PHONET = n + depends on NET_CLS_FLOW = n + depends on NETFILTER_XT_MATCH_OWNER = n + depends on NETFILTER_XT_MATCH_RECENT = n + depends on NETFILTER_XT_TARGET_LOG = n + depends on NETFILTER_NETLINK_LOG = n + depends on INET = n + depends on IPV6 = n + depends on IP_SCTP = n + depends on AF_RXRPC = n + depends on LLC2 = n + depends on NET_KEY = n + depends on INET_DIAG = n + depends on DNS_RESOLVER = n + depends on AX25 = n + depends on ATALK = n + + # Filesystems + depends on USB_DEVICEFS = n + depends on USB_GADGETFS = n + depends on USB_FUNCTIONFS = n + depends on DEVTMPFS = n + depends on XENFS = n + + depends on 9P_FS = n + depends on ADFS_FS = n + depends on AFFS_FS = n + depends on AFS_FS = n + depends on AUTOFS4_FS = n + depends on BEFS_FS = n + depends on BFS_FS = n + depends on BTRFS_FS = n + depends on CEPH_FS = n + depends on CIFS = n + depends on CODA_FS = n + depends on CONFIGFS_FS = n + depends on CRAMFS = n + depends on DEBUG_FS = n + depends on ECRYPT_FS = n + depends on EFS_FS = n + depends on EXOFS_FS = n + depends on FAT_FS = n + depends on FUSE_FS = n + depends on GFS2_FS = n + depends on HFS_FS = n + depends on HFSPLUS_FS = n + depends on HPFS_FS = n + depends on HUGETLBFS = n + depends on ISO9660_FS = n + depends on JFFS2_FS = n + depends on JFS_FS = n + depends on LOGFS = n + depends on MINIX_FS = n + depends on NCP_FS = n + depends on NFSD = n + depends on NFS_FS = n + depends on NILFS2_FS = n + depends on NTFS_FS = n + depends on OCFS2_FS = n + depends on OMFS_FS = n + depends on QNX4FS_FS = n + depends on QNX6FS_FS = n + depends on REISERFS_FS = n + depends on SQUASHFS = n + depends on SYSV_FS = n + depends on UBIFS_FS = n + depends on UDF_FS = n + depends on UFS_FS = n + depends on VXFS_FS = n + depends on XFS_FS = n + + depends on !UML || HOSTFS = n + + # The rare drivers that won't build + depends on AIRO = n + depends on AIRO_CS = n + depends on TUN = n + depends on INFINIBAND_QIB = n + depends on BLK_DEV_LOOP = n + depends on ANDROID_BINDER_IPC = n + + # Security modules + depends on SECURITY_TOMOYO = n + depends on SECURITY_APPARMOR = n + +config UIDGID_STRICT_TYPE_CHECKS + bool "Require conversions between uid/gids and their internal representation" + depends on UIDGID_CONVERTED + default n + help + While the nececessary conversions are being added to all subsystems this option allows + the code to continue to build for unconverted subsystems. + + Say Y here if you want the strict type checking enabled + config SCHED_AUTOGROUP bool "Automatic process group scheduling" select EVENTFD @@ -1156,7 +1329,7 @@ menu "Kernel Performance Events And Counters" config PERF_EVENTS bool "Kernel performance events and counters" - default y if (PROFILING || PERF_COUNTERS) + default y if PROFILING depends on HAVE_PERF_EVENTS select ANON_INODES select IRQ_WORK @@ -1183,18 +1356,6 @@ config PERF_EVENTS Say Y if unsure. -config PERF_COUNTERS - bool "Kernel performance counters (old config option)" - depends on HAVE_PERF_EVENTS - help - This config has been obsoleted by the PERF_EVENTS - config option - please see that one for details. - - It has no effect on the kernel whether you enable - it or not, it is a compatibility placeholder. - - Say N if unsure. - config DEBUG_PERF_USE_VMALLOC default n bool "Debug: use vmalloc to back perf mmap() buffers" |