to directly read from or write to another process' address space.
See the man page for more details.
-config FHANDLE
- bool "open by fhandle syscalls" if EXPERT
- select EXPORTFS
- default y
- help
- If you say Y here, a user level program will be able to map
- file names to handle and then later use the handle for
- different file system operations. This is useful in implementing
- userspace file servers, which now track files using handles instead
- of names. The handle would remain the same even if file names
- get renamed. Enables open_by_handle_at(2) and name_to_handle_at(2)
- syscalls.
-
config USELIB
bool "uselib syscall"
def_bool ALPHA || M68K || SPARC || X86_32 || IA32_EMULATION
endif # CGROUPS
-config CHECKPOINT_RESTORE
- bool "Checkpoint/restore support" if EXPERT
- select PROC_CHILDREN
- default n
- help
- Enables additional kernel features in a sake of checkpoint/restore.
- In particular it adds auxiliary prctl codes to setup process text,
- data and heap segment sizes, and a few additional /proc filesystem
- entries.
-
- If unsure, say N here.
-
menuconfig NAMESPACES
bool "Namespaces support" if EXPERT
depends on MULTIUSER
If unsure say N here.
+config FHANDLE
+ bool "open by fhandle syscalls" if EXPERT
+ select EXPORTFS
+ default y
+ help
+ If you say Y here, a user level program will be able to map
+ file names to handle and then later use the handle for
+ different file system operations. This is useful in implementing
+ userspace file servers, which now track files using handles instead
+ of names. The handle would remain the same even if file names
+ get renamed. Enables open_by_handle_at(2) and name_to_handle_at(2)
+ syscalls.
+
config POSIX_TIMERS
bool "Posix Clocks & timers" if EXPERT
default y
If unsure say y.
-config KALLSYMS
- bool "Load all symbols for debugging/ksymoops" if EXPERT
- default y
- help
- Say Y here to let the kernel print out symbolic crash information and
- symbolic stack backtraces. This increases the size of the kernel
- somewhat, as all symbols have to be loaded into the kernel image.
-
-config KALLSYMS_ALL
- bool "Include all symbols in kallsyms"
- depends on DEBUG_KERNEL && KALLSYMS
- help
- Normally kallsyms only contains the symbols of functions for nicer
- OOPS messages and backtraces (i.e., symbols from the text and inittext
- sections). This is sufficient for most cases. And only in very rare
- cases (e.g., when a debugger is used) all symbols are required (e.g.,
- names of variables from the data sections, etc).
-
- This option makes sure that all symbols are loaded into the kernel
- image (i.e., symbols from all sections) in cost of increased kernel
- size (depending on the kernel configuration, it may be 300KiB or
- something like this).
-
- Say N unless you really need all symbols.
-
-config KALLSYMS_ABSOLUTE_PERCPU
- bool
- depends on KALLSYMS
- default X86_64 && SMP
-
-config KALLSYMS_BASE_RELATIVE
- bool
- depends on KALLSYMS
- default !IA64 && !(TILE && 64BIT)
- help
- Instead of emitting them as absolute values in the native word size,
- emit the symbol references in the kallsyms table as 32-bit entries,
- each containing a relative value in the range [base, base + U32_MAX]
- or, when KALLSYMS_ABSOLUTE_PERCPU is in effect, each containing either
- an absolute value in the range [0, S32_MAX] or a relative value in the
- range [base, base + S32_MAX], where base is the lowest relative symbol
- address encountered in the image.
-
- On 64-bit builds, this reduces the size of the address table by 50%,
- but more importantly, it results in entries whose values are build
- time constants, and no relocation pass is required at runtime to fix
- up the entries based on the runtime load address of the kernel.
-
config PRINTK
default y
bool "Enable support for printk" if EXPERT
If unsure, say Y.
-# syscall, maps, verifier
-config BPF_SYSCALL
- bool "Enable bpf() system call"
- select ANON_INODES
- select BPF
- default n
- help
- Enable the bpf() system call that allows to manipulate eBPF
- programs and maps via file descriptors.
-
config SHMEM
bool "Use full shmem filesystem" if EXPERT
default y
applications use these syscalls, you can disable this option to save
space.
-config USERFAULTFD
- bool "Enable userfaultfd() system call"
- select ANON_INODES
- depends on MMU
- help
- Enable the userfaultfd() system call that allows to intercept and
- handle page faults in userland.
-
config MEMBARRIER
bool "Enable membarrier() system call" if EXPERT
default y
If unsure, say Y.
+config CHECKPOINT_RESTORE
+ bool "Checkpoint/restore support" if EXPERT
+ select PROC_CHILDREN
+ default n
+ help
+ Enables additional kernel features in a sake of checkpoint/restore.
+ In particular it adds auxiliary prctl codes to setup process text,
+ data and heap segment sizes, and a few additional /proc filesystem
+ entries.
+
+ If unsure, say N here.
+
+config KALLSYMS
+ bool "Load all symbols for debugging/ksymoops" if EXPERT
+ default y
+ help
+ Say Y here to let the kernel print out symbolic crash information and
+ symbolic stack backtraces. This increases the size of the kernel
+ somewhat, as all symbols have to be loaded into the kernel image.
+
+config KALLSYMS_ALL
+ bool "Include all symbols in kallsyms"
+ depends on DEBUG_KERNEL && KALLSYMS
+ help
+ Normally kallsyms only contains the symbols of functions for nicer
+ OOPS messages and backtraces (i.e., symbols from the text and inittext
+ sections). This is sufficient for most cases. And only in very rare
+ cases (e.g., when a debugger is used) all symbols are required (e.g.,
+ names of variables from the data sections, etc).
+
+ This option makes sure that all symbols are loaded into the kernel
+ image (i.e., symbols from all sections) in cost of increased kernel
+ size (depending on the kernel configuration, it may be 300KiB or
+ something like this).
+
+ Say N unless you really need all symbols.
+
+config KALLSYMS_ABSOLUTE_PERCPU
+ bool
+ depends on KALLSYMS
+ default X86_64 && SMP
+
+config KALLSYMS_BASE_RELATIVE
+ bool
+ depends on KALLSYMS
+ default !IA64 && !(TILE && 64BIT)
+ help
+ Instead of emitting them as absolute values in the native word size,
+ emit the symbol references in the kallsyms table as 32-bit entries,
+ each containing a relative value in the range [base, base + U32_MAX]
+ or, when KALLSYMS_ABSOLUTE_PERCPU is in effect, each containing either
+ an absolute value in the range [0, S32_MAX] or a relative value in the
+ range [base, base + S32_MAX], where base is the lowest relative symbol
+ address encountered in the image.
+
+ On 64-bit builds, this reduces the size of the address table by 50%,
+ but more importantly, it results in entries whose values are build
+ time constants, and no relocation pass is required at runtime to fix
+ up the entries based on the runtime load address of the kernel.
+
+# end of the "standard kernel features (expert users)" menu
+
+# syscall, maps, verifier
+config BPF_SYSCALL
+ bool "Enable bpf() system call"
+ select ANON_INODES
+ select BPF
+ default n
+ help
+ Enable the bpf() system call that allows to manipulate eBPF
+ programs and maps via file descriptors.
+
+config USERFAULTFD
+ bool "Enable userfaultfd() system call"
+ select ANON_INODES
+ depends on MMU
+ help
+ Enable the userfaultfd() system call that allows to intercept and
+ handle page faults in userland.
+
config EMBEDDED
bool "Embedded system"
option allnoconfig_y
projects / kernel.git / commitdiff