The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
kzalloc_node – allocate zeroed memory from a particular memory node. Synopsis void *kzalloc_node(size_t size, gfp_t flags, int node); Arguments size how many bytes of memory are required. flags the type of memory to allocate (see kmalloc). node memory node from which to allocate Copyright
kzalloc – allocate memory. The memory is set to zero. Synopsis void *kzalloc(size_t size, gfp_t flags); Arguments size how many bytes of memory are required. flags the type of memory to allocate (see kmalloc). Copyright
kstrtoull – convert a string to an unsigned long long Synopsis int kstrtoull(const char *s, unsigned int base, unsigned long long *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign, but…
kstrtoul – convert a string to an unsigned long Synopsis int kstrtoul(const char *s, unsigned int base, unsigned long *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign, but not a…
kstrtouint – convert a string to an unsigned int Synopsis int kstrtouint(const char *s, unsigned int base, unsigned int *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign, but not a…
kstrtoll – convert a string to a long long Synopsis int kstrtoll(const char *s, unsigned int base, long long *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign or a minus…
kstrtol – convert a string to a long Synopsis int kstrtol(const char *s, unsigned int base, long *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign or a minus sign. base…
kstrtoint – convert a string to an int Synopsis int kstrtoint(const char *s, unsigned int base, int *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign or a minus sign. base…
kstrtobool – convert common user inputs into boolean values Synopsis int kstrtobool(const char *s, bool *res); Arguments s input string res result Description This routine returns 0 iff the first character is one of ‘Yy1Nn0’, or [oO][NnFf] for “on” and “off”. Otherwise it will return -EINVAL. Value pointed to by res is updated upon finding…
kstrndup – allocate space for and copy an existing string Synopsis char *kstrndup(const char *s, size_t max, gfp_t gfp); Arguments s the string to duplicate max read at most max chars from s gfp the GFP mask used in the kmalloc call when allocating memory Copyright
kstrdup_const – conditionally duplicate an existing const string Synopsis const char *kstrdup_const(const char *s, gfp_t gfp); Arguments s the string to duplicate gfp the GFP mask used in the kmalloc call when allocating memory Description Function returns source string if it is in .rodata section otherwise it fallbacks to kstrdup. Strings allocated by kstrdup_const should…
kstrdup – allocate space for and copy an existing string Synopsis char *kstrdup(const char *s, gfp_t gfp); Arguments s the string to duplicate gfp the GFP mask used in the kmalloc call when allocating memory Copyright
kstat_irqs_usr – Get the statistics for an interrupt Synopsis unsigned int kstat_irqs_usr(unsigned int irq); Arguments irq The interrupt number Description Returns the sum of interrupt counts on all cpus since boot for irq. Contrary to kstat_irqs this can be called from any preemptible context. It’s protected against concurrent removal of an interrupt descriptor when sparse…
kstat_irqs_cpu – Get the statistics for an interrupt on a cpu Synopsis unsigned int kstat_irqs_cpu(unsigned int irq, int cpu); Arguments irq The interrupt number cpu The cpu number Description Returns the sum of interrupt counts on cpu since boot for irq. The caller must ensure that the interrupt is not removed concurrently. Authors Thomas Gleixner…
kstat_irqs – Get the statistics for an interrupt Synopsis unsigned int kstat_irqs(unsigned int irq); Arguments irq The interrupt number Description Returns the sum of interrupt counts on all cpus since boot for irq. The caller must ensure that the interrupt is not removed concurrently. Authors Thomas Gleixner <tglx [at] linutronix.de> Author. Ingo Molnar <mingo [at]…
ksize – get the actual amount of memory allocated for a given object Synopsis size_t ksize(const void *objp); Arguments objp Pointer to the object Description kmalloc may internally round up allocations and return more memory than requested. ksize can be used to determine the actual amount of memory allocated. The caller may use this additional…
kmemdup – duplicate region of memory Synopsis void *kmemdup(const void *src, size_t len, gfp_t gfp); Arguments src memory region to duplicate len memory region length gfp GFP mask to use Copyright
kmem_cache_free – Deallocate an object Synopsis void kmem_cache_free(struct kmem_cache *cachep, void *objp); Arguments cachep The cache the allocation was from. objp The previously allocated object. Description Free an object which was previously allocated from this cache. Copyright
kmem_cache_alloc_node – Allocate an object on the specified node Synopsis void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid); Arguments cachep The cache to allocate from. flags See kmalloc. nodeid node number of the target node. Description Identical to kmem_cache_alloc but it will allocate memory on the given node, which can improve the performance for cpu…
kmem_cache_alloc – Allocate an object Synopsis void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags); Arguments cachep The cache to allocate from. flags See kmalloc. Description Allocate an object from this cache. The flags are only relevant if the cache has no available objects. Copyright