x86, fpu: lazy allocation of FPU area - v5
Only allocate the FPU area when the application actually uses FPU, i.e., in the first lazy FPU trap. This could save memory for non-fpu using apps. for example: on my system after boot, there are around 300 processes, with only 17 using FPU. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
parent
61c4628b53
commit
aa283f4927
8 changed files with 91 additions and 23 deletions
|
@ -366,6 +366,8 @@ DECLARE_PER_CPU(struct orig_ist, orig_ist);
|
|||
|
||||
extern void print_cpu_info(struct cpuinfo_x86 *);
|
||||
extern unsigned int xstate_size;
|
||||
extern void free_thread_xstate(struct task_struct *);
|
||||
extern struct kmem_cache *task_xstate_cachep;
|
||||
extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
|
||||
extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
|
||||
extern unsigned short num_cache_leaves;
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue