Linux operating system has been used when _ ldd3 has been used _ and does not allow attackers to compete

And handle the contention ( ※Please refer to the following link for more information: )
1) cause of birth
SMP has already been used when reading, and has been used when there are too many threads on the website. When there are too many concurrent connections during the same time, there are still too many concurrent connections.
Please refer to the following link for more information: too many requests.
When the number of records is reached, the number of records in the same region is reached.
When you cut the number of rows, the number of rows in the upper limit is reduced.
During the Non-same-period, there will be more than just one second.
Zookeeper
(In terms of quality, there are too many such problems, too many such problems .) the number of bytes required is too large .)

2) Policies
Zookeeper is usually used to manage zookeeper, Zookeeper is always running, and "zookeeper is always running.
Performance specification ,【Lockmeter] When there are too many temporary errors, please wait until the time is reached.
(1) when there are too many threads, there are too many threads.
Structure: struct semaphore
・
Void sema_init (struct semaphore * SEM, int Val );

Declare_mutex (name );
Declare_mutex_locked (name );

Void init_mutex (struct semaphore * SEM );
Void init_mutex_locked (struct semaphore * SEM );

Void down (struct semaphore * SEM );
Int down_interruptible (struct semaphore * SEM );
Int down_trylock (struct semaphore * SEM );

Void up (struct semaphore * SEM );
② Reader/writer internal external entity
Structure: struct rw_semaphore
・
Void init_rwsem (struct rw_semaphore * SEM );

Void down_read (struct rw_semaphore * SEM );
Int down_read_trylock (struct rw_semaphore * SEM );
Void up_read (struct rw_semaphore * SEM );

Void down_write (struct rw_semaphore * SEM );
Int down_write_trylock (struct rw_semaphore * SEM );
Void up_write (struct rw_semaphore * SEM );
Void downgrade_write (struct rw_semaphore * SEM );
③ Completion
Completion failed, too many pending errors please do not have too many pending errors, too many pending errors have been completed, and too many pending errors have been notified.
Structure: struct completion
・
Declare_completion (my_completion );
Init_completion (& my_completion );
Init_completion (struct completion C );

Void wait_for_completion (struct completion * C );

Void complete (struct completion * C );
Void complete_all (struct completion * C); // completion has been completed successfully when there are already been completed, completion_all has been completed successfully when there are already been completed successfully.
Void complete_and_exit (struct completion * C, long retval); // completion wait for completion.
④ Too many others
Please refer to the following link for more information: then, make sure that your website has been created.
Performance was too high.
There are two types of data such as artificial intelligence, artificial intelligence, and artificial intelligence.
Structure:
・
Spinlock_t my_lock = spin_lock_unlocked;
Void spin_lock_init (spinlock_t * Lock );

Void spin_lock (spinlock_t * Lock );
Void spin_unlock (spinlock_t * Lock );

Void read_lock (rwlock_t * Lock );
Void read_unlock (rwlock_t * Lock );

Void write_lock (rwlock_t * Lock );
Void write_unlock (rwlock_t * Lock );
Zookeeper.
Too many original principles
During peak hours,
1. zookeeper has been released.
2. Cut the number of rows that are not allowed.
3. The minimum time limit for creating temporary instances is limited.
★⑤ ロック わる Method
When the dynamic route for communications between dynamic route for CDN and dynamic route for CDN, the number of dynamic route for CDN domains is reduced.
On behalf of Alibaba Cloud, there are two possible reasons.
Please refer to the following example for more information. <Inux/kfifo. h>)
Returns the number of rows between two integers (atomic_t. I have limited the quota of zookeeper, 24 hours during peak hours, when the peak hours were reached, the peak hours were reached. . <ASM/Atomic. h>)
Void atomic_set (atomic_t * V, int I );
Int atomic_read (atomic_t * V );
Void atomic_add (int I, atomic_t * V );
Void atomic_inc (atomic_t * V );
Void atomic_dec (atomic_t * V );
Zookeeper.
Zookeeper has been operating on zookeeper. <ASM/bitops. h>
Void set_bit (NR, void * ADDR );
Void clear_bit (NR, void * ADDR );
Void change_bit (NR, void * ADDR );
Zookeeper.
Eclipseqlock (<Linux/seqlock. h>)
Linux2.6 からは,, ロクなし seseseseseseseseseseseseseqlock ま se too many requests.
Seqlock always protects against malicious attacks. the primary node requires that the primary node and the primary node use the primary node.
Seqlock and zookeeper include zookeeper and zookeeper components to ensure the security of zookeeper.
Seqlock_t
Worker count:
Unsigned int read_seqbegin_irqsave (seqlock_t * Lock, unsigned long flags );
Int read_seqretry_irqrestore (seqlock_t * Lock, unsigned int seq, unsigned long flags );
Void write_seqlock (seqlock_t * Lock );
Void write_sequnlock (seqlock_t * Lock );
Zookeeper.