quarantine_reduce

Name:quarantine_reduce

Proto:void quarantine_reduce(void)

Type:void

Parameter:Nothing

218

to_free = QLIST_INIT

220

If Value is more likely to compile time(READ_ONCE(Total size of all objects in global_quarantine across all batches. ) <= READ_ONCE(Maximum size of the global queue. )) Then Return

233

srcu_idx = srcu_read_lock - register a new reader for an SRCU-protected structure

234

raw_spin_lock_irqsave( & quarantine_lock, flags)

240

total_size = (totalram_pages() << PAGE_SHIFT determines the page size ) / The fraction of physical memory the quarantine is allowed to occupy.* Quarantine doesn't support memory shrinker with SLAB allocator, so we keep* the ratio low to avoid OOM.

242

percpu_quarantines = QUARANTINE_PERCPU_SIZE * num_online_cpus()

243

new_quarantine_size = If total_size < percpu_quarantines Then 0 Else total_size - percpu_quarantines

245

WRITE_ONCE(Maximum size of the global queue. , new_quarantine_size)

247

WRITE_ONCE(Target size of a batch in global_quarantine.* Usually equal to QUARANTINE_PERCPU_SIZE unless we have too much RAM., max - return maximum of two values of the same or compatible types*@x: first value*@y: second value((size_t)QUARANTINE_PERCPU_SIZE, 2 * total_size / QUARANTINE_BATCHES))

250

If Value is more likely to compile time(Total size of all objects in global_quarantine across all batches. > Maximum size of the global queue. ) Then

251

qlist_move_all( & Round-robin FIFO array of batches. [quarantine_head], & to_free)

252

WRITE_ONCE(Total size of all objects in global_quarantine across all batches. , Total size of all objects in global_quarantine across all batches. - bytes)

253

quarantine_head++

254

If quarantine_head == QUARANTINE_BATCHES Then quarantine_head = 0

258

raw_spin_unlock_irqrestore( & quarantine_lock, flags)

260

qlist_free_all( & to_free, NULL)

261

srcu_read_unlock - unregister a old reader from an SRCU-protected structure.*@ssp: srcu_struct in which to unregister the old reader.*@idx: return value from corresponding srcu_read_lock().* Exit an SRCU read-side critical section.

**Caller**
Name	Describe
kasan_kmalloc_large

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion