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| Rev 772 | Rev 773 | ||
|---|---|---|---|
| Line 384... | Line 384... | ||
| 384 | 384 | ||
| 385 | /** |
385 | /** |
| 386 | * Assure that the current magazine is empty, return pointer to it, or NULL if |
386 | * Assure that the current magazine is empty, return pointer to it, or NULL if |
| 387 | * no empty magazine is available and cannot be allocated |
387 | * no empty magazine is available and cannot be allocated |
| 388 | * |
388 | * |
| - | 389 | * Assume mag_cache[CPU->id].lock is held |
|
| - | 390 | * |
|
| 389 | * We have 2 magazines bound to processor. |
391 | * We have 2 magazines bound to processor. |
| 390 | * First try the current. |
392 | * First try the current. |
| 391 | * If full, try the last. |
393 | * If full, try the last. |
| 392 | * If full, put to magazines list. |
394 | * If full, put to magazines list. |
| 393 | * allocate new, exchange last & current |
395 | * allocate new, exchange last & current |
| Line 418... | Line 420... | ||
| 418 | return NULL; |
420 | return NULL; |
| 419 | newmag->size = SLAB_MAG_SIZE; |
421 | newmag->size = SLAB_MAG_SIZE; |
| 420 | newmag->busy = 0; |
422 | newmag->busy = 0; |
| 421 | 423 | ||
| 422 | /* Flush last to magazine list */ |
424 | /* Flush last to magazine list */ |
| 423 | if (lastmag) |
425 | if (lastmag) { |
| - | 426 | spinlock_lock(&cache->lock); |
|
| 424 | list_prepend(&lastmag->link, &cache->magazines); |
427 | list_prepend(&lastmag->link, &cache->magazines); |
| - | 428 | spinlock_unlock(&cache->lock); |
|
| - | 429 | } |
|
| 425 | /* Move current as last, save new as current */ |
430 | /* Move current as last, save new as current */ |
| 426 | cache->mag_cache[CPU->id].last = cmag; |
431 | cache->mag_cache[CPU->id].last = cmag; |
| 427 | cache->mag_cache[CPU->id].current = newmag; |
432 | cache->mag_cache[CPU->id].current = newmag; |
| 428 | 433 | ||
| 429 | return newmag; |
434 | return newmag; |