Olivier Houchard 899fb8abdc MINOR: memory: Change the flush_lock to a spinlock, and don't get it in alloc. ... The flush_lock was introduced, mostly to be sure that pool_gc() will never dereference a pointer that has been free'd. __pool_get_first() was acquiring the lock to, the fear was that otherwise that pointer could get free'd later, and then pool_gc() would attempt to dereference it. However, that can not happen, because the only functions that can free a pointer, when using lockless pools, are pool_gc() and pool_flush(), and as long as those two are mutually exclusive, nobody will be able to free the pointer while pool_gc() attempts to access it. So change the flush_lock to a spinlock, and don't bother acquire/release it in __pool_get_first(), that way callers of __pool_get_first() won't have to wait while the pool is flushed. The worst that can happen is we call __pool_refill_alloc() while the pool is getting flushed, and memory can get allocated just to be free'd. This may help with github issue #552 This may be backported to 2.1, 2.0 and 1.9.		2020-03-18 15:55:35 +01:00
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common	MINOR: memory: Change the flush_lock to a spinlock, and don't get it in alloc.	2020-03-18 15:55:35 +01:00
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proto	MEDIUM: fd: Introduce a running mask, and use it instead of the spinlock.	2020-03-17 15:30:07 +01:00
types	MINOR: wdt: Move the definitions of WDTSIG and DEBUGSIG into types/signal.h.	2020-03-18 13:07:19 +01:00