search for: update_intpt

...et_intpte(*l3tab_ptr); _nl3e = l3e_get_intpte(nl3e); - _pl3e = cmpxchg((intpte_t *)l3tab_ptr, _ol3e, _nl3e); + _pl3e = cmpxchg(&l3e_get_intpte(*l3tab_ptr), _ol3e, _nl3e); BUG_ON(_pl3e != _ol3e); } @@ -1316,7 +1316,7 @@ static inline int update_intpte(intpte_t /* Macro that wraps the appropriate type-changes around update_intpte(). * Arguments are: type, ptr, old, new, mfn, vcpu */ #define UPDATE_ENTRY(_t,_p,_o,_n,_m,_v) \ - update_intpte((intpte_t *)(_p), \ + update_intpte(&...

While working on a database scaling problem using a SAP database test suite we discovered that these enterprise level large shared memory databases are very heavy users of mprotect(), to the extent that the performance overhead in current Xenolinux impacts scaling beyond a few cpus quite badly. A single cpu run under Xen has a nominal impact, but scaling out to 8 cpus results in a performance of

Hi Keir: These two patches remove the need for netloop by performing the copying in netback and only if it is necessary. The rationale is that most packets will be processed without delay allowing them to be freed without copying at all. So instead of copying every packet destined to dom0 we''ll only copy those that linger longer than a specified amount of time (currently 0.5s). As it