On 12/01/21 19:10, Ben Gardon wrote:
+ * May be acquired under the MMU lock in read mode or non-overlapping
+ * with the MMU lock.
+ */
+ spinlock_t tdp_mmu_pages_lock;
Is this correct? My understanding is that:
- you can take tdp_mmu_pages_lock from a shared MMU lock critical section
- you don't need to take tdp_mmu_pages_lock from an exclusive MMU lock
critical section, because you can't be concurrent with a shared critical
section
- but then, you can't take tdp_mmu_pages_lock outside the MMU lock,
because you could have
write_lock(mmu_lock)
spin_lock(tdp_mmu_pages_lock)
do tdp_mmu_pages_lock stuff !!! do tdp_mmu_pages_lock stuff
write_unlock(mmu_lock)
spin_unlock(tdp_mmu_pages_lock)
Paolo
