/* * Tell us whether a given allocation should use the local alloc * file. Otherwise, it has to go to the main bitmap. * * This function does semi-dirty reads of local alloc size and state! * This is ok however, as the values are re-checked once under mutex. */ int ocfs2_alloc_should_use_local(struct ocfs2_super *osb, u64 bits) { int ret = 0; int la_bits; spin_lock(&osb->osb_lock); la_bits = osb->local_alloc_bits; if (!ocfs2_la_state_enabled(osb)) goto bail; /* la_bits should be at least twice the size (in clusters) of * a new block group. We want to be sure block group * allocations go through the local alloc, so allow an * allocation to take up to half the bitmap. */ if (bits > (la_bits / 2)) goto bail; ret = 1; bail: trace_ocfs2_alloc_should_use_local( (unsigned long long)bits, osb->local_alloc_state, la_bits, ret); spin_unlock(&osb->osb_lock); return ret; }
int ocfs2_alloc_should_use_local(struct ocfs2_super *osb, u64 bits) { int ret = 0; int la_bits; spin_lock(&osb->osb_lock); la_bits = osb->local_alloc_bits; if (!ocfs2_la_state_enabled(osb)) goto bail; /* */ if (bits > (la_bits / 2)) goto bail; ret = 1; bail: trace_ocfs2_alloc_should_use_local( (unsigned long long)bits, osb->local_alloc_state, la_bits, ret); spin_unlock(&osb->osb_lock); return ret; }