/*
* pmem_deep_persist -- perform deep persist on a memory range
*
* It merely acts as wrapper around an msync call in most cases, the only
* exception is the case of an mmap'ed DAX device on Linux.
*/
int
pmem_deep_persist(const void *addr, size_t len)
{
LOG(3, "addr %p len %zu", addr, len);
pmem_deep_flush(addr, len);
return pmem_deep_drain(addr, len);
}
/*
* os_part_deep_common -- common function to handle both
* deep_persist and deep_drain part flush cases.
*/
int
os_part_deep_common(struct pool_replica *rep, unsigned partidx, void *addr,
size_t len, int flush)
{
LOG(3, "part %p part %d addr %p len %lu flush %d",
rep, partidx, addr, len, flush);
if (!rep->is_pmem) {
/*
* In case of part on non-pmem call msync on the range
* to deep flush the data. Deep drain is empty as all
* data is msynced to persistence.
*/
if (!flush)
return 0;
if (pmem_msync(addr, len)) {
LOG(1, "pmem_msync(%p, %lu)", addr, len);
return -1;
}
return 0;
}
/* Call deep flush if it was requested */
if (flush) {
LOG(15, "pmem_deep_flush addr %p, len %lu", addr, len);
pmem_deep_flush(addr, len);
}
/*
* Before deep drain call normal drain to ensure that data
* is at least in WPQ.
*/
pmem_drain();
/*
* For deep_drain on normal pmem it is enough to
* call msync on one page.
*/
if (pmem_msync(addr, MIN(Pagesize, len))) {
LOG(1, "pmem_msync(%p, %lu)", addr, len);
return -1;
}
return 0;
}
