On 3/29/24 23:58, Michael Roth wrote:
+ if (rmp_level == PG_LEVEL_4K) {
+ pr_debug_ratelimited("%s: Spurious RMP fault for GPA 0x%llx, error_code 0x%llx",
+ __func__, gpa, error_code);
+ goto out;
+ }
+
+ pr_debug_ratelimited("%s: Splitting 2M RMP entry for GPA 0x%llx, error_code 0x%llx",
+ __func__, gpa, error_code);
+ ret = snp_rmptable_psmash(pfn);
+ if (ret && ret != PSMASH_FAIL_INUSE) {
+ /*
+ * Look it up again. If it's 4K now then the PSMASH may have raced with
+ * another process and the issue has already resolved itself.
+ */
+ if (!snp_lookup_rmpentry(pfn, &assigned, &rmp_level) && assigned &&
+ rmp_level == PG_LEVEL_4K) {
+ pr_debug_ratelimited("%s: PSMASH for GPA 0x%llx failed with ret %d due to potential race",
+ __func__, gpa, ret);
+ goto out;
+ }
Please change these pr_debug_ratelimited() to just a single trace point
after the call to snp_rmptable_psmash().
Paolo
