Re: kern/60522: evbppc/RB800 hits MI pmap KASSERT failure

["Rin Okuyama via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR kern/60522; it has been noted by GNATS.

From: Rin Okuyama <rokuyama.rk%gmail.com@localhost>
To: Nick Hudson <nick.hudson%gmx.co.uk@localhost>, gnats-bugs%netbsd.org@localhost,
 kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/60522: evbppc/RB800 hits MI pmap KASSERT failure
Date: Sat, 1 Aug 2026 23:44:08 +0900

 Hi,
 
 On 2026/08/01 21:42, Nick Hudson wrote:
 > Is this a regression? If so can you bisect please
 
 Sure. The first bad commit was:
 
 https://github.com/NetBSD/src/commit/6162b83d2b80429d87007f1f1c451e538e577581
 
 KASSERT failure disappears if part of this commit is reverted:
 
 ```
 diff --git a/sys/uvm/pmap/pmap.c b/sys/uvm/pmap/pmap.c
 index cb0f6b3b065..eba0cbba4c7 100644
 --- a/sys/uvm/pmap/pmap.c
 +++ b/sys/uvm/pmap/pmap.c
 @@ -1326,7 +1326,7 @@ pmap_pte_protect(pmap_t pmap, vaddr_t sva, vaddr_t 
 eva, pt_entry_t *ptep,
   			struct vm_page_md * const mdpg = VM_PAGE_TO_MD(pg);
 
   			pmap_page_set_attributes(mdpg, VM_PAGEMD_MODIFIED);
 -			if (VM_PAGEMD_EXECPAGE_P(mdpg) || (prot & VM_PROT_EXECUTE)) {
 +			if (VM_PAGEMD_EXECPAGE_P(mdpg)) {
   				KASSERT(!VM_PAGEMD_PVLIST_EMPTY_P(mdpg));
   #ifdef PMAP_VIRTUAL_CACHE_ALIASES
   				if (VM_PAGEMD_CACHED_P(mdpg)) {
 ```
 
 Thanks,
 rin
 
 > 
 > Otherwise, please enable UVMHIST and dump pmaphist and pmapexechist after the panic.
 > 
 >