git: 99332926f6fc - main - amd64: also limit printings of EFIRT page faults

[Konstantin Belousov]

The branch main has been updated by kib:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=99332926f6fc6d1e4bb850a2b26744b948b14014

commit 99332926f6fc6d1e4bb850a2b26744b948b14014
Author:     Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2025-04-09 07:35:56 +0000
Commit:     Konstantin Belousov <k...@freebsd.org>
CommitDate: 2025-04-09 07:35:56 +0000

    amd64: also limit printings of EFIRT page faults
    
    Fixes:  fd748c7d5b7aefbeda604403f203637b12ae89df
    Sponsored by:   The FreeBSD Foundation
    PR:     285797
    MFC after:      1 week
---
 sys/amd64/amd64/trap.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/sys/amd64/amd64/trap.c b/sys/amd64/amd64/trap.c
index 1041422b9f92..a400b8a2c022 100644
--- a/sys/amd64/amd64/trap.c
+++ b/sys/amd64/amd64/trap.c
@@ -869,8 +869,13 @@ after_vmfault:
        if (td->td_intr_nesting_level == 0 &&
            curpcb->pcb_onfault != NULL) {
                if ((td->td_pflags & TDP_EFIRT) != 0) {
-                       trap_diag(frame, eva);
-                       printf("EFI RT page fault\n");
+                       u_long cnt = atomic_fetchadd_long(&cnt_efirt_faults, 1);
+
+                       if ((print_efirt_faults == 1 && cnt == 1) ||
+                           print_efirt_faults == 2) {
+                               trap_diag(frame, eva);
+                               printf("EFI RT page fault\n");
+                       }
                }
                frame->tf_rip = (long)curpcb->pcb_onfault;
                return (0);