git: 6506630a28bc - stable/15 - vm_fault_busy_sleep(): update comment after addition of allocflags arg

The branch stable/15 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=6506630a28bcf79e6c6e9cbb573a1b1e165c800f

commit 6506630a28bcf79e6c6e9cbb573a1b1e165c800f
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2025-09-15 00:52:47 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2025-10-11 05:08:13 +0000

    vm_fault_busy_sleep(): update comment after addition of allocflags arg
    
    (cherry picked from commit f1b656f14464c2e3ec4ab2eeade3b00dce4bd459)
---
 sys/vm/vm_fault.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/sys/vm/vm_fault.c b/sys/vm/vm_fault.c
index dfd711ca93ea..2e150b368d71 100644
--- a/sys/vm/vm_fault.c
+++ b/sys/vm/vm_fault.c
@@ -1453,11 +1453,10 @@ vm_fault_getpages(struct faultstate *fs, int *behindp, int *aheadp)
  * and we could end up trying to pagein and pageout the same page
  * simultaneously.
  *
- * We can theoretically allow the busy case on a read fault if the page
- * is marked valid, but since such pages are typically already pmap'd,
- * putting that special case in might be more effort then it is worth.
- * We cannot under any circumstances mess around with a shared busied
- * page except, perhaps, to pmap it.
+ * We allow the busy case on a read fault if the page is valid.  We
+ * cannot under any circumstances mess around with a shared busied
+ * page except, perhaps, to pmap it.  This is controlled by the
+ * VM_ALLOC_SBUSY bit in the allocflags argument.
  */
 static void
 vm_fault_busy_sleep(struct faultstate *fs, int allocflags)