vm_fault_busy_sleep(): update comment after addition of allocflags arg

Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D52538

This commit is contained in:

Konstantin Belousov

2025-09-15 03:52:47 +03:00

parent 081f0e38e3

commit f1b656f144

1 changed files with 4 additions and 5 deletions

									
										sys/vm/vm_fault.c
									
		+4
		-5
	
												View File
												
				@@ -1456,11 +1456,10 @@ 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)