git: bfa9a16569ba - stable/13 - vnode_pager_generic_putpages(): correctly handle clean block at EOF

The branch stable/13 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=bfa9a16569bab5240a6fdebcd407fd143d0d5ac4

commit bfa9a16569bab5240a6fdebcd407fd143d0d5ac4
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2024-01-08 13:21:06 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2024-01-18 01:02:52 +0000

    vnode_pager_generic_putpages(): correctly handle clean block at EOF
    
    PR:     276191
    
    (cherry picked from commit bdb46c21a3e68d4395d6e0b6a205187e655532b0)
---
 sys/vm/vnode_pager.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/vm/vnode_pager.c b/sys/vm/vnode_pager.c
index 7fe0a91b8cf5..79de90dca6a8 100644
--- a/sys/vm/vnode_pager.c
+++ b/sys/vm/vnode_pager.c
@@ -1394,12 +1394,13 @@ vnode_pager_generic_putpages(struct vnode *vp, vm_page_t *ma, int bytecount,
 start_write:
 		if (next_offset > poffset + maxsize)
 			next_offset = poffset + maxsize;
+		if (prev_offset == next_offset)
+			goto write_done;
 
 		/*
 		 * Getting here requires finding a dirty block in the
 		 * 'skip clean blocks' loop.
 		 */
-		MPASS(prev_offset < next_offset);
 
 		aiov.iov_base = NULL;
 		auio.uio_iovcnt = 1;