diff --git a/Documentation/filesystems/ceph.rst b/Documentation/filesystems/ceph.rst
index 6d2276a87a5a..ee2ca0c0c654 100644
--- a/Documentation/filesystems/ceph.rst
+++ b/Documentation/filesystems/ceph.rst
@@ -194,6 +194,12 @@ Mount Options
         copies.  Currently, it's only used in copy_file_range, which will revert
         to the default VFS implementation if this option is used.
 
+  nearfull_sync
+	Force written data to stable storage when the cluster or file data pool is
+	marked NEARFULL. This restores the legacy client-side backpressure
+	behavior. By default, CephFS writes are not forced synchronous solely
+	because of NEARFULL.
+
   recover_session=<no|clean>
 	Set auto reconnect mode in the case where the client is blocklisted. The
 	available modes are "no" and "clean". The default is "no".
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index a0b9c2b5a583..bd3e3f5c269e 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -2388,7 +2388,8 @@ static ssize_t ceph_splice_read(struct file *in, loff_t *ppos,
  * dropping our cap refs and allowing the pending snap to logically
  * complete _before_ this write occurs.
  *
- * If we are near ENOSPC, write synchronously.
+ * If requested, nearfull writes are synced to preserve the legacy
+ * client-side backpressure behavior.
  */
 static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
 {
@@ -2604,8 +2605,9 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	}
 
 	if (written >= 0) {
-		if ((map_flags & CEPH_OSDMAP_NEARFULL) ||
-		    (pool_flags & CEPH_POOL_FLAG_NEARFULL))
+		if (ceph_test_mount_opt(fsc, NEARFULL_SYNC) &&
+		    ((map_flags & CEPH_OSDMAP_NEARFULL) ||
+		     (pool_flags & CEPH_POOL_FLAG_NEARFULL)))
 			iocb->ki_flags |= IOCB_DSYNC;
 		written = generic_write_sync(iocb, written);
 	}
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index c05fbd4237f8..15edea30dc8b 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -177,6 +177,7 @@ enum {
 	Opt_wsync,
 	Opt_pagecache,
 	Opt_sparseread,
+	Opt_nearfull_sync,
 };
 
 enum ceph_recover_session_mode {
@@ -205,6 +206,7 @@ static const struct fs_parameter_spec ceph_mount_parameters[] = {
 	fsparam_flag_no ("ino32",			Opt_ino32),
 	fsparam_string	("mds_namespace",		Opt_mds_namespace),
 	fsparam_string	("mon_addr",			Opt_mon_addr),
+	fsparam_flag_no	("nearfull_sync",		Opt_nearfull_sync),
 	fsparam_flag_no ("poolperm",			Opt_poolperm),
 	fsparam_flag_no ("quotadf",			Opt_quotadf),
 	fsparam_u32	("rasize",			Opt_rasize),
@@ -593,6 +595,12 @@ static int ceph_parse_mount_param(struct fs_context *fc,
 		else
 			fsopt->flags |= CEPH_MOUNT_OPT_SPARSEREAD;
 		break;
+	case Opt_nearfull_sync:
+		if (result.negated)
+			fsopt->flags &= ~CEPH_MOUNT_OPT_NEARFULL_SYNC;
+		else
+			fsopt->flags |= CEPH_MOUNT_OPT_NEARFULL_SYNC;
+		break;
 	case Opt_test_dummy_encryption:
 #ifdef CONFIG_FS_ENCRYPTION
 		fscrypt_free_dummy_policy(&fsopt->dummy_enc_policy);
@@ -749,6 +757,8 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
 		seq_puts(m, ",nopagecache");
 	if (fsopt->flags & CEPH_MOUNT_OPT_SPARSEREAD)
 		seq_puts(m, ",sparseread");
+	if (fsopt->flags & CEPH_MOUNT_OPT_NEARFULL_SYNC)
+		seq_puts(m, ",nearfull_sync");
 
 	fscrypt_show_test_dummy_encryption(m, ',', root->d_sb);
 
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 1902b7cc55d3..0020ccd0f974 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -45,6 +45,7 @@
 #define CEPH_MOUNT_OPT_ASYNC_DIROPS    (1<<15) /* allow async directory ops */
 #define CEPH_MOUNT_OPT_NOPAGECACHE     (1<<16) /* bypass pagecache altogether */
 #define CEPH_MOUNT_OPT_SPARSEREAD      (1<<17) /* always do sparse reads */
+#define CEPH_MOUNT_OPT_NEARFULL_SYNC   (1<<18) /* sync writes when nearfull */
 
 #define CEPH_MOUNT_OPT_DEFAULT			\
 	(CEPH_MOUNT_OPT_DCACHE |		\