[PATCH v2] man/man2/mount.2: add ENOSPC
From: Chen Linxuan via B4 Relay <devnull+me.black-desk.cn@kernel.org>
Date: 2026-02-01 03:59:40
Also in:
b4-sent
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Chen Linxuan <redacted>
After linux commit d29216842a85 ("mnt: Add a per mount namespace limit
on the number of mounts"), mount(2) might return ENOSPC.
Signed-off-by: Chen Linxuan <redacted>
---
Changes in v2:
- Apply changes suggested by Alejandro:
- Correct the sign-off line;
- Use semantic newlines.
- Link to v1: https://lore.kernel.org/r/20260130-add-enospc-for-mount-v1-1-85b45f0ce3d8@black-desk.cn (local)
---
man/man2/mount.2 | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/man/man2/mount.2 b/man/man2/mount.2
index d5a68cb836b2..35fef946a6d6 100644
--- a/man/man2/mount.2
+++ b/man/man2/mount.2@@ -793,6 +793,21 @@ A pathname was empty or had a nonexistent component. .B ENOMEM The kernel could not allocate a free page to copy filenames or data into. .TP +.B ENOSPC +Number of mounts will exceed the limit after this syscall +in some mount namespaces. +This limit is controlled by +.IR /proc/sys/fs/mount-max , +see +.BR proc_sys_fs (5) +for details of this limit. +Note that this limit applies +both to the mount namespace where the mount operation occurs +and to any mount namespaces to which the mount will propagate. +See +.BR mount_namespaces (7) +for details for mount namespace and mount propagation. +.TP .B ENOTBLK .I source is not a block device (and a device was required). ---
base-commit: 6754bd1a126ed1e9b7d9c2bc1d221681f5182bb3 change-id: 20260130-add-enospc-for-mount-3ea1e87af6ee Best regards, -- Chen Linxuan [off-list ref]