The commit is pushed to "branch-rh9-5.14.0-427.37.1.vz9.78.x-ovz" and will
appear at g...@bitbucket.org:openvz/vzkernel.git
after rh9-5.14.0-427.37.1.vz9.78.3
------>
commit 28d0318fc15c216d8b9a804a811f781a6a2fc9cb
Author: Alexey Kuznetsov <kuz...@virtuozzo.com>
Date: Fri Nov 8 00:03:54 2024 +0800
fs: fuse: set FMODE_NOWAIT flag on vstorage files
FMODE_NOWAIT is new kernel API added quite a while ago, but activated
in the latest rhel updates. Earlier kernels had a bug,
fses without associated bdev (like fuse or any other virtual
file system) enforced this flag at top level. This bug
has been fixed, FMODE_NOWAIT is respected by top vfs layer,
so vstorage is executed without this flag which resulted
in serious performance degradation.
NOTE. Actual implementation of NOWAIT IO could be
an interesting improvement. As our qemu still does not use
io_uring, it is still useless, but io_uring will change the picture.
Affects: #VSTOR-94858
https://virtuozzo.atlassian.net/browse/VSTOR-94829
Signed-off-by: Alexey Kuznetsov <kuz...@virtuozzo.com>
Feature: vStorage
---
fs/fuse/file.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 195b77114d02..aa248bd90694 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -354,6 +354,9 @@ int fuse_open_common(struct inode *inode, struct file
*file, bool isdir)
i_size_write(inode, size);
}
+ if (fc->close_wait)
+ file->f_mode |= FMODE_NOWAIT;
+
spin_unlock(&fi->lock);
inode_unlock(inode);
_______________________________________________
Devel mailing list
Devel@openvz.org
https://lists.openvz.org/mailman/listinfo/devel
