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| author |   Amir Goldstein <amir73il@gmail.com> | 2017-01-17 06:34:57 +0200 |
|---|---|---|
| committer |   Miklos Szeredi <mszeredi@redhat.com> | 2017-02-07 15:47:14 +0100 |
| commit | 01ad3eb8a07385bc8849f0ee7c800e7c8bd7287e (patch) | |
| tree | dd56100b213de1a7983f2f1a2597ed169dd31d62 /fs/overlayfs/super.c | |
| parent | ovl: introduce copy up waitqueue (diff) | |
| download | linux-dev-01ad3eb8a07385bc8849f0ee7c800e7c8bd7287e.tar.xz linux-dev-01ad3eb8a07385bc8849f0ee7c800e7c8bd7287e.zip | |
ovl: concurrent copy up of regular files
Now that copy up of regular file is done using O_TMPFILE,
we don't need to hold rename_lock throughout copy up.
Use the copy up waitqueue to synchronize concurrent copy up
of the same file. Different regular files can be copied up
concurrently.
The upper dir inode_lock is taken instead of rename_lock,
because it is needed for lookup and later for linking the
temp file, but it is released while copying up data.
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/super.c')
0 files changed, 0 insertions, 0 deletions