On Wed, Mar 25, 2026 at 06:20:25PM +0000, Pasha Tatashin wrote: > Currently, LUO does not prevent the same file from being managed twice > across different active sessions. > > Use a global xarray luo_preserved_files to keep track of file > pointers being preserved by LUO. Update luo_preserve_file() to check and > insert the file pointer into this xarray when it is preserved, and > erase it in luo_file_unpreserve_files() when it is released. > > This ensures that the same file (struct file) cannot be managed by > multiple sessions. If another session attempts to preserve an already > managed file, it will now fail with -EBUSY. > > Acked-by: Pratyush Yadav (Google) <[email protected]> > Reviewed-by: Samiullah Khawaja <[email protected]> > Signed-off-by: Pasha Tatashin <[email protected]>
Reviewed-by: Mike Rapoport (Microsoft) <[email protected]> > --- > kernel/liveupdate/luo_file.c | 26 +++++++++++++++++++++++--- > 1 file changed, 23 insertions(+), 3 deletions(-) -- Sincerely yours, Mike.
