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Without O_LARGEFILE, file->f_op->write_iter calls generic_write_check_limits(), which enforces a 2GB (MAX_NON_LFS) limit, causing -EFBIG on large writes. In shmem_pwrite(), this error is later masked as -EIO due to the error handling order, leading to igt failures like gen9_exec_parse(bb-large). Set O_LARGEFILE in __create_shmem() to prevent -EFBIG on large writes. Reported-by: kernel test robot <oliver.sang@intel.com> Closes: https://lore.kernel.org/oe-lkp/202508081029.343192ec-lkp@intel.com Fixes:048832a3f4("drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter") Signed-off-by: Taotao Chen <chentaotao@didiglobal.com> Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com> Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com> Link: https://lore.kernel.org/r/20250822030651.28099-1-chentaotao@didiglobal.com (cherry picked from commite296a2266c) Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>