98a5231fe5
devfs_io() can't fall back to calling vfs_synchronous_io(), if the device driver doesn't support handling requests asynchronously. The presence of the io() hook leads the VFS (do_iterative_fd_io()) to believe that asynchronous handling is supported and set a finished-callback on the request which calls the io() hook to start the next chunk. Thus, instead of iterating through the request in a loop the iteration happens recursively. For sufficiently fragmented requests the stack may overflow (ticket #9900). * Introduce a new vnode operation supports_operation(). It can be called by the VFS to determine whether a present hook is actually currently supported for a given vnode. * devfs: implement the new hook and remove the fallback handling in devfs_io(). * vfs_request_io.cpp: use the new hook to determine whether the io() hook is really supported. |
||
|---|---|---|
| .. | ||
| bus | ||
| pcmcia | ||
| tty | ||
| usb | ||
| ACPI.h | ||
| atomizer.h | ||
| bios.h | ||
| bus_manager.h | ||
| config_manager.h | ||
| cpuidle.h | ||
| device_manager.h | ||
| disk_device_manager.h | ||
| dpc.h | ||
| driver_settings.h | ||
| Drivers.h | ||
| fs_cache.h | ||
| fs_interface.h | ||
| interrupt_controller.h | ||
| io_requests.h | ||
| ISA.h | ||
| isapnp.h | ||
| KernelExport.h | ||
| locked_pool.h | ||
| midi_driver.h | ||
| mime_table.h | ||
| module.h | ||
| PCI_x86.h | ||
| PCI.h | ||
| Select.h | ||
| USB2.h | ||
| USB3.h | ||
| USB_printer.h | ||
| USB_rle.h | ||
| USB_spec.h | ||
| USB.h | ||