mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 21:17:50 +07:00
f88f0bdfc3
UBD at present is extremely slow because it handles only one request at a time in the IO thread and IRQ handler. The single request at a time is replaced by handling multiple requests as well as necessary workarounds for short reads/writes. Resulting performance improvement in disk IO - 30% Signed-off-by: Anton Ivanov <aivanov@kot-begemot.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
21 lines
430 B
C
21 lines
430 B
C
/*
|
|
* Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
|
|
* Copyright (C) 2001 RidgeRun, Inc (glonnon@ridgerun.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __UM_UBD_USER_H
|
|
#define __UM_UBD_USER_H
|
|
|
|
extern int start_io_thread(unsigned long sp, int *fds_out);
|
|
extern int io_thread(void *arg);
|
|
extern int kernel_fd;
|
|
|
|
extern int ubd_read_poll(int timeout);
|
|
extern int ubd_write_poll(int timeout);
|
|
|
|
#define UBD_REQ_BUFFER_SIZE 64
|
|
|
|
#endif
|
|
|