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Revision e9f53353e166a67dfe4f8295100f8ac39d6cf10b authored by Daejun Park on 06 January 2021, 01:32:42 UTC, committed by Theodore Ts'o on 15 January 2021, 19:41:31 UTC 
ext4: remove expensive flush on fast commit
 
In the fast commit, it adds REQ_FUA and REQ_PREFLUSH on each fast
commit block when barrier is enabled.  However, in recovery phase,
ext4 compares CRC value in the tail.  So it is sufficient to add
REQ_FUA and REQ_PREFLUSH on the block that has tail.

Signed-off-by: Daejun Park <daejun7.park@samsung.com>
Reviewed-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20210106013242epcms2p5b6b4ed8ca86f29456fdf56aa580e74b4@epcms2p5
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
1 parent 6b4b8e6
Raw File
syscall.c 
/*
 * Will go away once libc support is there
 */
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/uio.h>
#include <signal.h>
#include "liburing.h"

#ifdef __alpha__
/*
 * alpha is the only exception, all other architectures
 * have common numbers for new system calls.
 */
# ifndef __NR_io_uring_setup
#  define __NR_io_uring_setup		535
# endif
# ifndef __NR_io_uring_enter
#  define __NR_io_uring_enter		536
# endif
# ifndef __NR_io_uring_register
#  define __NR_io_uring_register	537
# endif
#else /* !__alpha__ */
# ifndef __NR_io_uring_setup
#  define __NR_io_uring_setup		425
# endif
# ifndef __NR_io_uring_enter
#  define __NR_io_uring_enter		426
# endif
# ifndef __NR_io_uring_register
#  define __NR_io_uring_register	427
# endif
#endif

int io_uring_register(int fd, unsigned int opcode, void *arg,
		      unsigned int nr_args)
{
	return syscall(__NR_io_uring_register, fd, opcode, arg, nr_args);
}

int io_uring_setup(unsigned int entries, struct io_uring_params *p)
{
	return syscall(__NR_io_uring_setup, entries, p);
}

int io_uring_enter(int fd, unsigned int to_submit, unsigned int min_complete,
		   unsigned int flags, sigset_t *sig)
{
	return syscall(__NR_io_uring_enter, fd, to_submit, min_complete,
			flags, sig, _NSIG / 8);
}
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