On 12/12/25 08:55, Jaegeuk Kim via Linux-f2fs-devel wrote:
> Signed-off-by: Jaegeuk Kim <[email protected]>
> ---
> tools/f2fs_io/f2fs_io.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
> index 4429e0b0459c..08f3c9b79cdf 100644
> --- a/tools/f2fs_io/f2fs_io.c
> +++ b/tools/f2fs_io/f2fs_io.c
> @@ -938,6 +938,7 @@ static void do_write_advice(int argc, char **argv, const
> struct cmd_desc *cmd)
> " dontcache: buffered IO + dontcache\n" \
> " dio : direct IO\n" \
> " mmap : mmap IO\n" \
> +" mlock : mmap + mlock\n" \
> " madvise : mmap + mlock2 + madvise\n" \
> " fadvise : mmap + fadvise + mlock\n" \
> "advice can be\n" \
> @@ -956,6 +957,7 @@ static void do_read(int argc, char **argv, const struct
> cmd_desc *cmd)
> u64 mlock_time_start = 0, mlock_time_end = 0;
> int flags = 0;
> int do_mmap = 0;
> + int do_mlock = 0;
> int do_fadvise = 0;
> int do_madvise = 0;
> int do_dontcache = 0;
> @@ -981,6 +983,8 @@ static void do_read(int argc, char **argv, const struct
> cmd_desc *cmd)
> flags |= O_DIRECT;
> else if (!strcmp(argv[4], "mmap"))
> do_mmap = 1;
> + else if (!strcmp(argv[4], "mlock"))
> + do_mlock = 1;
> else if (!strcmp(argv[4], "madvise"))
> do_madvise = 1;
> else if (!strcmp(argv[4], "fadvise"))
> @@ -1027,6 +1031,18 @@ static void do_read(int argc, char **argv, const
> struct cmd_desc *cmd)
> mlock_time_end = get_current_us();
> read_cnt = count * buf_size;
> memcpy(print_buf, data, print_bytes);
> + } else if (do_mlock) {
> + data = mmap(NULL, count * buf_size, PROT_READ,
> + MAP_SHARED, fd, offset);
> + if (data == MAP_FAILED)
> + die("Mmap failed");
> +
> + io_time_start = get_current_us();
mlock_time_start = get_current_us();
> + if (mlock(data, count * buf_size))
> + die_errno("mlock failed");
> + io_time_end = get_current_us();
mlock_time_end = get_current_us();
Thanks,
> + read_cnt = count * buf_size;
> + memcpy(print_buf, data, print_bytes);
> } else if (do_madvise) {
> data = mmap(NULL, count * buf_size, PROT_READ,
> MAP_SHARED, fd, offset);
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