Jan Kara <jack@xxxxxxx> writes:
> Can you please post the reproduce here as well? I couldn't easily find it
> with google.
Here it is, Jan.
-Jeff
#define _GNU_SOURCE
#include <libaio.h>
#include <assert.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
int main(int ac, char** av) {
int fd;
char* buf;
io_context_t ioc = NULL;
int r;
struct iocb iocb;
struct iocb *iocbp[1];
struct io_event ioev;
buf = aligned_alloc(4096, 4096*4);
assert(buf);
r = io_setup(1, &ioc);
assert(r == 0);
fd = open("tmp.tmp", O_RDWR | O_CREAT | O_DIRECT, 0600);
assert(fd >= 0);
io_prep_pwrite(&iocb, fd, buf, 4096*4, 0);
iocbp[0] = &iocb;
r = io_submit(ioc, 1, iocbp);
assert(r == 1);
r = io_getevents(ioc, 1, 1, &ioev, NULL);
assert(r == 1);
assert(ioev.res == 4*4096);
ftruncate(fd, 13002);
io_prep_pread(&iocb, fd, buf, 8192, 13312);
r = io_submit(ioc, 1, iocbp);
assert(r == 1);
r = io_getevents(ioc, 1, 1, &ioev, NULL);
assert(r == 1);
printf("read result: %d\n", (int)ioev.res);
return 0;
}
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