Commit 2568a3b7 authored by heikki@hundin.mysql.fi's avatar heikki@hundin.mysql.fi
Browse files

os0file.c: 

  Align the buffer used in initing a data file to zero; this may be needed if the data file is actually a raw device
parent 393bd5cf

innobase/os/os0file.c

+6 −2
Original line number Diff line number Diff line
@@ -690,6 +690,7 @@ os_file_set_size( 
	ulint   	n_bytes;

	ibool		ret;

	byte*   	buf;

	byte*   	buf2;

	ulint   	i;



	ut_a(size == (size & 0xFFFFFFFF));
@@ -697,7 +698,10 @@ os_file_set_size( 
	/* We use a very big 8 MB buffer in writing because Linux may be

	extremely slow in fsync on 1 MB writes */



	buf = ut_malloc(UNIV_PAGE_SIZE * 512);

	buf2 = ut_malloc(UNIV_PAGE_SIZE * 513);



	/* Align the buffer for possible raw i/o */

	buf = ut_align(buf2, UNIV_PAGE_SIZE);



	/* Write buffer full of zeros */

	for (i = 0; i < UNIV_PAGE_SIZE * 512; i++) {
@@ -725,7 +729,7 @@ os_file_set_size( 
	        offset += n_bytes;

	}



	ut_free(buf);

	ut_free(buf2);



	ret = os_file_flush(file);