get created automatically, as this is almost always what is wanted.
- Give useful message if raid4/5/6 cannot be started because it is
not clean and is also degraded.
+ - Increase raid456 stripe cache size if needed to --grow the array.
+ The setting used unfortunately requires intimate knowledge of the
+ kernel, and it not reset when the reshape finishes.
Changes Prior to 2.5.6 release
- Fix bug which meant "bitmap=xxx" in mdadm.conf was not handled
case 6:
st = super_by_version(array.major_version,
array.minor_version);
- /* size can be changed independantly.
+ /* size can be changed independently.
* layout/chunksize/raid_disks/level can be changed
* though the kernel may not support it all.
* If 'suspend_lo' is not present in devfs, then
printf("mdadm: Need to backup %lluK of critical section..\n", last_block/2);
sra = sysfs_read(fd, 0,
- GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE);
+ GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|
+ GET_CACHE);
if (!sra) {
fprintf(stderr, Name ": %s: Cannot get array details from sysfs\n",
devname);
array.chunk_size = nchunk;
array.layout = nlayout;
if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) {
+ if (errno == ENOSPC) {
+ /* stripe cache is not big enough.
+ * It needs to be 4 times chunksize_size,
+ * and we assume pagesize is 4K
+ */
+ if (sra->cache_size < 4 * (nchunk/4096)) {
+ sysfs_set_num(sra, NULL,
+ "stripe_cache_size",
+ 4 * (nchunk/4096) +1);
+ if (ioctl(fd, SET_ARRAY_INFO,
+ &array) == 0)
+ goto ok;
+ }
+ }
fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
devname, strerror(errno));
goto abort;
}
+ ok: ;
/* suspend the relevant region */
sysfs_set_num(sra, NULL, "suspend_hi", 0); /* just in case */
goto abort;
sra->chunk = strtoul(buf, NULL, 0);
}
+ if (options & GET_CACHE) {
+ strcpy(base, "stripe_cache_size");
+ if (load_sys(fname, buf))
+ goto abort;
+ sra->cache_size = strtoul(buf, NULL, 0);
+ }
if (! (options & GET_DEVS))
return sra;