b916c5cd4d
Usually a single IO is confined to one group of devices (group_width) and at the boundary of a raid group it can spill into a second group. Current code would allocate a full device_table size array at each io_state so it can comply to requests that span two groups. Needless to say that is very wasteful, specially when device_table count can get very large (hundreds even thousands), while a group_width is usually 8 or 10. * Change ore API to trim on IO that spans two raid groups. The user passes offset+length to ore_get_rw_state, the ore might trim on that length if spanning a group boundary. The user must check ios->length or ios->nrpages to see how much IO will be preformed. It is the responsibility of the user to re-issue the reminder of the IO. * Modify exofs To copy spilled pages on to the next IO. This means one last kick is needed after all coalescing of pages is done. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> |
||
|---|---|---|
| .. | ||
| BUGS | ||
| Kbuild | ||
| Kconfig | ||
| common.h | ||
| dir.c | ||
| exofs.h | ||
| file.c | ||
| inode.c | ||
| namei.c | ||
| ore.c | ||
| super.c | ||
| symlink.c | ||