diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/include/lustre_linkea.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/include/lustre_linkea.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/staging/lustre/lustre/include/lustre_linkea.h b/drivers/staging/lustre/lustre/include/lustre_linkea.h index 249e8bf4fa22..3ff008fee13d 100644 --- a/drivers/staging/lustre/lustre/include/lustre_linkea.h +++ b/drivers/staging/lustre/lustre/include/lustre_linkea.h @@ -26,7 +26,19 @@ * Author: di wang <di.wang@intel.com> */ -#define DEFAULT_LINKEA_SIZE 4096 +/* There are several reasons to restrict the linkEA size: + * + * 1. Under DNE mode, if we do not restrict the linkEA size, and if there + * are too many cross-MDTs hard links to the same object, then it will + * casue the llog overflow. + * + * 2. Some backend has limited size for EA. For example, if without large + * EA enabled, the ldiskfs will make all EAs to share one (4K) EA block. + * + * 3. Too many entries in linkEA will seriously affect linkEA performance + * because we only support to locate linkEA entry consecutively. + */ +#define MAX_LINKEA_SIZE 4096 struct linkea_data { /** @@ -43,6 +55,7 @@ struct linkea_data { int linkea_data_new(struct linkea_data *ldata, struct lu_buf *buf); int linkea_init(struct linkea_data *ldata); +int linkea_init_with_rec(struct linkea_data *ldata); void linkea_entry_unpack(const struct link_ea_entry *lee, int *reclen, struct lu_name *lname, struct lu_fid *pfid); int linkea_entry_pack(struct link_ea_entry *lee, const struct lu_name *lname, |