[lustre-devel] [PATCH 28/42] lustre: obdclass: prefer T10 checksum if the target supports it
James Simmons <[email protected]>
| Newsgroups | org.lustre.lists.lustre-devel |
|---|---|
| Message-ID | <[email protected]> |
From: Li Dongyang <[email protected]> If the target actually has T10PI support, we prefer to use that T10 checksum even it's not the fastest on the client, given checksum_type is not explicitly set. WC-bug-id: https://jira.whamcloud.com/browse/LU-14912 Lustre-commit: 5e9059e08aec6fb36 ("LU-14912 obdclass: prefer T10 checksum if the target supports it") Signed-off-by: Li Dongyang <[email protected]> Reviewed-on: https://review.whamcloud.com/44657 Reviewed-by: Andreas Dilger <[email protected]> Tested-by: Andreas Dilger <[email protected]> Reviewed-by: Li Xi <[email protected]> Signed-off-by: James Simmons <[email protected]> --- fs/lustre/include/obd_cksum.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/lustre/include/obd_cksum.h b/fs/lustre/include/obd_cksum.h index 36443fd5a156..052635d5d5b0 100644 --- a/fs/lustre/include/obd_cksum.h +++ b/fs/lustre/include/obd_cksum.h @@ -118,6 +118,13 @@ enum cksum_types obd_cksum_type_select(const char *obd_name, if (preferred & cksum_types) return preferred; + /* + * Server reporting a single T10 checksum type + * means the target actually supports T10-PI. + */ + if (hweight32(cksum_types & OBD_CKSUM_T10_ALL) == 1) + return cksum_types & OBD_CKSUM_T10_ALL; + flag = obd_cksum_type_pack(obd_name, cksum_types); return obd_cksum_type_unpack(flag); -- 2.27.0 _______________________________________________ lustre-devel mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-devel-lustre.org