diff options
Diffstat (limited to 'module/zfs/zfs_vnops.c')
| -rw-r--r-- | module/zfs/zfs_vnops.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/module/zfs/zfs_vnops.c b/module/zfs/zfs_vnops.c index bbc171bd2..c77101485 100644 --- a/module/zfs/zfs_vnops.c +++ b/module/zfs/zfs_vnops.c @@ -439,6 +439,7 @@ int zfs_read(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr) { int error = 0; + boolean_t frsync = B_FALSE; znode_t *zp = ITOZ(ip); zfsvfs_t *zfsvfs = ITOZSB(ip); @@ -466,12 +467,19 @@ zfs_read(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr) return (0); } +#ifdef FRSYNC /* * If we're in FRSYNC mode, sync out this znode before reading it. * Only do this for non-snapshots. + * + * Some platforms do not support FRSYNC and instead map it + * to FSYNC, which results in unnecessary calls to zil_commit. We + * only honor FRSYNC requests on platforms which support it. */ + frsync = !!(ioflag & FRSYNC); +#endif if (zfsvfs->z_log && - (ioflag & FRSYNC || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)) + (frsync || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)) zil_commit(zfsvfs->z_log, zp->z_id); /* |