36dc99adac
deadlock in VOP_FSYNC() if the unreferenced vnode picked for reclamation happened to be stacked on top of a vnode the process already had locked. This could happen if the same filesystem was accessed both through a union mount and directly; it seemed to happen most frequently when the direct access was through NFS. Avoid this deadlock by changing vinvalbuf to pass a new FSYNC_RECLAIM flag bit to VOP_FSYNC() to indicate that a reclaim is in progress and only a `shallow' fsync is necessary. Do nothing in *_fsync() in umapfs, nullfs, and unionfs when FSYNC_RECLAIM is set; the underlying vnodes will shortly be released in *_reclaim and may be reclaimed (and fsync'ed) later. |
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| .. | ||
| Makefile | ||
| umap.h | ||
| umap_subr.c | ||
| umap_vfsops.c | ||
| umap_vnops.c | ||