pNFS: Don't throw out valid layout segments (faa4a54f) · Commits · 戴 / test

It is OK for layout segments to remain hashed even if no-one holds any references to them, provided that the segments are still valid. Signed-off-by:

fs/nfs/pnfs.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -422,6 +422,10 @@ pnfs_put_lseg(struct pnfs_layout_segment *lseg)
		pnfs_layoutreturn_before_put_lseg(lseg, lo, inode);

		if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) {
		if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) {
		spin_unlock(&inode->i_lock);
		return;
		}
		pnfs_get_layout_hdr(lo);
		pnfs_layout_remove_lseg(lo, lseg);
		spin_unlock(&inode->i_lock);
		@@ -462,6 +466,8 @@ pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg)
		test_bit(NFS_LSEG_VALID, &lseg->pls_flags));
		if (atomic_dec_and_test(&lseg->pls_refcount)) {
		struct pnfs_layout_hdr *lo = lseg->pls_layout;
		if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags))
		return;
		pnfs_get_layout_hdr(lo);
		pnfs_layout_remove_lseg(lo, lseg);
		pnfs_free_lseg_async(lseg);