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kvm tools, qcow: Don't fdatasync() L2 table writeout

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There's now now point in making sure new L2 tables actually hit the disk before
we write out data to clusters because they are not visible on-disk until
qcow_disk_flush() is called which flushes the L1 table.

Cc: Asias He <asias.hejun@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Prasad Joshi <prasadjoshi124@gmail.com>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Pekka Enberg
2015-06-01 16:39:46 +01:00
committed by Will Deacon
parent 73984b1184
commit 6fe151ae1d
1 changed files with 1 additions and 1 deletions
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disk/qcow.c
+1 -1
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@@ -345,7 +345,7 @@ static u64 qcow_write_l2_table(struct qcow *q, u64 *table)
clust_sz = 1 << header->cluster_bits;
off = ALIGN(f_sz, clust_sz);
if (qcow_pwrite_sync(q->fd, table, sz * sizeof(u64), off) < 0)
if (pwrite_in_full(q->fd, table, sz * sizeof(u64), off) < 0)
return 0;
return off;