9abd2194ce
This reverts commit df645c22cc.
KVM 1.1.0 breaks several VM builds. The NixOS installer tests hang:
http://hydra.nixos.org/build/2763935
but worse, some builds give random failures indicating corruption:
http://hydra.nixos.org/build/2776221
http://hydra.nixos.org/build/2776180
http://hydra.nixos.org/build/2769347
http://hydra.nixos.org/build/2769337
28 lines
1.2 KiB
Diff
28 lines
1.2 KiB
Diff
From http://patchwork.ozlabs.org/patch/137186/
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diff -ru qemu-kvm-0.15.1-orig/block/vdi.c qemu-kvm-0.15.1/block/vdi.c
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--- qemu-kvm-0.15.1-orig/block/vdi.c 2011-10-19 15:54:48.000000000 +0200
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+++ qemu-kvm-0.15.1/block/vdi.c 2012-02-25 18:15:36.114574574 +0100
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@@ -1,7 +1,7 @@
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/*
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* Block driver for the Virtual Disk Image (VDI) format
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*
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- * Copyright (c) 2009 Stefan Weil
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+ * Copyright (c) 2009, 2012 Stefan Weil
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@@ -767,8 +767,12 @@
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acb->header_modified = 1;
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}
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acb->bmap_last = block_index;
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+ /* Copy data to be written to new block and zero unused parts. */
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+ memset(block, 0, sector_in_block * SECTOR_SIZE);
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memcpy(block + sector_in_block * SECTOR_SIZE,
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acb->buf, n_sectors * SECTOR_SIZE);
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+ memset(block + (sector_in_block + n_sectors) * SECTOR_SIZE, 0,
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+ (s->block_sectors - n_sectors - sector_in_block) * SECTOR_SIZE);
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acb->hd_iov.iov_base = (void *)block;
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acb->hd_iov.iov_len = s->block_size;
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qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
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