0f796dd004
Update to v4.1.0. Also includes other major packaging changes as follows: There is a new package maintenance workflow - see README.PACKAGING for details. The sibling packages qemu-linux-user and qemu-testsuite are now created with the Build Service's MultiBuild feature. This also necessitates combining the qemu-linux-user changelog content back into qemu's. Luckily the delta there is quite small. Note that the qemu spec file is now that much busier, but added section markers should help reduce the confusion. Also qemu is being enabled for RISCV host compatibility, so some changes are related to that as well. OBS-URL: https://build.opensuse.org/request/show/730437 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=487
50 lines
1.9 KiB
Diff
50 lines
1.9 KiB
Diff
From: Bruce Rogers <brogers@suse.com>
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Date: Wed, 9 Mar 2016 15:18:11 -0700
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Subject: xen_disk: Add suse specific flush disable handling and map to QEMU
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equiv
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Add code to read the suse specific suse-diskcache-disable-flush flag out
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of xenstore, and set the equivalent flag within QEMU.
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Patch taken from Xen's patch queue, Olaf Hering being the original author.
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[bsc#879425]
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[BR: minor edits to pass qemu's checkpatch script]
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[BR: With qdevification of xen-block, code has changed significantly]
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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Signed-off-by: Olaf Hering <olaf@aepfle.de>
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---
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hw/block/xen-block.c | 12 ++++++++++++
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1 file changed, 12 insertions(+)
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diff --git a/hw/block/xen-block.c b/hw/block/xen-block.c
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index 69d73196e2a074e771f5fb771649..9bc6db52b4be8510e322e61ba5a7 100644
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--- a/hw/block/xen-block.c
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+++ b/hw/block/xen-block.c
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@@ -741,6 +741,8 @@ static XenBlockDrive *xen_block_drive_create(const char *id,
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const char *mode = qdict_get_try_str(opts, "mode");
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const char *direct_io_safe = qdict_get_try_str(opts, "direct-io-safe");
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const char *discard_enable = qdict_get_try_str(opts, "discard-enable");
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+ const char *suse_diskcache_disable_flush = qdict_get_try_str(opts,
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+ "suse-diskcache-disable-flush");
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char *driver = NULL;
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char *filename = NULL;
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XenBlockDrive *drive = NULL;
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@@ -810,6 +812,16 @@ static XenBlockDrive *xen_block_drive_create(const char *id,
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}
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}
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+ if (suse_diskcache_disable_flush) {
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+ unsigned long value;
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+ if (!qemu_strtoul(suse_diskcache_disable_flush, NULL, 2, &value) && !!value) {
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+ QDict *cache_qdict = qdict_new();
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+
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+ qdict_put_bool(cache_qdict, "no-flush", true);
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+ qdict_put_obj(file_layer, "cache", QOBJECT(cache_qdict));
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+ }
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+ }
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+
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/*
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* It is necessary to turn file locking off as an emulated device
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* may have already opened the same image file.
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