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[Qemu-devel] [PATCH v4 3/5] qcow2: Resize the cache upon image resizing
From: |
Leonid Bloch |
Subject: |
[Qemu-devel] [PATCH v4 3/5] qcow2: Resize the cache upon image resizing |
Date: |
Thu, 9 Aug 2018 01:11:36 +0300 |
The caches are now recalculated upon image resizing. This is done
because the new default behavior of assigning L2 cache relatively to
the image size, implies that the cache will be adapted accordingly
after an image resize.
Signed-off-by: Leonid Bloch <address@hidden>
---
block/qcow2.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/block/qcow2.c b/block/qcow2.c
index 98cb96aaca..3f75b6e701 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3415,6 +3415,7 @@ static int coroutine_fn
qcow2_co_truncate(BlockDriverState *bs, int64_t offset,
uint64_t old_length;
int64_t new_l1_size;
int ret;
+ QDict *options;
if (prealloc != PREALLOC_MODE_OFF && prealloc != PREALLOC_MODE_METADATA &&
prealloc != PREALLOC_MODE_FALLOC && prealloc != PREALLOC_MODE_FULL)
@@ -3639,6 +3640,8 @@ static int coroutine_fn
qcow2_co_truncate(BlockDriverState *bs, int64_t offset,
}
}
+ bs->total_sectors = offset / BDRV_SECTOR_SIZE;
+
/* write updated header.size */
offset = cpu_to_be64(offset);
ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, size),
@@ -3649,6 +3652,13 @@ static int coroutine_fn
qcow2_co_truncate(BlockDriverState *bs, int64_t offset,
}
s->l1_vm_state_index = new_l1_size;
+
+ /* Update cache sizes */
+ options = qdict_clone_shallow(bs->options);
+ ret = qcow2_update_options(bs, options, s->flags, errp);
+ if (ret < 0) {
+ goto fail;
+ }
ret = 0;
fail:
qemu_co_mutex_unlock(&s->lock);
--
2.17.1
- Re: [Qemu-devel] [PATCH v4 2/5] qcow2: Assign the L2 cache relatively to image size, (continued)
- Re: [Qemu-devel] [PATCH v4 2/5] qcow2: Assign the L2 cache relatively to image size, Alberto Garcia, 2018/08/09
- Re: [Qemu-devel] [PATCH v4 2/5] qcow2: Assign the L2 cache relatively to image size, Leonid Bloch, 2018/08/09
- Re: [Qemu-devel] [PATCH v4 2/5] qcow2: Assign the L2 cache relatively to image size, Alberto Garcia, 2018/08/09
- Re: [Qemu-devel] [PATCH v4 2/5] qcow2: Assign the L2 cache relatively to image size, Leonid Bloch, 2018/08/09
- Re: [Qemu-devel] [PATCH v4 2/5] qcow2: Assign the L2 cache relatively to image size, Eric Blake, 2018/08/09
- Re: [Qemu-devel] [PATCH v4 2/5] qcow2: Assign the L2 cache relatively to image size, Leonid Bloch, 2018/08/09
[Qemu-devel] [PATCH v4 4/5] qcow2: Set the default cache-clean-interval to 10 minutes, Leonid Bloch, 2018/08/08
[Qemu-devel] [PATCH v4 3/5] qcow2: Resize the cache upon image resizing,
Leonid Bloch <=
[Qemu-devel] [PATCH v4 5/5] qcow2: Explicit number replaced by a constant, Leonid Bloch, 2018/08/08