haraldwolff/qemu-patch-raspberry4
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qcow2: Resize the cache upon image resizing

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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 <lbloch@janustech.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Leonid Bloch 2018-09-26 19:04:45 +03:00 committed by Kevin Wolf
parent 80668d0fb7
commit 45b4949c7b
1 changed files with 11 additions and 0 deletions
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11
block/qcow2.c
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@ -3418,6 +3418,7 @@ 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)
@ -3642,6 +3643,8 @@ 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),
@ -3652,6 +3655,14 @@ 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);
qobject_unref(options);
if (ret < 0) {
goto fail;
}
ret = 0;
fail:
qemu_co_mutex_unlock(&s->lock);