你好，
非常欢迎参与 openEuler kernel 开发。
首先在这里提交 issue，描述下要解决什么问题。
https://gitee.com/openeuler/kernel/issues
补丁的 Commit Message 中 附上对应的 issue 链接，
如在bugzila 行添加： bugzilla: https://gitee.com/openeuler/kernel/issues/I3DJ83
然后将适配之后的补丁发往 kernel@openeuler.org,
有问题可以联系我或 Cheng Jian.
---
Xie XiuQi
On 2021/8/27 14:18, 徐力群 wrote:
*发件人:*徐力群 *发送时间:*2021年8月27日14:18 *收件人:*kernel-owner@openeuler.org；<kernel-owner@openeuler.org;>; kernel@openeuler.org *主题:*请教一下，想提交一个内核的补丁，怎么操作，谢谢。（补丁内容见内）
该补丁打上之后，guest如果删除了磁盘的文件，那么从host上看磁盘文件会变小。
virtio_blk: add discard and write zeroes support
mainline inclusion
from mainline-5.14-rc7
commit 1f23816b8eb8fdc39990abe166c10a18c16f6b21、af822aa68fbdf0a480a17462ed70232998127453
category: bugfix
bugzilla: NA
CVE: NA
from：
https://github.com/torvalds/linux/commit/1f23816b8eb8fdc39990abe166c10a18c16... https://github.com/torvalds/linux/commit/1f23816b8eb8fdc39990abe166c10a18c16f6b21
https://github.com/torvalds/linux/commit/af822aa68fbdf0a480a17462ed702329981... https://github.com/torvalds/linux/commit/af822aa68fbdf0a480a17462ed70232998127453
In commit 88c85538, "virtio-blk: add discard and write zeroes features
to specification" (https://github.com/oasis-tcs/virtio-spec https://github.com/oasis-tcs/virtio-spec), the virtio
block specification has been extended to add VIRTIO_BLK_T_DISCARD and
VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support for
discard and write zeroes in the virtio-blk driver when the device
advertises the corresponding features, VIRTIO_BLK_F_DISCARD and
VIRTIO_BLK_F_WRITE_ZEROES.