* [SPDK] Reading data may cause dirty data（theory）
@ 2022-07-01 6:33 15735154041
0 siblings, 0 replies; 2+ messages in thread
From: 15735154041 @ 2022-07-01 6:33 UTC (permalink / raw
To: spdk
[-- Attachment #1: Type: text/plain, Size: 556 bytes --]
1. The process by spdk_nvme_ns_cmd_read read data
2. firmware write data to pcie address space
3. Process Exits unexpectedly（The firmware does not perceive that the process exits abnormally）
4. The pcie address space is allocated to another process
5. Firmware continues to write data to the pcie address space
6. another process read dirty data
SPDK reads data and converts host memory address (virtual address) to physical address (pcie address) in the driver layer.
After the firmware gets the physical address, it maps it to read and write
^ permalink raw reply [flat|nested] 2+ messages in thread
* [SPDK] Reading data may cause dirty data（theory）
@ 2022-07-01 6:33 15735154041
0 siblings, 0 replies; 2+ messages in thread
From: 15735154041 @ 2022-07-01 6:33 UTC (permalink / raw
To: spdk
[-- Attachment #1: Type: text/plain, Size: 556 bytes --]
1. The process by spdk_nvme_ns_cmd_read read data
2. firmware write data to pcie address space
3. Process Exits unexpectedly（The firmware does not perceive that the process exits abnormally）
4. The pcie address space is allocated to another process
5. Firmware continues to write data to the pcie address space
6. another process read dirty data
SPDK reads data and converts host memory address (virtual address) to physical address (pcie address) in the driver layer.
After the firmware gets the physical address, it maps it to read and write
^ permalink raw reply [flat|nested] 2+ messages in thread
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