tikvrpc: avoid data race on XxxRequest.Context
#1242
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Signed-off-by: zyguan <[email protected]>
Signed-off-by: zyguan <[email protected]>
cfzjywxk
reviewed
Mar 20, 2024
Signed-off-by: zyguan <[email protected]>
MyonKeminta
reviewed
Mar 21, 2024
| @@ -118,6 +118,11 @@ const ( | |||
| CmdEmpty CmdType = 3072 + iota | |||
| ) | |||
|
|
|||
| // CmdType aliases. | |||
| const ( | |||
| CmdGetKeyTTL = CmdRawGetKeyTTL | |||
| } else { | ||
| cmd := *req.${cmd}() | ||
| cmd.Context = ctx | ||
| req.Req = &cmd |
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May there still be data race on the reading/writing the pointer req.Req?
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No, I only see the data race on the value refered by the pointer, AFAIK, there is no concurrent access to the pointer field itself.
Signed-off-by: zyguan <[email protected]>
MyonKeminta
approved these changes
Mar 21, 2024
Does this have anything to do with this PR? |
@zyguan PTAL |
Signed-off-by: zyguan <[email protected]>
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* tikvrpc: avoid data race on `XxxRequest.Context` Signed-off-by: zyguan <[email protected]> * fix grammar of codegen comment Signed-off-by: zyguan <[email protected]> * address comments Signed-off-by: zyguan <[email protected]> * check diff of go generate Signed-off-by: zyguan <[email protected]> * fix a typo Signed-off-by: zyguan <[email protected]> --------- Signed-off-by: zyguan <[email protected]>
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* tikvrpc: avoid data race on `XxxRequest.Context` * fix grammar of codegen comment * address comments * check diff of go generate * fix a typo --------- Signed-off-by: zyguan <[email protected]>
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Try to fix pingcap/tidb#51921 . To reduce the memory allocation overhead, only do COW when
req.rev > 0.