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Add workaround for current kernel bug related to WRITEV and IOSEQ_ASYNC

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Motivation:

There is currently a bug in the kernel that let WRITEV sometimes fail
when IOSEQ_ASYNC is enabled

Modifications:

Don't use IOSEQ_ASYNC for WRITEV for now

Result:

Tests pass
This commit is contained in:
Norman Maurer 2020-09-05 10:22:02 +02:00
parent c6db51ba1f
commit ccd5a6e411
1 changed files with 4 additions and 1 deletions
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5
transport-native-io_uring/src/main/java/io/netty/channel/uring/IOUringSubmissionQueue.java
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@ -137,7 +137,10 @@ final class IOUringSubmissionQueue {
}
// TODO: Make it configurable if we should use this flag or not.
PlatformDependent.putByte(sqe + SQE_FLAGS_FIELD, (byte) Native.IOSQE_ASYNC);
PlatformDependent.putByte(sqe + SQE_FLAGS_FIELD,
// Workaround for a kernel bug:
// See https://lore.kernel.org/io-uring/6428c1ee0234105d18c5e3e88aa00c57@nickhill.org/T/#t
(byte) (op != Native.IORING_OP_WRITEV ? Native.IOSQE_ASYNC : 0));
// pad field array -> all fields should be zero
long offsetIndex = 0;