generic/471 regression with async buffered writes?
Subsystems (3)
Hi everyone,
I noticed the following fstest failure on XFS on 6.0-rc1 that wasn't there in 5.19:
471.out.bad renamed from 471.out +3 -5
@@ -2,12 +2,10 @@ pwrite: Resource temporarily unavailable wrote 8388608/8388608 bytes at offset 0 XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) -RWF_NOWAIT time is within limits. +pwrite: Resource temporarily unavailable +(standard_in) 1: syntax error +RWF_NOWAIT took seconds 00000000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ * -00200000: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ -* -00300000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ -* read 8388608/8388608 bytes at offset 0 XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Is this related to the async buffered write changes, or should I keep looking? AFAICT nobody else has mentioned problems with 471...
--D
Jens Axboe
maintainerQuoted 24 lines · Darrick J. Wong
Hi everyone,
I noticed the following fstest failure on XFS on 6.0-rc1 that wasn't there in 5.19:
471.out.bad renamed from 471.out +3
-5@@ -2,12 +2,10 @@ pwrite: Resource temporarily unavailable wrote 8388608/8388608 bytes at offset 0 XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) -RWF_NOWAIT time is within limits. +pwrite: Resource temporarily unavailable +(standard_in) 1: syntax error +RWF_NOWAIT took seconds 00000000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ * -00200000: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ -* -00300000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ -* read 8388608/8388608 bytes at offset 0 XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Quoted 2 lines
Is this related to the async buffered write changes, or should I keep looking? AFAICT nobody else has mentioned problems with 471...
The test is just broken. It made some odd assumptions on what RWF_NOWAIT means with buffered writes. There's been a discussion on it previously, I'll see if I can find the links. IIRC, the tldr is that the test doesn't really tie RWF_NOWAIT to whether we'll block or not.
Signature · 1 line
Jens Axboe