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Old 10-11-2014, 02:32 AM   #1
kornelix
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Registered: Oct 2005
Location: Germany
Distribution: Ubuntu
Posts: 58

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error using O_DIRECT starting with kernel 3.16.0 (?)


I have a program that uses the following open() flags:
Code:
O_RDONLY+O_NOATIME+O_LARGEFILE+O_DIRECT
read() calls work OK until EOF is reached and then an EINVAL error is returned.

The buffer is aligned with the following call:
Code:
posix_memalign((void**) &vbuff,512,BIOCC);
The program runs OK if O_DIRECT is removed.
The program has been running for years on earlier kernel versions.

Is this a bug or an API change? Need guidance.

O_DIRECT is used because the file is being read to verify integrity shortly after it was written, so reading from the cache is not wanted.
This is part of a backup utility.
 
  


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