Re: [PATCH] dio: falling through to buffered I/O when invalidationof a page fails

At 04:15 07/12/15, Zach Brown wrote:
>
>> If anyone has a testcase - I can take a look at the problem again.
>
>I can try and throw something together..
>
>- z

I did a test by using fsstress.

I modified the dio write() of fsstress to check return value, and input
following command;

# fsstress -d /root/testdir/ -l 0 -n 1000 -p 1000 -z -f creat=1 -f write=1 -f dwrite=1

I got EIO from dio write.

I encountered some PostgreSQL mailing list archive that mentioned about this issue.

http://groups.google.com/group/pgsql.hackers/browse_thread/thread/c7515ccd5ac1269c/dc2ddeac3fe0d8c1?lnk=raot&fwc=1

dio can be used in PostgreSQL to write transaction log(WAL). It is said that when dio is used,

EIO is returned under some workload.

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---

• References:
  • [PATCH] dio: falling through to buffered I/O when invalidation of a page fails
    • From: Hisashi Hifumi <[email protected]>
  • Re: [PATCH] dio: falling through to buffered I/O when invalidation of a page fails
    • From: Zach Brown <[email protected]>
  • Re: [PATCH] dio: falling through to buffered I/O when invalidation of a page fails
    • From: Badari Pulavarty <[email protected]>
  • Re: [PATCH] dio: falling through to buffered I/O when invalidation of a page fails
    • From: Zach Brown <[email protected]>

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