On 1/4/12 1:22 PM, Eric Sandeen wrote:
> 275 was failing on ext4 because it doesn't reliably write
> until ENOSPC due to delalloc and crummy ENOSPC handling.
> So the attempts to fill the fs would fail, and this test,
> which was expecting to have exactly 4k free for the last write
> attempt, failed as well, because it was able to write more than
> the expected 4k.
Grr self-NAK this makes it fail on xfs (?!)
-Eric
> Change a few things:
>
> * Tidy up test description & comments
> * Keep files on scratch mount for failure analysis
> * Add a couple syncs here and there to push out delalloc
> * Make a last-ditch effort to fill fs via direct IO
> * Provide a little more detail on failure
>
> With this change I can pass the test on ext4.
>
> Fixing ext4's ENOSPC handling is probably another bug, but by
> working really hard to fill an ext4 fs, this test can achieve
> its specific goal.
>
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
> ---
>
> diff --git a/275 b/275
> index 214262e..3ebeabe 100755
> --- a/275
> +++ b/275
> @@ -1,8 +1,8 @@
> #! /bin/bash
> # FS QA Test No. 275
> #
> -# The posix write test. when write size is larger than disk free size,
> -# should write as more as possible
> +# The posix write test. When write size is larger than disk free size,
> +# should write as much as possible until ENOSPC.
> #
> #-----------------------------------------------------------------------
> # Copyright (c) 2011-2012 Fujitsu, Inc. All Rights Reserved.
> @@ -36,7 +36,6 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
> _cleanup()
> {
> cd /
> - rm -f $SCRATCH_MNT/* $tmp.*
> _scratch_unmount
> }
>
> @@ -49,7 +48,7 @@ _supported_os IRIX Linux
> _require_scratch
>
> echo "------------------------------"
> -echo "write lack test"
> +echo "write until ENOSPC test"
> echo "------------------------------"
>
> rm -f $seq.full
> @@ -69,10 +68,15 @@ then
> exit
> fi
>
> +# Attempt to completely fill fs
> dd if=/dev/zero of=tmp2 bs=1M >/dev/null 2>&1
> +sync
> dd if=/dev/zero of=tmp3 bs=4K >/dev/null 2>&1
> sync
> +# Last effort, use O_DIRECT to defeat delalloc
> +dd if=/dev/zero of=tmp4 bs=4K oflag=direct >/dev/null 2>&1
>
> +# Should leave exactly 4k free
> rm -f tmp1
> sync
>
> @@ -80,7 +84,7 @@ dd if=/dev/zero of=tmp1 bs=8K count=1 >/dev/null 2>&1
> _filesize=`du tmp1 | awk '{print $1}'`
> if [ $_filesize -ne 4 ]
> then
> - echo "write file err"
> + echo "write file err: wrote $_filesize kbytes not 4 kbytes"
> status=1
> exit
> fi
> diff --git a/275.out b/275.out
> index 30af43c..69b9d52 100644
> --- a/275.out
> +++ b/275.out
> @@ -1,5 +1,5 @@
> QA output created by 275
> ------------------------------
> -write lack test
> +write until ENOSPC test
> ------------------------------
> done
>
> --
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