Re: [PATCH v3]Ext4: journal credits reservation fixes for DIO, fallocate and delalloc writepages

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On Fri, Aug 01, 2008 at 03:29:47PM -0400, Theodore Tso wrote:
> I'm noticing that when I reboot, presumably either just before or just
> after remounting the filesystem read-only, I'm getting a whole series
> of
> 
> ext4_da_writepages: Not enough credits to flush N pages
> 
> .. where N is mostly 1, but occasionally will be 2.
> 
> I'm not sure why this is happening; I did run sync before rebooting,
> and I haven't noticed any files written just before the reboot getting
> corrupted, but there is something strange happening here.

I instrumented the check, and it is returning an error -30 --- EROFS.

So it's not the fault journal credits patch, but I'm a bit concerned
why ext4_da_writepages is getting called right before the system is
rebooted, and presumably after the filesystem is remounted read/only.

							- Ted
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