Re: Ext4: Buffered random writes performance regression with dioread_nolock enabled

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On 22/09/19 04:18PM, hazem ahmed mohamed wrote:
> Hey Team,
> 
> 
> 
> I am sending this e-mail to report a performance regression that’s
> caused by commit 244adf6426(ext4: make dioread_nolock the default) , I
> am listing the performance regression symptoms below & our analysis
> for the reported regression.
> 

Although you did mention you already tested on the latest kernel too and there
too you saw a similar performance regression.
But no harm in also double checking if you have this patch [1]. 
This does fixes a similar problem AFAIU.


[1]: https://lore.kernel.org/linux-ext4/20200520133119.1383-1-jack@xxxxxxx/

-ritesh



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