linux-kernel - Re: [PATCH v3] f2fs: allow to change discard policy based on cached discard cmds

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Message-ID: <YF03JuWi9bYL11e6@google.com>
Date:   Thu, 25 Mar 2021 18:21:42 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Sahitya Tummala <stummala@...eaurora.org>
Cc:     Chao Yu <yuchao0@...wei.com>,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] f2fs: allow to change discard policy based on cached
 discard cmds

On 03/26, Sahitya Tummala wrote:
> Hi Jaegeuk,
> 
> This latest v3 patch needs to be updated in f2fs tree.
> The f2fs tree currently points to older version of patch.
> 
> Please make a note of it.

Ha, need more coffee. Thanks for pointing it out. :)

> 
> Thanks,
> Sahitya.
> 
> On Tue, Mar 16, 2021 at 07:08:58PM +0800, Chao Yu wrote:
> > On 2021/3/16 17:29, Sahitya Tummala wrote:
> > >With the default DPOLICY_BG discard thread is ioaware, which prevents
> > >the discard thread from issuing the discard commands. On low RAM setups,
> > >it is observed that these discard commands in the cache are consuming
> > >high memory. This patch aims to relax the memory pressure on the system
> > >due to f2fs pending discard cmds by changing the policy to DPOLICY_FORCE
> > >based on the nm_i->ram_thresh configured.
> > >
> > >Signed-off-by: Sahitya Tummala <stummala@...eaurora.org>
> > 
> > Reviewed-by: Chao Yu <yuchao0@...wei.com>
> > 
> > Thanks,
> 
> -- 
> --
> Sent by a consultant of the Qualcomm Innovation Center, Inc.
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.