linux-kernel - Re: [f2fs-dev] [PATCH v2] f2fs: handle decompress only post processing in softirq

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Message-ID: <0d33f658-a678-530d-0377-1ee6af091309@kernel.org>
Date:   Thu, 4 Aug 2022 21:19:20 +0800
From:   Chao Yu <chao@...nel.org>
To:     Daeho Jeong <daeho43@...il.com>, linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com
Cc:     Daeho Jeong <daehojeong@...gle.com>
Subject: Re: [f2fs-dev] [PATCH v2] f2fs: handle decompress only post
 processing in softirq

On 2022/8/3 3:24, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@...gle.com>
> 
> Now decompression is being handled in workqueue and it makes read I/O
> latency non-deterministic, because of the non-deterministic scheduling
> nature of workqueues. So, I made it handled in softirq context only if
> possible, not in low memory devices, since this modification will
> maintain decompresion related memory a little longer.
> ---
> v1: fixed build errors reported by kernel test robot <lkp@...el.com>
> v2: enhanced readability and removed a redundant code
> 
> Signed-off-by: Daeho Jeong <daehojeong@...gle.com>

Reviewed-by: Chao Yu <chao@...nel.org>

Thanks,