linux-kernel - Re: [PATCH-next RESEND v2] lib: parser: optimize match

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Message-ID: <Y8mUEL3VrizxFika@slm.duckdns.org>
Date:   Thu, 19 Jan 2023 09:03:44 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Li Lingfeng <lilingfeng3@...wei.com>
Cc:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        jack@...e.cz, bingjingc@...ology.com, ebiggers@...gle.com,
        james.smart@...adcom.com, houtao1@...wei.com, yi.zhang@...wei.com,
        yangerkun@...wei.com, yukuai3@...wei.com
Subject: Re: [PATCH-next RESEND v2] lib: parser: optimize match_NUMER apis to
 use local array

On Wed, Jan 11, 2023 at 12:22:15PM +0800, Li Lingfeng wrote:
> Memory will be allocated to store substring_t in match_strdup(), which means
> the caller of match_strdup() may need to be scheduled out to wait for reclaiming
> memory.
> 
> Using local array to store substring_t to remove the restriction.
> 
> Link: https://lore.kernel.org/all/20221104023938.2346986-5-yukuai1@huaweicloud.com/
> Signed-off-by: Li Lingfeng <lilingfeng3@...wei.com>
> Acked-by: Tejun Heo <tj@...nel.org>

This will fix a sleep-in-atomic in #linus, so it'd be great if we can get it
merged. Can you please apply the suggested changes and repost? I think we
can route this through block too as the current breakage is there. So,
please cc Jens too.

Thanks.

-- 
tejun