linux-kernel - Re: [PATCH] btrfs: wait between incomplete batch allocations

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Message-ID: <20220407145221.GF15609@twin.jikos.cz>
Date:   Thu, 7 Apr 2022 16:52:21 +0200
From:   David Sterba <dsterba@...e.cz>
To:     Sweet Tea Dorminy <sweettea-kernel@...miny.me>
Cc:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>, linux-kernel@...r.kernel.org,
        linux-btrfs@...r.kernel.org, kernel-team@...com,
        David Sterba <dsterba@...e.cz>
Subject: Re: [PATCH] btrfs: wait between incomplete batch allocations

On Wed, Apr 06, 2022 at 02:24:18PM -0400, Sweet Tea Dorminy wrote:
> When allocating memory in a loop, each iteration should call
> memalloc_retry_wait() in order to prevent starving memory-freeing
> processes (and to mark where allcoation loops are). ext4, f2fs, and xfs
> all use this function at present for their allocation loops; btrfs ought
> also.
> 
> The bulk page allocation is the only place in btrfs with an allocation
> retry loop, so add an appropriate call to it.
> 
> Suggested-by: David Sterba <dsterba@...e.cz>
> Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@...miny.me>

Added to misc-next, thanks.