linux-kernel - Re: [PATCH v2 14/14] md/raid1,raid10: fall back to smaller order if sync folio alloc fails

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Message-ID: <23035df1-d550-ee86-337c-e43847712e3c@huaweicloud.com>
Date: Thu, 5 Feb 2026 15:29:50 +0800
From: Li Nan <linan666@...weicloud.com>
To: yukuai@...as.com, linan666@...weicloud.com, song@...nel.org
Cc: xni@...hat.com, linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
 yangerkun@...wei.com, yi.zhang@...wei.com
Subject: Re: [PATCH v2 14/14] md/raid1,raid10: fall back to smaller order if
 sync folio alloc fails



在 2026/2/5 0:48, Yu Kuai 写道:
> Hi,
> 
> 在 2026/1/28 15:57, linan666@...weicloud.com 写道:
>> From: Li Nan <linan122@...wei.com>
>>
>> RESYNC_BLOCK_SIZE (64K) has higher allocation failure chance than 4k,
>> so retry with lower orders to improve allocation reliability.
>>
>> A r1/10_bio may have different rf->folio orders. Use minimum order as
>> r1/10_bio sectors to prevent exceeding size when adding folio to IO later.
>>
>> Signed-off-by: Li Nan <linan122@...wei.com>
>> ---
>>    drivers/md/raid1-10.c | 14 +++++++++++---
>>    drivers/md/raid1.c    | 13 +++++++++----
>>    drivers/md/raid10.c   | 28 ++++++++++++++++++++++++++--
>>    3 files changed, 46 insertions(+), 9 deletions(-)
> 
> Looks like this patch should be merged into patch 5, there is no need to introduce
> that higher allocation failure and then fix it here.
> 

OK, I will merge abouve patches.

-- 
Thanks,
Nan