linux-kernel - Re: [PATCH v2] scsi: use GFP_NOIO to avoid circular locking dependency

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Message-ID: <173863996275.4118719.4750343805511377444.b4-ty@oracle.com>
Date: Mon,  3 Feb 2025 22:33:08 -0500
From: "Martin K. Petersen" <martin.petersen@...cle.com>
To: Christoph Hellwig <hch@...radead.org>, Rik van Riel <riel@...riel.com>
Cc: "Martin K . Petersen" <martin.petersen@...cle.com>,
        Marc Aur èle La France <tsi@...oix.net>,
        "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...a.com
Subject: Re: [PATCH v2] scsi: use GFP_NOIO to avoid circular locking dependency

On Wed, 29 Jan 2025 10:45:25 -0500, Rik van Riel wrote:

> MIME-Version: 1.0
> Content-Type: text/plain; charset=UTF-8
> Content-Transfer-Encoding: 8bit
> 
> Filesystems can write to disk from page reclaim with __GFP_FS
> set. Marc found a case where scsi_realloc_sdev_budget_map
> ends up in page reclaim with GFP_KERNEL, where it could try
> to take filesystem locks again, leading to a deadlock.
> 
> [...]

Applied to 6.14/scsi-fixes, thanks!

[1/1] scsi: use GFP_NOIO to avoid circular locking dependency
      https://git.kernel.org/mkp/scsi/c/5363ee9d110e

-- 
Martin K. Petersen	Oracle Linux Engineering