linux-kernel - Re: [PATCH 5/5] swiotlb: Free tbl memory in swiotlb

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Date:   Tue, 20 Jul 2021 09:35:31 +0100
From:   Will Deacon <will@...nel.org>
To:     Claire Chang <tientzu@...omium.org>
Cc:     "list@....net:IOMMU DRIVERS <iommu@...ts.linux-foundation.org>, Joerg
        Roedel <joro@...tes.org>," <iommu@...ts.linux-foundation.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Christoph Hellwig <hch@....de>,
        Robin Murphy <robin.murphy@....com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Nathan Chancellor <nathan@...nel.org>
Subject: Re: [PATCH 5/5] swiotlb: Free tbl memory in swiotlb_exit()

On Tue, Jul 20, 2021 at 11:36:19AM +0800, Claire Chang wrote:
> On Mon, Jul 19, 2021 at 8:31 PM Will Deacon <will@...nel.org> wrote:
> >
> > Although swiotlb_exit() frees the 'slots' metadata array referenced by
> > 'io_tlb_default_mem', it leaves the underlying buffer pages allocated
> > despite no longer being usable.
> >
> > Extend swiotlb_exit() to free the buffer pages as well as the slots
> > array.
> >
> > Cc: Claire Chang <tientzu@...omium.org>
> > Cc: Christoph Hellwig <hch@....de>
> > Cc: Robin Murphy <robin.murphy@....com>
> > Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> > Tested-by: Nathan Chancellor <nathan@...nel.org>
> 
> Tested-by: Claire Chang <tientzu@...omium.org>

Thanks, Claire!

Will