linux-kernel - Re: [PATCH 5/6] shmem: add file length in shmem_get

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Date:   Fri, 15 Sep 2023 16:37:14 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Daniel Gomez <da.gomez@...sung.com>
Cc:     "minchan@...nel.org" <minchan@...nel.org>,
        "senozhatsky@...omium.org" <senozhatsky@...omium.org>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "djwong@...nel.org" <djwong@...nel.org>,
        "hughd@...gle.com" <hughd@...gle.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "mcgrof@...nel.org" <mcgrof@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-xfs@...r.kernel.org" <linux-xfs@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "gost.dev@...sung.com" <gost.dev@...sung.com>,
        Pankaj Raghav <p.raghav@...sung.com>
Subject: Re: [PATCH 5/6] shmem: add file length in shmem_get_folio path

On Fri, Sep 15, 2023 at 09:51:29AM +0000, Daniel Gomez wrote:
> @@ -2251,7 +2252,7 @@ static vm_fault_t shmem_fault(struct vm_fault *vmf)
>  	}
>  
>  	err = shmem_get_folio_gfp(inode, vmf->pgoff, &folio, SGP_CACHE,
> -				  gfp, vma, vmf, &ret);
> +				  gfp, vma, vmf, &ret, i_size_read(inode));

Surely this should be PAGE_SIZE not i_size?

> @@ -4923,7 +4927,7 @@ struct folio *shmem_read_folio_gfp(struct address_space *mapping,
>  
>  	BUG_ON(!shmem_mapping(mapping));
>  	error = shmem_get_folio_gfp(inode, index, &folio, SGP_CACHE,
> -				  gfp, NULL, NULL, NULL);
> +				  gfp, NULL, NULL, NULL, i_size_read(inode));

Same here?