From: Christoph Hellwig <hch@infradead.org>
To: David Howells <dhowells@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>,
Jens Axboe <axboe@kernel.dk>, Al Viro <viro@zeniv.linux.org.uk>,
Christoph Hellwig <hch@infradead.org>, Jan Kara <jack@suse.cz>,
Jeff Layton <jlayton@kernel.org>,
David Hildenbrand <david@redhat.com>,
Jason Gunthorpe <jgg@nvidia.com>,
Logan Gunthorpe <logang@deltatee.com>,
Hillf Danton <hdanton@sina.com>,
linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
syzbot+a440341a59e3b7142895@syzkaller.appspotmail.com,
Christoph Hellwig <hch@lst.de>,
John Hubbard <jhubbard@nvidia.com>
Subject: Re: [PATCH v14 01/12] splice: Fix O_DIRECT file read splice to avoid reversion of ITER_PIPE
Date: Mon, 13 Feb 2023 00:22:19 -0800 [thread overview]
Message-ID: <Y+nzO2H8AizX4lAQ@infradead.org> (raw)
In-Reply-To: <909202.1675959337@warthog.procyon.org.uk>
> + if (!bv)
> + return -ENOMEM;
> +
> + pages = (void *)(bv + npages);
I think this cast should be to struct page **… not void *.
> + npages = alloc_pages_bulk_array(GFP_USER, npages, pages);
> + if (!npages) {
> + kfree(bv);
> + return -ENOMEM;
> + }
> + reclaim = npages * PAGE_SIZE;
> + remain = 0;
> + if (ret > 0) {
> + reclaim -= ret;
> + remain = ret;
...
> + /* Free any pages that didn't get touched at all. */
> + reclaim /= PAGE_SIZE;
Any reason not to keep reclaim in PAGE_SIZE units to start with?
next prev parent reply other threads:[~2023-02-13 8:22 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-09 10:29 [PATCH v13 00/12] iov_iter: Improve page extraction (pin or just list) David Howells
2023-02-09 10:29 ` [PATCH v13 01/12] splice: Fix O_DIRECT file read splice to avoid reversion of ITER_PIPE David Howells
2023-02-09 14:53 ` Matthew Wilcox
2023-02-09 15:06 ` David Howells
2023-02-09 16:15 ` [PATCH v14 " David Howells
2023-02-13 8:22 ` Christoph Hellwig [this message]
2023-02-15 13:17 ` David Howells
2023-02-15 14:24 ` Christoph Hellwig
2023-02-15 15:56 ` David Howells
2023-02-15 13:42 ` [PATCH] splice: Clean up direct_splice_read() a bit David Howells
2023-02-15 13:47 ` David Howells
2023-02-09 10:29 ` [PATCH v13 02/12] mm: Pass info, not iter, into filemap_get_pages() and unstatic it David Howells
2023-02-13 8:22 ` Christoph Hellwig
2023-02-09 10:29 ` [PATCH v13 03/12] splice: Do splice read from a buffered file without using ITER_PIPE David Howells
2023-02-13 8:28 ` Christoph Hellwig
2023-02-13 10:11 ` David Howells
2023-02-13 10:18 ` Christoph Hellwig
2023-02-13 11:15 ` David Howells
2023-02-13 14:44 ` Christoph Hellwig
2023-02-13 18:06 ` Guenter Roeck
2023-02-13 22:43 ` David Howells
2023-02-13 22:51 ` Guenter Roeck
2023-02-13 23:12 ` David Howells
2023-02-13 23:25 ` Guenter Roeck
2023-02-09 10:29 ` [PATCH v13 04/12] iov_iter: Kill ITER_PIPE David Howells
2023-02-13 8:28 ` Christoph Hellwig
2023-02-09 10:29 ` [PATCH v13 05/12] iov_iter: Define flags to qualify page extraction David Howells
2023-02-09 10:29 ` [PATCH v13 06/12] iov_iter: Add a function to extract a page list from an iterator David Howells
2023-02-09 10:29 ` [PATCH v13 07/12] iomap: Don't get an reference on ZERO_PAGE for direct I/O block zeroing David Howells
2023-02-09 10:29 ` [PATCH v13 08/12] block: Fix bio_flagged() so that gcc can better optimise it David Howells
2023-02-09 10:29 ` [PATCH v13 09/12] block: Replace BIO_NO_PAGE_REF with BIO_PAGE_REFFED with inverted logic David Howells
2023-02-09 10:29 ` [PATCH v13 10/12] block: Add BIO_PAGE_PINNED and associated infrastructure David Howells
2023-02-09 10:29 ` [PATCH v13 11/12] block: Convert bio_iov_iter_get_pages to use iov_iter_extract_pages David Howells
2023-02-09 10:29 ` [PATCH v13 12/12] block: convert bio_map_user_iov " David Howells
2023-02-10 22:31 ` [PATCH v13 00/12] iov_iter: Improve page extraction (pin or just list) Jens Axboe
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