From: Linus Torvalds <torvalds@linux-foundation.org>
To: David Howells <dhowells@redhat.com>
Cc: Tong Tiangen <tongtiangen@huawei.com>, Al Viro <viro@kernel.org>,
Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@lst.de>,
Christian Brauner <christian@brauner.io>,
David Laight <David.Laight@aculab.com>,
Matthew Wilcox <willy@infradead.org>,
Jeff Layton <jlayton@kernel.org>,
linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
linux-mm@kvack.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: Re: [bug report] dead loop in generic_perform_write() //Re: [PATCH v7 07/12] iov_iter: Convert iterate*() to inline funcs
Date: Mon, 4 Mar 2024 10:32:25 -0800 [thread overview]
Message-ID: <CAHk-=wgrmt875HJNUY9a-ti0M6M1m6jHEGvCSjcOfXy_E7_X_w@mail.gmail.com> (raw)
In-Reply-To: <769021.1709553367@warthog.procyon.org.uk>
On Mon, 4 Mar 2024 at 03:56, David Howells <dhowells@redhat.com> wrote:
>
> That said, I wonder if:
>
> #ifdef copy_mc_to_kernel
>
> should be:
>
> #ifdef CONFIG_ARCH_HAS_COPY_MC
Hmm. Maybe. We do have that
#ifdef copy_mc_to_kernel
pattern already in <linux/uaccess.h>, so clearly we've done it both ways.
I personally like the "just test for the thing you are using" model,
which is then why I did it that way, but I don't have hugely strong
opinions on it.
> and whether it's possible to find out dynamically if MCEs can occur at all.
I really wanted to do something like that, and look at the source page
to decide "is this a pmem page that can cause machine checks", but I
didn't find any obvious way to do that.
Improvement suggestions more than welcome.
Linus
next prev parent reply other threads:[~2024-03-04 18:32 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-25 12:02 [PATCH v7 00/12] iov_iter: Convert the iterator macros into " David Howells
2023-09-25 12:02 ` [PATCH v7 01/12] iov_iter: Remove last_offset from iov_iter as it was for ITER_PIPE David Howells
2023-09-25 12:02 ` [PATCH v7 02/12] iov_iter, x86: Be consistent about the __user tag on copy_mc_to_user() David Howells
2023-09-28 14:47 ` Borislav Petkov
2023-09-25 12:03 ` [PATCH v7 03/12] sound: Fix snd_pcm_readv()/writev() to use iov access functions David Howells
2023-09-25 12:03 ` [PATCH v7 04/12] infiniband: Use user_backed_iter() to see if iterator is UBUF/IOVEC David Howells
2023-09-25 12:03 ` [PATCH v7 05/12] iov_iter: Renumber ITER_* constants David Howells
2023-09-25 12:03 ` [PATCH v7 06/12] iov_iter: Derive user-backedness from the iterator type David Howells
2023-09-25 12:03 ` [PATCH v7 07/12] iov_iter: Convert iterate*() to inline funcs David Howells
2024-02-18 3:13 ` [bug report] dead loop in generic_perform_write() //Re: " Tong Tiangen
2024-02-27 12:43 ` Tong Tiangen
2024-02-28 21:21 ` Linus Torvalds
2024-02-28 22:57 ` Linus Torvalds
2024-02-29 8:13 ` Tong Tiangen
2024-02-29 17:32 ` Linus Torvalds
2024-03-01 2:13 ` Tong Tiangen
2024-03-02 2:59 ` Linus Torvalds
2024-03-02 9:37 ` Tong Tiangen
2024-03-02 18:06 ` Linus Torvalds
2024-03-02 18:11 ` Linus Torvalds
2024-03-04 8:45 ` Tong Tiangen
2024-03-04 11:56 ` David Howells
2024-03-04 12:15 ` Tong Tiangen
2024-03-04 18:32 ` Linus Torvalds [this message]
2024-03-05 6:57 ` Tong Tiangen
2023-09-25 12:03 ` [PATCH v7 08/12] iov_iter: Don't deal with iter->copy_mc in memcpy_from_iter_mc() David Howells
2023-09-25 12:03 ` [PATCH v7 09/12] iov_iter, net: Move csum_and_copy_to/from_iter() to net/ David Howells
2023-09-25 12:03 ` [PATCH v7 10/12] iov_iter, net: Fold in csum_and_memcpy() David Howells
2023-09-25 12:03 ` [PATCH v7 11/12] iov_iter, net: Merge csum_and_copy_from_iter{,_full}() together David Howells
2023-09-25 12:03 ` [PATCH v7 12/12] iov_iter, net: Move hash_and_copy_to_iter() to net/ David Howells
2023-09-25 12:34 ` [PATCH v7 00/12] iov_iter: Convert the iterator macros into inline funcs Christian Brauner
2023-10-02 9:25 ` [PATCH v7 08/12] iov_iter: Don't deal with iter->copy_mc in memcpy_from_iter_mc() David Howells
2023-10-07 4:32 ` [PATCH next] iov_iter: fix copy_page_from_iter_atomic() Hugh Dickins
2023-10-07 7:29 ` David Howells
2023-10-09 7:36 ` Christian Brauner
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