Re: [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector()... | netdev

let import_iovec deal with compat_iovecs as well v2 · Christoph Hellwig <hch@lst.de> · 2020-09-21
[PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw() · Christoph Hellwig <hch@lst.de> · 2020-09-21
Re: [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw() · Matthew Wilcox <willy@infradead.org> · 2020-09-21
Re: [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw() · Al Viro <viro@zeniv.linux.org.uk> · 2020-09-21
RE: [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw() · David Laight <hidden> · 2020-09-21
Re: [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw() · Al Viro <viro@zeniv.linux.org.uk> · 2020-09-21
RE: [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw() · David Laight <hidden> · 2020-09-21
Re: [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw() · Al Viro <viro@zeniv.linux.org.uk> · 2020-09-21
Re: [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw() · Christoph Hellwig <hch@lst.de> · 2020-09-21
[PATCH 10/11] mm: remove compat_process_vm_{readv,writev} · Christoph Hellwig <hch@lst.de> · 2020-09-21
[PATCH 07/11] fs: remove various compat readv/writev helpers · Christoph Hellwig <hch@lst.de> · 2020-09-21
[PATCH 09/11] fs: remove compat_sys_vmsplice · Christoph Hellwig <hch@lst.de> · 2020-09-21
[PATCH 11/11] security/keys: remove compat_keyctl_instantiate_key_iov · Christoph Hellwig <hch@lst.de> · 2020-09-21
[PATCH 08/11] fs: remove the compat readv/writev syscalls · Christoph Hellwig <hch@lst.de> · 2020-09-21
[PATCH 05/11] iov_iter: merge the compat case into rw_copy_check_uvector · Christoph Hellwig <hch@lst.de> · 2020-09-21
Re: [PATCH 05/11] iov_iter: merge the compat case into rw_copy_check_uvector · Al Viro <viro@zeniv.linux.org.uk> · 2020-09-21
RE: [PATCH 05/11] iov_iter: merge the compat case into rw_copy_check_uvector · David Laight <hidden> · 2021-01-08
[PATCH 04/11] iov_iter: explicitly check for CHECK_IOVEC_ONLY in rw_copy_check_uvector · Christoph Hellwig <hch@lst.de> · 2020-09-21
RE: [PATCH 04/11] iov_iter: explicitly check for CHECK_IOVEC_ONLY in rw_copy_check_uvector · David Laight <hidden> · 2020-09-21
Re: [PATCH 04/11] iov_iter: explicitly check for CHECK_IOVEC_ONLY in rw_copy_check_uvector · Al Viro <viro@zeniv.linux.org.uk> · 2020-09-21
RE: [PATCH 04/11] iov_iter: explicitly check for CHECK_IOVEC_ONLY in rw_copy_check_uvector · David Laight <hidden> · 2020-09-21
Re: [PATCH 04/11] iov_iter: explicitly check for CHECK_IOVEC_ONLY in rw_copy_check_uvector · Al Viro <viro@zeniv.linux.org.uk> · 2020-09-21
[PATCH 06/11] iov_iter: handle the compat case in import_iovec · Christoph Hellwig <hch@lst.de> · 2020-09-21
Re: [PATCH 06/11] iov_iter: handle the compat case in import_iovec · Al Viro <viro@zeniv.linux.org.uk> · 2020-09-21
[PATCH 01/11] compat.h: fix a spelling error in <linux/compat.h> · Christoph Hellwig <hch@lst.de> · 2020-09-21
[PATCH 03/11] iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c and mark it static · Christoph Hellwig <hch@lst.de> · 2020-09-21

Re: [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw()

From: Christoph Hellwig <hch@lst.de>
Date: 2020-09-21 16:12:39
Also in: io-uring, keyrings, linux-arch, linux-arm-kernel, linux-block, linux-fsdevel, linux-mips, linux-mm, linux-s390, linux-scsi, linux-security-module, linuxppc-dev, lkml, sparclinux

On Mon, Sep 21, 2020 at 04:29:37PM +0100, Al Viro wrote:

On Mon, Sep 21, 2020 at 03:21:35PM +0000, David Laight wrote:

quoted

You really don't want to be looping through the array twice.

Profiles, please.

Given that the iov array should be cache hot I'd be surprised to
see a huge difference.

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