| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 9 Jan 2015 13:30:31 -0600 From: Steve French <smfrench@...il.com> To: Christoph Hellwig <hch@...radead.org> Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-fsdevel <linux-fsdevel@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Milosz Tanski <milosz@...in.com> Subject: Re: pread2/ pwrite2 On Thu, Jan 8, 2015 at 5:49 AM, Christoph Hellwig <hch@...radead.org> wrote: > On Tue, Jan 06, 2015 at 12:47:14AM -0800, Andrew Morton wrote: >> > progress, which is a bit frustrating. >> >> I took a look at pread2() as well and I have two main issues: >> >> - The patchset includes a pwrite2() syscall which has nothing to do >> with nonblocking reads and which was poorly described and had little >> justification for inclusion. > > It allows to do O_SYNC writes on a per-I/O basis. This is very useful > for file servers (smb, cifs) as well as storage target devices. This would be particularly useful for SMB3 as the protocol now allows write-through vs. no-write-through flag on every write request (not just on an open, it can be changed on a particular i/o to write-through). There is also a cache/no-cache hint that can be sent on reads/writes in the newest SMB3 dialect well (but it is less clear to me how we would ever decide to set that on the Linux client). -- Thanks, Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists