From: Al Viro <viro@ZenIV.linux.org.uk>
To: Jeff Layton <jlayton@poochiereds.net>
Cc: linux-cifs@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/6] cifs: quit playing games with draining iovecs
Date: Tue, 19 Apr 2016 23:41:36 +0100 [thread overview]
Message-ID: <20160419224136.GD25498@ZenIV.linux.org.uk> (raw)
In-Reply-To: <1461088397.15135.9.camel@poochiereds.net>
On Tue, Apr 19, 2016 at 01:53:17PM -0400, Jeff Layton wrote:
> What's the advantage of using iov_iter_bvec over iov_iter_kvec ?
No need to screw with kmap() in the caller; moreover, when it comes to actual
copying it gets away with kmap_atomic() just around the memcpy(), which is
considerably cheaper.
next prev parent reply other threads:[~2016-04-19 22:41 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-09 20:43 [RFC][PATCHSET] reduce messing with iovecs in cifs Al Viro
2016-04-09 20:43 ` Al Viro
2016-04-09 20:50 ` [PATCH 2/6] cifs: merge the hash calculation helpers Al Viro
[not found] ` <20160409205056.GH25498-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2016-04-13 5:07 ` Shirish Pargaonkar
2016-04-13 5:07 ` Shirish Pargaonkar
2016-04-19 16:12 ` Jeff Layton
[not found] ` <20160409204301.GF25498-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2016-04-09 20:50 ` [PATCH 1/6] [net] drop 'size' argument of sock_recvmsg() Al Viro
2016-04-09 20:50 ` Al Viro
[not found] ` <20160409205029.GG25498-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2016-04-19 16:03 ` Jeff Layton
2016-04-19 16:03 ` Jeff Layton
2016-04-09 20:51 ` [PATCH 3/6] cifs: quit playing games with draining iovecs Al Viro
2016-04-09 20:51 ` Al Viro
[not found] ` <20160409205129.GI25498-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2016-04-19 17:53 ` Jeff Layton
2016-04-19 17:53 ` Jeff Layton
2016-04-19 22:41 ` Al Viro [this message]
2016-04-09 20:52 ` [PATCH 4/6] cifs: no need to wank with copying and advancing iovec on recvmsg side either Al Viro
2016-04-09 20:52 ` Al Viro
[not found] ` <20160409205210.GJ25498-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2016-04-19 17:55 ` Jeff Layton
2016-04-19 17:55 ` Jeff Layton
2016-04-09 20:52 ` [PATCH 5/6] cifs_readv_receive: use cifs_read_from_socket() Al Viro
2016-04-09 20:52 ` Al Viro
[not found] ` <20160409205236.GK25498-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2016-04-19 15:01 ` Jeff Layton
2016-04-19 15:01 ` Jeff Layton
2016-04-09 20:53 ` [PATCH 6/6] cifs: don't bother with kmap on read_pages side Al Viro
2016-04-09 20:53 ` Al Viro
[not found] ` <20160409205304.GL25498-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2016-04-19 18:24 ` Jeff Layton
2016-04-19 18:24 ` Jeff Layton
2016-04-11 2:43 ` [RFC][PATCHSET] reduce messing with iovecs in cifs Shirish Pargaonkar
2016-04-11 2:43 ` Shirish Pargaonkar
2016-04-25 3:22 ` Steve French
2016-04-25 3:22 ` Steve French
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