From: Matthew Wilcox <matthew.r.wilcox@intel.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Matthew Wilcox <willy@linux.intel.com>
Subject: [PATCH v2 2/6] dax: Use copy_from_iter_nocache
Date: Fri, 3 Jul 2015 10:40:39 -0400 [thread overview]
Message-ID: <1435934443-17090-3-git-send-email-matthew.r.wilcox@intel.com> (raw)
In-Reply-To: <1435934443-17090-1-git-send-email-matthew.r.wilcox@intel.com>
From: Matthew Wilcox <willy@linux.intel.com>
When userspace does a write, there's no need for the written data to
pollute the CPU cache. This matches the original XIP code.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
fs/dax.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/dax.c b/fs/dax.c
index 99b5fbc..eaa9e06 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -155,7 +155,7 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
}
if (iov_iter_rw(iter) == WRITE)
- len = copy_from_iter(addr, max - pos, iter);
+ len = copy_from_iter_nocache(addr, max - pos, iter);
else if (!hole)
len = copy_to_iter(addr, max - pos, iter);
else
--
2.1.4
next prev parent reply other threads:[~2015-07-03 14:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-03 14:40 [PATCH v2 0/6] Miscellaneous DAX patches, take 2 Matthew Wilcox
2015-07-03 14:40 ` [PATCH v2 1/6] dax: Add block size note to documentation Matthew Wilcox
2015-07-04 5:03 ` Christoph Hellwig
2015-07-05 8:43 ` Boaz Harrosh
2015-07-03 14:40 ` Matthew Wilcox [this message]
2015-07-05 13:11 ` [PATCH v2 2/6] dax: Use copy_from_iter_nocache Boaz Harrosh
2015-07-03 14:40 ` [PATCH v2 3/6] ext4: Use ext4_get_block_write() for DAX Matthew Wilcox
2015-07-03 18:30 ` Theodore Ts'o
2015-07-03 18:48 ` Matthew Wilcox
2015-07-03 19:07 ` Theodore Ts'o
2015-07-05 13:29 ` Boaz Harrosh
2015-07-03 14:40 ` [PATCH v2 4/6] vfs: Allow truncate, chomd and chown to be interrupted by fatal signals Matthew Wilcox
2015-07-03 14:40 ` [PATCH v2 5/6] block: Add support for DAX reads/writes to block devices Matthew Wilcox
2015-07-05 13:47 ` Boaz Harrosh
2015-07-03 14:40 ` [PATCH v2 6/6] dax: bdev_direct_access() may sleep Matthew Wilcox
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1435934443-17090-3-git-send-email-matthew.r.wilcox@intel.com \
--to=matthew.r.wilcox@intel.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=viro@zeniv.linux.org.uk \
--cc=willy@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.