From: Dave Kleikamp <dave.kleikamp@oracle.com>
To: linux-kernel@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
"Maxim V. Patlasov" <mpatlasov@parallels.com>,
Zach Brown <zab@zabbo.net>,
Dave Kleikamp <dave.kleikamp@oracle.com>
Subject: [PATCH V8 02/33] iov_iter: iov_iter_copy_from_user() should use non-atomic copy
Date: Thu, 25 Jul 2013 12:50:28 -0500 [thread overview]
Message-ID: <1374774659-13121-3-git-send-email-dave.kleikamp@oracle.com> (raw)
In-Reply-To: <1374774659-13121-1-git-send-email-dave.kleikamp@oracle.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
---
fs/iov-iter.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/fs/iov-iter.c b/fs/iov-iter.c
index 52c23d9..563a6ba 100644
--- a/fs/iov-iter.c
+++ b/fs/iov-iter.c
@@ -6,8 +6,8 @@
#include <linux/highmem.h>
#include <linux/pagemap.h>
-static size_t __iovec_copy_from_user_inatomic(char *vaddr,
- const struct iovec *iov, size_t base, size_t bytes)
+static size_t __iovec_copy_from_user(char *vaddr, const struct iovec *iov,
+ size_t base, size_t bytes, int atomic)
{
size_t copied = 0, left = 0;
@@ -16,7 +16,10 @@ static size_t __iovec_copy_from_user_inatomic(char *vaddr,
int copy = min(bytes, iov->iov_len - base);
base = 0;
- left = __copy_from_user_inatomic(vaddr, buf, copy);
+ if (atomic)
+ left = __copy_from_user_inatomic(vaddr, buf, copy);
+ else
+ left = __copy_from_user(vaddr, buf, copy);
copied += copy;
bytes -= copy;
vaddr += copy;
@@ -47,8 +50,8 @@ size_t iov_iter_copy_from_user_atomic(struct page *page,
left = __copy_from_user_inatomic(kaddr + offset, buf, bytes);
copied = bytes - left;
} else {
- copied = __iovec_copy_from_user_inatomic(kaddr + offset,
- i->iov, i->iov_offset, bytes);
+ copied = __iovec_copy_from_user(kaddr + offset, i->iov,
+ i->iov_offset, bytes, 1);
}
kunmap_atomic(kaddr);
@@ -75,8 +78,8 @@ size_t iov_iter_copy_from_user(struct page *page,
left = __copy_from_user(kaddr + offset, buf, bytes);
copied = bytes - left;
} else {
- copied = __iovec_copy_from_user_inatomic(kaddr + offset,
- i->iov, i->iov_offset, bytes);
+ copied = __iovec_copy_from_user(kaddr + offset, i->iov,
+ i->iov_offset, bytes, 0);
}
kunmap(page);
return copied;
--
1.8.3.4
next prev parent reply other threads:[~2013-07-25 17:50 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-25 17:50 [PATCH V8 00/33] loop: Issue O_DIRECT aio using bio_vec Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 01/33] iov_iter: move into its own file Dave Kleikamp
2013-07-25 17:50 ` Dave Kleikamp [this message]
2013-07-25 17:50 ` [PATCH V8 03/33] iov_iter: add copy_to_user support Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 04/33] iov_iter: add __iovec_copy_to_user() Dave Kleikamp
[not found] ` <1374774659-13121-1-git-send-email-dave.kleikamp-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2013-07-25 17:50 ` [PATCH V8 05/33] fuse: convert fuse to use iov_iter_copy_[to|from]_user Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 06/33] iov_iter: hide iovec details behind ops function pointers Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 07/33] iov_iter: ii_iovec_copy_to_user should pre-fault user pages Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 08/33] iov_iter: add bvec support Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 09/33] iov_iter: add a shorten call Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 10/33] iov_iter: let callers extract iovecs and bio_vecs Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 11/33] dio: Convert direct_IO to use iov_iter Dave Kleikamp
2013-08-23 15:48 ` Geert Uytterhoeven
2013-07-25 17:50 ` [PATCH V8 12/33] dio: add bio_vec support to __blockdev_direct_IO() Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 13/33] fs: pull iov_iter use higher up the stack Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 14/33] aio: add aio_kernel_() interface Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 15/33] aio: add aio support for iov_iter arguments Dave Kleikamp
2013-08-21 13:55 ` Benjamin LaHaise
2013-08-30 20:05 ` Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 16/33] bio: add bvec_length(), like iov_length() Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 17/33] loop: use aio to perform io on the underlying file Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 18/33] fs: create file_readable() and file_writable() functions Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 19/33] fs: use read_iter and write_iter rather than aio_read and aio_write Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 20/33] fs: add read_iter and write_iter to several file systems Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 21/33] ocfs2: add support for read_iter and write_iter Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 22/33] ext4: " Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 23/33] nfs: add support for read_iter, write_iter Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 24/33] nfs: simplify swap Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 25/33] btrfs: add support for read_iter and write_iter Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 26/33] block_dev: add support for read_iter, write_iter Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 27/33] xfs: add support for read_iter and write_iter Dave Kleikamp
2013-07-26 11:51 ` Dave Chinner
2013-07-25 17:50 ` [PATCH V8 28/33] gfs2: Convert aio_read/write ops to read/write_iter Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 29/33] udf: convert file ops from aio_read/write " Dave Kleikamp
2013-07-25 21:34 ` Jan Kara
2013-07-25 17:50 ` [PATCH V8 30/33] afs: add support for read_iter and write_iter Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 31/33] ecrpytfs: Convert aio_read/write ops to read/write_iter Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 32/33] ubifs: convert file ops from aio_read/write " Dave Kleikamp
2013-07-25 17:50 ` [PATCH V8 33/33] tmpfs: add support for read_iter and write_iter Dave Kleikamp
2013-07-30 21:28 ` [PATCH V8 00/33] loop: Issue O_DIRECT aio using bio_vec Andrew Morton
2013-07-31 0:43 ` Dave Chinner
2013-07-31 6:40 ` Sedat Dilek
2013-07-31 8:41 ` Sedat Dilek
2013-07-31 11:22 ` Sedat Dilek
2013-07-31 9:51 ` Maxim Patlasov
2013-08-01 8:58 ` Christoph Hellwig
2013-08-01 13:04 ` Dave Kleikamp
2013-08-02 10:48 ` Christoph Hellwig
2013-08-20 13:00 ` Christoph Hellwig
2013-08-20 19:13 ` Dave Kleikamp
2013-08-21 0:14 ` Stephen Rothwell
2013-08-21 5:35 ` Sedat Dilek
2013-08-20 22:46 ` Andrew Morton
2013-08-21 13:02 ` Benjamin LaHaise
2013-08-21 16:30 ` Dave Kleikamp
2013-08-21 16:39 ` Benjamin LaHaise
2013-08-21 17:12 ` Dave Kleikamp
2013-08-21 19:30 ` Andrew Morton
2013-08-21 20:24 ` Benjamin LaHaise
2013-10-14 15:07 ` Christoph Hellwig
2013-10-14 21:29 ` Benjamin LaHaise
2013-10-15 16:55 ` Christoph Hellwig
2013-10-15 17:14 ` Benjamin LaHaise
2013-10-15 17:18 ` Christoph Hellwig
2013-10-15 17:53 ` Dave Kleikamp
2014-12-31 20:38 ` Sedat Dilek
2014-12-31 21:52 ` Dave Kleikamp
2014-12-31 22:35 ` Sedat Dilek
2015-01-01 0:52 ` Ming Lei
2015-01-05 19:24 ` Maxim Patlasov
2015-01-06 13:18 ` Ming Lei
2015-01-10 16:51 ` Ming Lei
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