On Sat, Oct 17, 2020 at 2:11 PM Kent Overstreet
wrote:
>
> Convert generic_file_buffered_read() to get pages to read from in
> batches, and then copy data to userspace from many pages at once - in
> particular, we now don't touch any cachelines that might be contended
> while we're in the loop
Convert generic_file_buffered_read() to get pages to read from in
batches, and then copy data to userspace from many pages at once - in
particular, we now don't touch any cachelines that might be contended
while we're in the loop to copy data to userspace.
This is is a performance improvement on
On Tue, Jun 09, 2020 at 06:38:08PM -0700, Matthew Wilcox wrote:
> On Tue, Jun 09, 2020 at 08:10:36PM -0400, Kent Overstreet wrote:
> > Convert generic_file_buffered_read() to get pages to read from in
> > batches, and then copy data to userspace from many pages at once - in
> > particular, we now
On Tue, Jun 09, 2020 at 08:10:36PM -0400, Kent Overstreet wrote:
> Convert generic_file_buffered_read() to get pages to read from in
> batches, and then copy data to userspace from many pages at once - in
> particular, we now don't touch any cachelines that might be contended
> while we're in the
On Tue, Jun 09, 2020 at 05:47:53PM -0700, Matthew Wilcox wrote:
> On Tue, Jun 09, 2020 at 08:10:36PM -0400, Kent Overstreet wrote:
> > @@ -2275,83 +2287,93 @@ static ssize_t generic_file_buffered_read(struct
> > kiocb *iocb,
> > struct iov_iter *iter, ssize_t written)
> > {
> >
On Tue, Jun 09, 2020 at 08:10:36PM -0400, Kent Overstreet wrote:
> @@ -2275,83 +2287,93 @@ static ssize_t generic_file_buffered_read(struct
> kiocb *iocb,
> struct iov_iter *iter, ssize_t written)
> {
> struct file *filp = iocb->ki_filp;
> + struct file_ra_state *ra =
Convert generic_file_buffered_read() to get pages to read from in
batches, and then copy data to userspace from many pages at once - in
particular, we now don't touch any cachelines that might be contended
while we're in the loop to copy data to userspace.
This is is a performance improvement on
Hi Kent,
I love your patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v4.18 next-20180816]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system]
url:
Hi Kent,
I love your patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v4.18 next-20180816]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system]
url:
Convert generic_file_buffered_read() to get pages to read from in
batches, and then copy data to userspace from many pages at once - in
particular, we now don't touch any cachelines that might be contended
while we're in the loop to copy data to userspace.
This is is a performance improvement on
Convert generic_file_buffered_read() to get pages to read from in
batches, and then copy data to userspace from many pages at once - in
particular, we now don't touch any cachelines that might be contended
while we're in the loop to copy data to userspace.
This is is a performance improvement on
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