On Tue, 2007-02-13 at 09:58 -0800, Andrew Morton wrote:
> > On Tue, 13 Feb 2007 08:58:16 -0800 Dave Hansen <[EMAIL PROTECTED]> wrote:
> > > yipes. A new mount-wide spin_lock/unlock for each for-writing open() and
> > > close().
> > > Can we have a microbenchmark on this please?
> >
> > Yeah,
> On Tue, 13 Feb 2007 08:58:16 -0800 Dave Hansen <[EMAIL PROTECTED]> wrote:
> > yipes. A new mount-wide spin_lock/unlock for each for-writing open() and
> > close().
> > Can we have a microbenchmark on this please?
>
> Yeah, I'll schedule some dbench time on a NUMA machine.
dbench doesn't do
On Mon, 2007-02-12 at 21:11 -0800, Andrew Morton wrote:
> On Fri, 09 Feb 2007 14:53:37 -0800 Dave Hansen <[EMAIL PROTECTED]> wrote:
>
> > diff -puN
> > fs/file_table.c~14-24-tricky-elevate-write-count-files-are-open-ed
> > fs/file_table.c
> > ---
On Mon, 2007-02-12 at 21:11 -0800, Andrew Morton wrote:
On Fri, 09 Feb 2007 14:53:37 -0800 Dave Hansen [EMAIL PROTECTED] wrote:
diff -puN
fs/file_table.c~14-24-tricky-elevate-write-count-files-are-open-ed
fs/file_table.c
---
On Tue, 13 Feb 2007 08:58:16 -0800 Dave Hansen [EMAIL PROTECTED] wrote:
yipes. A new mount-wide spin_lock/unlock for each for-writing open() and
close().
Can we have a microbenchmark on this please?
Yeah, I'll schedule some dbench time on a NUMA machine.
dbench doesn't do open() a
On Tue, 2007-02-13 at 09:58 -0800, Andrew Morton wrote:
On Tue, 13 Feb 2007 08:58:16 -0800 Dave Hansen [EMAIL PROTECTED] wrote:
yipes. A new mount-wide spin_lock/unlock for each for-writing open() and
close().
Can we have a microbenchmark on this please?
Yeah, I'll schedule some
On Fri, 09 Feb 2007 14:53:37 -0800 Dave Hansen <[EMAIL PROTECTED]> wrote:
> diff -puN fs/file_table.c~14-24-tricky-elevate-write-count-files-are-open-ed
> fs/file_table.c
> --- lxc/fs/file_table.c~14-24-tricky-elevate-write-count-files-are-open-ed
> 2007-02-09 14:26:54.0 -0800
> +++
On Fri, 09 Feb 2007 14:53:37 -0800 Dave Hansen [EMAIL PROTECTED] wrote:
diff -puN fs/file_table.c~14-24-tricky-elevate-write-count-files-are-open-ed
fs/file_table.c
--- lxc/fs/file_table.c~14-24-tricky-elevate-write-count-files-are-open-ed
2007-02-09 14:26:54.0 -0800
+++
This is the first really tricky patch in the series. It
elevates the writer count on a mount each time a
non-special file is opened for write.
This is not completely apparent in the patch because the
two if() conditions in may_open() above the
mnt_want_write() call are, combined, equivalent to
This is the first really tricky patch in the series. It
elevates the writer count on a mount each time a
non-special file is opened for write.
This is not completely apparent in the patch because the
two if() conditions in may_open() above the
mnt_want_write() call are, combined, equivalent to
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