mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 18:45:02 +07:00
fd50fbb6bf
We seem to be missing some W/A for 2M pages and are getting a hit on raw GPU read bandwidths (even 30%) even though the GPU write bandwidths improve (even 10%). For now, disable THP, which is our only practical source of 2M pages until we have a W/A for the issue. v2: - Be explicit that we talk about GPU bandwidths (Eero) - s/deny/never/ because that's why (Chris) Reported-by: Valtteri Rantala <valtteri.rantala@intel.com> Fixes:b901bb8932("drm/i915/gemfs: enable THP") Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Matthew Auld <matthew.auld@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Valtteri Rantala <valtteri.rantala@intel.com> Cc: Eero Tamminen <eero.t.tamminen@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Tested-by: Valtteri Rantala <valtteri.rantala@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171127091233.7001-1-joonas.lahtinen@linux.intel.com (cherry picked from commit9987da4b5d) Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/*
|
|
* Copyright © 2017 Intel Corporation
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/pagemap.h>
|
|
|
|
#include "i915_drv.h"
|
|
#include "i915_gemfs.h"
|
|
|
|
int i915_gemfs_init(struct drm_i915_private *i915)
|
|
{
|
|
struct file_system_type *type;
|
|
struct vfsmount *gemfs;
|
|
|
|
type = get_fs_type("tmpfs");
|
|
if (!type)
|
|
return -ENODEV;
|
|
|
|
gemfs = kern_mount(type);
|
|
if (IS_ERR(gemfs))
|
|
return PTR_ERR(gemfs);
|
|
|
|
/*
|
|
* Enable huge-pages for objects that are at least HPAGE_PMD_SIZE, most
|
|
* likely 2M. Note that within_size may overallocate huge-pages, if say
|
|
* we allocate an object of size 2M + 4K, we may get 2M + 2M, but under
|
|
* memory pressure shmem should split any huge-pages which can be
|
|
* shrunk.
|
|
*/
|
|
|
|
if (has_transparent_hugepage()) {
|
|
struct super_block *sb = gemfs->mnt_sb;
|
|
/* FIXME: Disabled until we get W/A for read BW issue. */
|
|
char options[] = "huge=never";
|
|
int flags = 0;
|
|
int err;
|
|
|
|
err = sb->s_op->remount_fs(sb, &flags, options);
|
|
if (err) {
|
|
kern_unmount(gemfs);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
i915->mm.gemfs = gemfs;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void i915_gemfs_fini(struct drm_i915_private *i915)
|
|
{
|
|
kern_unmount(i915->mm.gemfs);
|
|
}
|