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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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10be98a77c
Continuing the theme of separating out the GEM clutter. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190528092956.14910-8-chris@chris-wilson.co.uk
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright © 2017 Intel Corporation
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*/
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#include <linux/fs.h>
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#include <linux/mount.h>
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#include <linux/pagemap.h>
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#include "i915_drv.h"
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#include "i915_gemfs.h"
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int i915_gemfs_init(struct drm_i915_private *i915)
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{
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struct file_system_type *type;
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struct vfsmount *gemfs;
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type = get_fs_type("tmpfs");
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if (!type)
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return -ENODEV;
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gemfs = kern_mount(type);
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if (IS_ERR(gemfs))
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return PTR_ERR(gemfs);
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/*
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* Enable huge-pages for objects that are at least HPAGE_PMD_SIZE, most
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* likely 2M. Note that within_size may overallocate huge-pages, if say
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* we allocate an object of size 2M + 4K, we may get 2M + 2M, but under
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* memory pressure shmem should split any huge-pages which can be
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* shrunk.
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*/
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if (has_transparent_hugepage()) {
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struct super_block *sb = gemfs->mnt_sb;
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/* FIXME: Disabled until we get W/A for read BW issue. */
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char options[] = "huge=never";
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int flags = 0;
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int err;
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err = sb->s_op->remount_fs(sb, &flags, options);
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if (err) {
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kern_unmount(gemfs);
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return err;
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}
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}
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i915->mm.gemfs = gemfs;
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return 0;
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}
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void i915_gemfs_fini(struct drm_i915_private *i915)
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{
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kern_unmount(i915->mm.gemfs);
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}
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