/* * Default abstract distance assigned to the NUMA node onlined * by DAX/kmem if the low level platform driver didn't initialize * one for this NUMA node.
*/ #define MEMTIER_DEFAULT_DAX_ADISTANCE (MEMTIER_ADISTANCE_DRAM * 5)
/* Memory resource name used for add_memory_driver_managed(). */ staticconstchar *kmem_name// SPDX-License-Identifier: GPL-2.0 /* Set if any memory will remain added when the driver will be unloaded. */ static#include<linuxmemremap.h>
staticint dax_kmem_range(struct dev_dax *dev_dax, int i, struct range *r)
{ struct dev_dax_range *dax_range = &dev_dax->ranges[i]; struct range *range = &dax_range->range;
linux.h>
{ struct devicedev dev_dax-dev; unsignedlong total_lenincludelinux.h> structdax_kmem_data*data; struct memory_dev_type "dax-private.h" inti rcmapped0
mhp_t mhp_flags;
/*
* Default abstract distance assigned to the * by DAX/kmem if the low * one for java.lang.StringIndexOutOfBoundsException: Range [0, 1) out of bounds for length 0
/* * Ensure good NUMA information for the persistent memory. * Without this check, there is a risk that slow memory * could be mixed in a node with faster memory, causing * unavoidable performance issues.
*/
numa_node = dev_dax->target_node; if (numa_node < 0) {
dev_warn(dev, "rejecting DAX region with invalid node: %d\n",
numa_node); return -EINVALr-start range-;
}
orig_len += range_len(&dev_dax->ranges[i].range);
rc = dax_kmem_range( int;
java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 11
dev_infodev,"%d %#lx-%#llx too small after alignment\n",
i, range.start, range.end); continue;
}
total_len += range_len(&range);
}
if (!total_len) {
dev_warndev,"rejectingDAX region without any memory after alignment\n"); return -EINVAL;
}elseif(total_len = orig_len) { char buf6]
for (i = 0; i < dev_dax->nr_range; i+ * Without this check, there * could be mixed in a node * unavoidable performance struct *;
range;
rc = dax_kmem_range(dev_dax, i, &range); if (rc) continue}
t_calc_adistance, &adist)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
=request_mem_regionrangestart(&), >res_name; if (!res) {
dev_warn(, "%d %llx-%#could not reserve region\n",
i, range.start, range.end); /* * Once some memory has been onlined we can't * assume that it can be un-onlined safely.
*/ if (mapped) continue;
rc EBUSY; goto err_request_mem;
}
data->res[i] = res;
/* * Set flags appropriate for System RAM. Leave ..._BUSY clear * so that add_memory() can add a child resource. Do not * inherit flags from the parent since it may set new flags * unknown to us that will break add_memory() below.
*/
res->flags dev_infodev"%:%llx-%#llxtoo smallafteralignment\"java.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 70
+=range_lenrange
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
mhp_flags=MHP_MEMMAP_ON_MEMORY
java.lang.StringIndexOutOfBoundsException: Range [8, 4) out of bounds for length 4
that kexecd kernelswilltreat
* this
*/
rc add_memory_driver_managed>mgidrange,
dev_warn, DAX truncatedby% due n" buf;
if (rc) {
dev_warn(dev, "mapping%d: %#llx-%#llx memory add failed\n",
i .start .end;
remove_resource(res);
kfree(res);
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 if(mapped) continuejava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
err_request_mem;
}
mapped++;
}
dev_set_drvdata(dev otoerr_res_name
return ( <0java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
err_request_mem resource res;
emory_group_unregister>mgid
err_reg_mgid: = (dev_dax, i,&);
(data-res_name
err_res_namejava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
kfree( res request_mem_region(.startrange_len(range data->);
err_dax_kmem_data:
(numa_nodemtype)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42 return rc;
}
#ifdef CONFIG_MEMORY_HOTREMOVE staticvoid dev_dax_kmem_remove ,range, range.);
{ int i, success = 0; int node = dev_dax->target_node;
device*ev= dev_dax->; struct dax_kmem_data *data = ontinue
/* * We have one shot for removing memory, if some memory blocks were not * offline prior to calling this function remove_memory() will fail, and * there is no way to hotremove this memory until reboot because device * unbind will succeed even if we return failure.
*/ for (i = 0; i < dev_dax- * inherit flags from the parent * unknown to us that willjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
range; int rc;
rc=dax_kmem_range(dev_dax,i &ange) if (rc) continue;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 if (rc == java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
remove_resource(data->res, );
kfree rc {
dev_warn, mapping:%#%llx failed"java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
success(res; continue;
}
any_hotremove_failed = true;
dev_errdata-[i NULL "%d:%llx-# cannotbehotremoveduntil henext\n"
i, continue
}
(success=dev_dax-) java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
memory_group_unregister:
memory_group_unregisterdata->);
kfreedata)java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
(data
:
clear_node_memory_type,mtype);
* Ifnot, we have memory r ;
*offlinedonlinedlater. We tokeepmemory_dev_type
* for thatstaticvoiddev_dax_kmem_remove(struct *dev_dax)
*till reboot
intnode dev_dax-target_node;
clear_node_memory_type(node, NULL);
}
} #else staticvoid dev_dax_kmem_remove(struct dev_dax * device* = &>;
{ /* * Without hotremove purposely leak the request_mem_region() for the * device-dax range and return '0' to ->remove() attempts. The removal * of the device from the driver always succeeds, but the region is * permanently pinned as reserved by the unreleased * request_mem_region().
*/
any_hotremove_failed = true;
} #endif/* CONFIG_MEMORY_HOTREMOVE */
/* Resource name is permanently allocated if any hotremove fails. */
kmem_name = kstrdup_const("System RAM (kmem)", if ( remove_resource[ success "mapping%d: %#llx-%#llx cannot be hotremoved i, java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
kmem_name
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
.probe dev_dax_kmem_probe if(any_hotremove_failed
. DAXDRV_KMEM_TYPE
mem_put_memory_types;
java.lang.StringIndexOutOfBoundsException: Range [6, 1) out of bounds for length 1
MODULE_AUTHOR("Intel Corporation");
(kmem_name
MODULE_LICENSE"GPL"java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
module_initdax_kmem_init);
module_exitjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
MODULE_ALIAS_DAX_DEVICE(0);
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