[PATCH 0/2] ext4: Fix ENOSPC handling for DAX faults

Hello, these two patches fix handling of ENOSPC during DAX faults. The problem is that currently running transaction may be holding lots of already freed blocks which can be reallocated only once the transaction commits. Standard retry logic in ext4_iomap_end() does not work for DAX page fault

[PATCH 2/2] ext4: Fix ENOSPC handling in DAX page fault handler

When allocation of underlying block for a page fault fails, we fail the fault with SIGBUS. However we may well hit ENOSPC just due to lots of free blocks being held by the running / committing transaction. So propagate the error from ext4_iomap_begin() and implement do standard allocation retry

[PATCH 1/2] dax: Pass detailed error code from dax_iomap_fault()

Ext4 needs to pass through error from its iomap handler to the page fault handler so that it can properly detect ENOSPC and force transaction commit and retry the fault (and block allocation). Add argument to dax_iomap_fault() for passing such error. Signed-off-by: Jan Kara ---

[PATCH v3 2/3] hmat: add heterogeneous memory sysfs support

Add a new sysfs subsystem, /sys/devices/system/hmat, which surfaces information about memory initiators and memory targets to the user. These initiators and targets are described by the ACPI SRAT and HMAT tables. A "memory initiator" in this case is a NUMA node containing one or more devices

[PATCH v3 0/3] create sysfs representation of ACPI HMAT

This is the third revision of my patches adding a sysfs representation of the ACPI Heterogeneous Memory Attribute Table (HMAT). These patches are based on v4.15-rc3 and a working tree can be found here: https://git.kernel.org/pub/scm/linux/kernel/git/zwisler/linux.git/log/?h=hmat_v3 My goal is

[PATCH v3 3/3] hmat: add performance attributes

Add performance information found in the HMAT to the sysfs representation. This information lives as an attribute group named "local_init" in the memory target: # tree mem_tgt2 mem_tgt2 ├── firmware_id ├── is_cached ├── local_init │   ├── mem_init0 -> ../../mem_init0 │   ├──

[PATCH v3 1/3] acpi: HMAT support in acpi_parse_entries_array()

The current implementation of acpi_parse_entries_array() assumes that each subtable has a standard ACPI subtable entry of type struct acpi_subtable_header. This standard subtable header has a one byte length followed by a one byte type. The HMAT subtables have to allow for a longer length so

Re: [xfsprogs PATCH v2 0/3] Add necessary items for MAP_SYNC testing

On Tue, Dec 05, 2017 at 04:56:48PM -0700, Ross Zwisler wrote: > This is the second revision of my MAP_SYNC + dm-log-writes support for > xfsprogs. Friendly ping on this xfsprogs series. ___ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org

转发：销*售*人*员

¸½ ¼þ Ïê ÔÄ ___ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm

Re: [PATCH 1/2] mm, hugetlbfs: introduce ->pagesize() to vm_operations_struct

Michal Hocko writes: > On Thu 07-12-17 19:30:55, Dan Williams wrote: >> When device-dax is operating in huge-page mode we want it to behave like >> hugetlbfs and report the MMU page mapping size that is being enforced by >> the vma. Similar to commit 31383c6865a5 "mm,

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Re: [patch] btt: fix uninitialized err_lock

On Wed, 2017-12-13 at 16:33 -0500, Jeff Moyer wrote: > Hi, > > When a sector mode namespace is initially created, the arena's > err_lock > is not initialized. If, on the other hand, the namespace already > exists, the mutex is initialized. To fix the issue, I moved the > mutex > initialization

[patch] btt: fix uninitialized err_lock

Hi, When a sector mode namespace is initially created, the arena's err_lock is not initialized. If, on the other hand, the namespace already exists, the mutex is initialized. To fix the issue, I moved the mutex initialization into the arena_alloc, which is called by both discover_arenas and