Re: [PATCH SLOF 3/5] disk-label: introduce helper to check fat filesystem

Hi Segher, Segher Boessenkool writes: > On Mon, Jun 22, 2015 at 01:29:45PM +0530, Nikunj A Dadhania wrote: >> +: has-fat-filesystem ( block -- true | false ) >> + \ block 0 byte 0-2 is a jump instruction in all FAT >> + \ filesystems. > > "block" there is not a block number, just a host addr

[PATCH v2 1/2] powerpc32: checksum_wrappers_64 becomes checksum_wrappers

The powerpc64 checksum wrapper functions adds the csum_and_copy_to_user() which otherwise is implemented in include/net/checksum.h by using csum_partial() then copy_to_user() Those two wrapper fonctions are also applicable to powerpc32 as it is based on the use of csum_partial_copy_generic() which

[PATCH v2 2/2] powerpc32: rewrite of csum_partial_copy_generic based of copy_tofrom_user

csum_partial_copy_generic() does the same as copy_tofrom_user and also calculates the checksum during the copy. Unlike copy_tofrom_user(), the existing version of csum_partial_copy_generic() doesn't take benefit of the cache This patch is a rewrite of csum_partial_copy_generic() based on copy_tofr

[PATCH v2 0/2] powerpc32: optimisation of csum_partial_copy_generic()

This patch optimises csum_partial_copy_generic() by making use of cache instructions (dcbt/dcbz) just like copy_tofrom_user() does On a TCP benchmark using socklib on the loopback interface on which checksum offload and scatter/gather have been deactivated, we get about 20% performance increase.

Re: [PATCH 1/2] Move the pt_regs_offset struct definition from arch to common include file

On Fri, 2015-06-19 at 10:12 -0400, David Long wrote: > On 06/19/15 00:19, Michael Ellerman wrote: > > On Mon, 2015-06-15 at 12:42 -0400, David Long wrote: > >> From: "David A. Long" > >> > >> The pt_regs_offset structure is used for HAVE_REGS_AND_STACK_ACCESS_API > >> feature and has identical d

Re: [PATCH v2 6/7]powerpc/powernv: generic nest pmu event functions

Madhavan Srinivasan [ma...@linux.vnet.ibm.com] wrote: | From: Madhavan Srinivasan | Subject: [PATCH v2 6/7]powerpc/powernv: generic nest pmu event functions | | Add generic format attribute and set of generic nest pmu related | event functions to be used by each nest pmu. Add code to register nes

Re: [RFC PATCH] powerpc/numa: initialize distance lookup table from drconf path

Hi Nikunj, > From: Nikunj A Dadhania > > powerpc/numa: initialize distance lookup table from drconf path > > In some situations, a NUMA guest that supports > ibm,dynamic-memory-reconfiguration node will end up having flat NUMA > distances between nodes. This is because of two problems in the >

Re: [PATCH 1/2] powerpc32: checksum_wrappers_64 becomes checksum_wrappers

On Mon, 2015-06-22 at 19:01 +0200, Christophe Leroy wrote: > The powerpc64 checksum wrapper functions adds the > csum_and_copy_to_user() which > otherwise is implemented in include/net/checksum.h by using > csum_partial() then > copy_to_user() > > Those two wrapper fonctions are also applicable

[PATCH] powerpc: remove unneeded check in spu_gang_remove_ctx

In discussion to patch "selinux: reduce locking overhead in inode_free_security()" it was figured out that list_del_init() is safe to be called multiple times on the same entry. In that case, it was useful to move a check out of spinlock to decrease lock contention. Here we can remove '!list_empty(

[PATCH 6/6] pseries: Enable kernel CPU dlpar from sysfs

Enable new kernel cpu hotplug functionality by allowing cpu dlpar requests to be initiated from sysfs. Signed-off-by: Nathan Fontenot --- arch/powerpc/platforms/pseries/dlpar.c |6 ++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/pla

[PATCH 5/6] pseries: Add CPU dlpar add functionality

Add the ability to hotplug add cpus via rtas hotplug events by either specifying the drc index of the CPU to add, or providing a count of the number of CPUs to add. Signed-off-by: Nathan Fontenot --- arch/powerpc/platforms/pseries/hotplug-cpu.c | 76 ++ 1 file changed,

[PATCH 4/6] pseries: Add CPU dlpar remove functionality

Add the ability to dlpar remove CPUs via hotplug rtas events, either by specifying the drc-index of the CPU to remove or providing a count of cpus to remove. To accomplish we create a list of possible dr cpus and their drc indexes so we can easily traverse the list looking for candidates to remov

[PATCH 3/6] pseries: Update CPU hotplug error recovery

Update the cpu dlpar add/remove paths to do better error recovery when a failure occurs during the add/remove operation. This includes adding some pr_info and pr_debug statements. Signed-off-by: Nathan Fontenot --- arch/powerpc/platforms/pseries/hotplug-cpu.c | 34 +++---

[PATCH 2/6] pseries: Factor out common cpu hotplug code

Re-factor the cpu hotplug code to support cpu hotplug completely in the kernel and using the existing sysfs probe/release interface. Move pieces of the existing cpu hotplug code that will be common to both interfaces into common routines. This patch does not introduce any functional changes. S

[PATCH 1/6] pseries: Consolidate CPU hotplug code to hotplug-cpu.c

No functional changes, this patch is simply a move of the cpu hotplug code from pseries/dlpar.c to pseries/hotplug-cpu.c. This is in an effort to consolidate all of the cpu hotplug code in a common place. Signed-off-by: Nathan Fontenot --- arch/powerpc/platforms/pseries/dlpar.c | 189

[PATCH 0/6] pseries: Move CPU dlpar into the kernel

To better support CPU hotplug in PowerKVM and PowerVM environments, the handling of CPU dlpar should be done entirely in the kernel. This will allow a common entry point for PowerVM and PowerKVM CPU dlpar requests. For both environments, the entry point is the same one introduced in a previous patc

Re: [PATCH SLOF 3/5] disk-label: introduce helper to check fat filesystem

On Mon, Jun 22, 2015 at 01:29:45PM +0530, Nikunj A Dadhania wrote: > +: has-fat-filesystem ( block -- true | false ) > + \ block 0 byte 0-2 is a jump instruction in all FAT > + \ filesystems. "block" there is not a block number, just a host address. So it's not a good name. Maybe do a better

[PATCH 2/2] powerpc32: rewrite of csum_partial_copy_generic based of copy_tofrom_user

csum_partial_copy_generic() does the same as copy_tofrom_user and also calculates the checksum during the copy. Unlike copy_tofrom_user(), the existing version of csum_partial_copy_generic() doesn't take benefit of the cache This patch is a rewrite of csum_partial_copy_generic() based on copy_tofr

[PATCH 1/2] powerpc32: checksum_wrappers_64 becomes checksum_wrappers

The powerpc64 checksum wrapper functions adds the csum_and_copy_to_user() which otherwise is implemented in include/net/checksum.h by using csum_partial() then copy_to_user() Those two wrapper fonctions are also applicable to powerpc32 as it is based on the use of csum_partial_copy_generic() which

[PATCH 0/2] powerpc32: optimisation of csum_partial_copy_generic()

This patch optimises csum_partial_copy_generic() by making use of cache instructions (dcbt/dcbz) just like copy_tofrom_user() does On a TCP benchmark using socklib on the loopback interface on which checksum offload and scatter/gather have been deactivated, we get about 20% performance increase.

Re: [RESEND PATCH V2 1/3] Add mmap flag to request pages are locked after page fault

On Mon, 22 Jun 2015, Michal Hocko wrote: > On Fri 19-06-15 12:43:33, Eric B Munson wrote: > > On Fri, 19 Jun 2015, Michal Hocko wrote: > > > > > On Thu 18-06-15 16:30:48, Eric B Munson wrote: > > > > On Thu, 18 Jun 2015, Michal Hocko wrote: > > > [...] > > > > > Wouldn't it be much more reasonabl

Re: [PATCH V2] cxl: Set up and enable PSL Timebase

Philippe Bergheaud wrote: This patch configures the PSL Timebase function and enables it, after the CAPP has been initialized by OPAL. V2: - Clear CXL_PSL_ErrIVTE_tberror bit - Define the sync count unit - Wait 1ms before each test - Use negative error code - Do not ignore errors - Except

Re: [RESEND PATCH V2 1/3] Add mmap flag to request pages are locked after page fault

On Fri 19-06-15 12:43:33, Eric B Munson wrote: > On Fri, 19 Jun 2015, Michal Hocko wrote: > > > On Thu 18-06-15 16:30:48, Eric B Munson wrote: > > > On Thu, 18 Jun 2015, Michal Hocko wrote: > > [...] > > > > Wouldn't it be much more reasonable and straightforward to have > > > > MAP_FAULTPOPULATE

Re: [PATCH v2 7/7]powerpc/powernv: nest pmu cpumask and cpu hotplug support

On Tuesday 16 June 2015 11:58 AM, Preeti U Murthy wrote: > On 06/11/2015 10:47 AM, Madhavan Srinivasan wrote: >> Adds cpumask attribute to be used by each nest pmu since nest >> units are per-chip. Only one cpu (first online cpu) from each node/chip >> is designated to read counters. >> >> On cpu

Re: [PATCH v4 0/3] LED interface for PowerNV platform

On 06/11/2015 08:33 AM, Vasant Hegde wrote: On 04/28/2015 03:39 PM, Vasant Hegde wrote: The following series implements LED driver for PowerNV platform. Ben, Michael, Can you please review/ACK this patchset? Yeah, we are waiting for ppc maintainer's ack, also to clarify DT related issues. B

[PATCH SLOF 5/5] disk-label: make gpt detection code more robust

* Check for Protective MBR Magic * Check for valid GPT Signature * Boundary check for allocated block size before reading into the buffer Signed-off-by: Nikunj A Dadhania --- slof/fs/packages/disk-label.fs | 21 + 1 file changed, 17 insertions(+), 4 deletions(-) diff --git

[PATCH SLOF 3/5] disk-label: introduce helper to check fat filesystem

Signed-off-by: Nikunj A Dadhania --- slof/fs/packages/disk-label.fs | 22 +- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/slof/fs/packages/disk-label.fs b/slof/fs/packages/disk-label.fs index 2cf1b85..e317e93 100644 --- a/slof/fs/packages/disk-label.fs +++ b/

[PATCH SLOF 0/5] GPT fixes/cleanup and LVM support with FAT

Following patchset implements some improvements and cleanup for the GPT booting code: patch 1: Simplify the gpt detection code with lesser scopes and add comments. patch 2: Introduce 8byte LE helpers: x@-le and x!-le patch 3: As we need to detect FAT partition, implement a helper that

[PATCH SLOF 1/5] disk-label: simplify gpt-prep-partition? routine

Signed-off-by: Nikunj A Dadhania --- slof/fs/packages/disk-label.fs | 36 +--- 1 file changed, 13 insertions(+), 23 deletions(-) diff --git a/slof/fs/packages/disk-label.fs b/slof/fs/packages/disk-label.fs index fe1c25e..2305eee 100644 --- a/slof/fs/packages/disk-

[PATCH SLOF 4/5] disk-label: add support for booting from GPT FAT partition

For a GPT+LVM combination disk, older bootloader that does not support LVM, cannot load kernel from LVM. The patch add support to read from BASIC_DATA UUID partition. Installer has installed CHRP-BOOT config on a FAT file system. Signed-off-by: Nikunj A Dadhania --- slof/fs/packages/disk-label.

[PATCH SLOF 2/5] introduce 8-byte LE helpers

Signed-off-by: Nikunj A Dadhania --- slof/fs/little-endian.fs | 6 ++ slof/fs/packages/disk-label.fs | 4 ++-- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/slof/fs/little-endian.fs b/slof/fs/little-endian.fs index f2e4e8d..6b4779e 100644 --- a/slof/fs/little-endian.fs