litmus-rt-ext-res.git - LITMUS^RT with extended reservations for Forbidden Zones paper @ RTAS'20

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author	Oleg Nesterov <oleg@redhat.com>	2013-10-16 16:10:04 -0400
committer	Ingo Molnar <mingo@kernel.org>	2013-10-29 07:02:52 -0400
commit	3ea2f2b96f9e636f49eb10962e96db3e19cab157 (patch)
tree	47cbcc90d4daa2155c2a5f0ebd357a0499d78316 /tools/perf/scripts/python/netdev-times.py
parent	32c5fb7e7d18b4fd37c5e29dea731151e9d66866 (diff)

perf: Do not waste PAGE_SIZE bytes for ALIGN(8) in perf_event_mmap_event()

perf_event_mmap_event() does kzalloc(PATH_MAX + sizeof(u64)) to ensure we can align the size later. However this means that we actually allocate PAGE_SIZE * 2 buffer, seems too much. Change this code to allocate PATH_MAX==PAGE_SIZE bytes, but tell d_path() to not use the last sizeof(u64) bytes. Note: it is not clear why do we need __GFP_ZERO, see the next patch. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20131016201004.GC23214@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>

Diffstat (limited to 'tools/perf/scripts/python/netdev-times.py')

0 files changed, 0 insertions, 0 deletions

/* * RapidIO register definitions * * Copyright 2005 MontaVista Software, Inc. * Matt Porter <mporter@kernel.crashing.org> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #ifndef LINUX_RIO_REGS_H #define LINUX_RIO_REGS_H /* * In RapidIO, each device has a 16MB configuration space that is * accessed via maintenance transactions. Portions of configuration * space are standardized and/or reserved. */ #define RIO_MAINT_SPACE_SZ 0x1000000 /* 16MB of RapidIO mainenance space */ #define RIO_DEV_ID_CAR 0x00 /* [I] Device Identity CAR */ #define RIO_DEV_INFO_CAR 0x04 /* [I] Device Information CAR */ #define RIO_ASM_ID_CAR 0x08 /* [I] Assembly Identity CAR */ #define RIO_ASM_ID_MASK 0xffff0000 /* [I] Asm ID Mask */ #define RIO_ASM_VEN_ID_MASK 0x0000ffff /* [I] Asm Vend Mask */ #define RIO_ASM_INFO_CAR 0x0c /* [I] Assembly Information CAR */ #define RIO_ASM_REV_MASK 0xffff0000 /* [I] Asm Rev Mask */ #define RIO_EXT_FTR_PTR_MASK 0x0000ffff /* [I] EF_PTR Mask */ #define RIO_PEF_CAR 0x10 /* [I] Processing Element Features CAR */ #define RIO_PEF_BRIDGE 0x80000000 /* [I] Bridge */ #define RIO_PEF_MEMORY 0x40000000 /* [I] MMIO */ #define RIO_PEF_PROCESSOR 0x20000000 /* [I] Processor */ #define RIO_PEF_SWITCH 0x10000000 /* [I] Switch */ #define RIO_PEF_MULTIPORT 0x08000000 /* [VI, 2.1] Multiport */ #define RIO_PEF_INB_MBOX 0x00f00000 /* [II, <= 1.2] Mailboxes */ #define RIO_PEF_INB_MBOX0 0x00800000 /* [II, <= 1.2] Mailbox 0 */ #define RIO_PEF_INB_MBOX1 0x00400000 /* [II, <= 1.2] Mailbox 1 */ #define RIO_PEF_INB_MBOX2 0x00200000 /* [II, <= 1.2] Mailbox 2 */ #define RIO_PEF_INB_MBOX3 0x00100000 /* [II, <= 1.2] Mailbox 3 */ #define RIO_PEF_INB_DOORBELL 0x00080000 /* [II, <= 1.2] Doorbells */ #define RIO_PEF_EXT_RT 0x00000200 /* [III, 1.3] Extended route table support */ #define RIO_PEF_STD_RT 0x00000100 /* [III, 1.3] Standard route table support */ #define RIO_PEF_CTLS 0x00000010 /* [III] CTLS */ #define RIO_PEF_EXT_FEATURES 0x00000008 /* [I] EFT_PTR valid */ #define RIO_PEF_ADDR_66 0x00000004 /* [I] 66 bits */ #define RIO_PEF_ADDR_50 0x00000002 /* [I] 50 bits */ #define RIO_PEF_ADDR_34 0x00000001 /* [I] 34 bits */ #define RIO_SWP_INFO_CAR 0x14 /* [I] Switch Port Information CAR */ #define RIO_SWP_INFO_PORT_TOTAL_MASK 0x0000ff00 /* [I] Total number of ports */ #define RIO_SWP_INFO_PORT_NUM_MASK 0x000000ff /* [I] Maintenance transaction port number */ #define RIO_GET_TOTAL_PORTS(x) ((x & RIO_SWP_INFO_PORT_TOTAL_MASK) >> 8) #define RIO_GET_PORT_NUM(x) (x & RIO_SWP_INFO_PORT_NUM_MASK) #define RIO_SRC_OPS_CAR 0x18 /* [I] Source Operations CAR */ #define RIO_SRC_OPS_READ 0x00008000 /* [I] Read op */ #define RIO_SRC_OPS_WRITE 0x00004000 /* [I] Write op */ #define RIO_SRC_OPS_STREAM_WRITE 0x00002000 /* [I] Str-write op */ #define RIO_SRC_OPS_WRITE_RESPONSE 0x00001000 /* [I] Write/resp op */ #define RIO_SRC_OPS_DATA_MSG 0x00000800 /* [II] Data msg op */ #define RIO_SRC_OPS_DOORBELL 0x00000400 /* [II] Doorbell op */ #define RIO_SRC_OPS_ATOMIC_TST_SWP 0x00000100 /* [I] Atomic TAS op */ #define RIO_SRC_OPS_ATOMIC_INC 0x00000080 /* [I] Atomic inc op */ #define RIO_SRC_OPS_ATOMIC_DEC 0x00000040 /* [I] Atomic dec op */ #define RIO_SRC_OPS_ATOMIC_SET 0x00000020 /* [I] Atomic set op */ #define RIO_SRC_OPS_ATOMIC_CLR 0x00000010 /* [I] Atomic clr op */ #define RIO_SRC_OPS_PORT_WRITE 0x00000004 /* [I] Port-write op */ #define RIO_DST_OPS_CAR 0x1c /* Destination Operations CAR */ #define RIO_DST_OPS_READ 0x00008000 /* [I] Read op */ #define RIO_DST_OPS_WRITE 0x00004000 /* [I] Write op */ #define RIO_DST_OPS_STREAM_WRITE 0x00002000 /* [I] Str-write op */ #define RIO_DST_OPS_WRITE_RESPONSE 0x00001000 /* [I] Write/resp op */ #define RIO_DST_OPS_DATA_MSG 0x00000800 /* [II] Data msg op */ #define RIO_DST_OPS_DOORBELL 0x00000400 /* [II] Doorbell op */ #define RIO_DST_OPS_ATOMIC_TST_SWP 0x00000100 /* [I] Atomic TAS op */ #define RIO_DST_OPS_ATOMIC_INC 0x00000080 /* [I] Atomic inc op */ #define RIO_DST_OPS_ATOMIC_DEC 0x00000040 /* [I] Atomic dec op */ #define RIO_DST_OPS_ATOMIC_SET 0x00000020 /* [I] Atomic set op */ #define RIO_DST_OPS_ATOMIC_CLR 0x00000010 /* [I] Atomic clr op */ #define RIO_DST_OPS_PORT_WRITE 0x00000004 /* [I] Port-write op */ #define RIO_OPS_READ 0x00008000 /* [I] Read op */ #define RIO_OPS_WRITE 0x00004000 /* [I] Write op */ #define RIO_OPS_STREAM_WRITE 0x00002000 /* [I] Str-write op */ #define RIO_OPS_WRITE_RESPONSE 0x00001000 /* [I] Write/resp op */ #define RIO_OPS_DATA_MSG 0x00000800 /* [II] Data msg op */ #define RIO_OPS_DOORBELL 0x00000400 /* [II] Doorbell op */ #define RIO_OPS_ATOMIC_TST_SWP 0x00000100 /* [I] Atomic TAS op */ #define RIO_OPS_ATOMIC_INC 0x00000080 /* [I] Atomic inc op */ #define RIO_OPS_ATOMIC_DEC 0x00000040 /* [I] Atomic dec op */ #define RIO_OPS_ATOMIC_SET 0x00000020 /* [I] Atomic set op */ #define RIO_OPS_ATOMIC_CLR 0x00000010 /* [I] Atomic clr op */ #define RIO_OPS_PORT_WRITE 0x00000004 /* [I] Port-write op */ /* 0x20-0x30 *//* Reserved */ #define RIO_SWITCH_RT_LIMIT 0x34 /* [III, 1.3] Switch Route Table Destination ID Limit CAR */ #define RIO_RT_MAX_DESTID 0x0000ffff #define RIO_MBOX_CSR 0x40 /* [II, <= 1.2] Mailbox CSR */ #define RIO_MBOX0_AVAIL 0x80000000 /* [II] Mbox 0 avail */ #define RIO_MBOX0_FULL 0x40000000 /* [II] Mbox 0 full */ #define RIO_MBOX0_EMPTY 0x20000000 /* [II] Mbox 0 empty */ #define RIO_MBOX0_BUSY 0x10000000 /* [II] Mbox 0 busy */ #define RIO_MBOX0_FAIL 0x08000000 /* [II] Mbox 0 fail */ #define RIO_MBOX0_ERROR 0x04000000 /* [II] Mbox 0 error */ #define RIO_MBOX1_AVAIL 0x00800000 /* [II] Mbox 1 avail */ #define RIO_MBOX1_FULL 0x00200000 /* [II] Mbox 1 full */ #define RIO_MBOX1_EMPTY 0x00200000 /* [II] Mbox 1 empty */ #define RIO_MBOX1_BUSY 0x00100000 /* [II] Mbox 1 busy */ #define RIO_MBOX1_FAIL 0x00080000 /* [II] Mbox 1 fail */ #define RIO_MBOX1_ERROR 0x00040000 /* [II] Mbox 1 error */ #define RIO_MBOX2_AVAIL 0x00008000 /* [II] Mbox 2 avail */ #define RIO_MBOX2_FULL 0x00004000 /* [II] Mbox 2 full */ #define RIO_MBOX2_EMPTY 0x00002000 /* [II] Mbox 2 empty */ #define RIO_MBOX2_BUSY 0x00001000 /* [II] Mbox 2 busy */ #define RIO_MBOX2_FAIL 0x00000800 /* [II] Mbox 2 fail */ #define RIO_MBOX2_ERROR 0x00000400 /* [II] Mbox 2 error */ #define RIO_MBOX3_AVAIL 0x00000080 /* [II] Mbox 3 avail */ #define RIO_MBOX3_FULL 0x00000040 /* [II] Mbox 3 full */ #define RIO_MBOX3_EMPTY 0x00000020 /* [II] Mbox 3 empty */ #define RIO_MBOX3_BUSY 0x00000010 /* [II] Mbox 3 busy */ #define RIO_MBOX3_FAIL 0x00000008 /* [II] Mbox 3 fail */ #define RIO_MBOX3_ERROR 0x00000004 /* [II] Mbox 3 error */ #define RIO_WRITE_PORT_CSR 0x44 /* [I, <= 1.2] Write Port CSR */ #define RIO_DOORBELL_CSR 0x44 /* [II, <= 1.2] Doorbell CSR */ #define RIO_DOORBELL_AVAIL 0x80000000 /* [II] Doorbell avail */ #define RIO_DOORBELL_FULL 0x40000000 /* [II] Doorbell full */ #define RIO_DOORBELL_EMPTY 0x20000000 /* [II] Doorbell empty */ #define RIO_DOORBELL_BUSY 0x10000000 /* [II] Doorbell busy */ #define RIO_DOORBELL_FAILED 0x08000000 /* [II] Doorbell failed */ #define RIO_DOORBELL_ERROR 0x04000000 /* [II] Doorbell error */ #define RIO_WRITE_PORT_AVAILABLE 0x00000080 /* [I] Write Port Available */ #define RIO_WRITE_PORT_FULL 0x00000040 /* [I] Write Port Full */ #define RIO_WRITE_PORT_EMPTY 0x00000020 /* [I] Write Port Empty */ #define RIO_WRITE_PORT_BUSY 0x00000010 /* [I] Write Port Busy */ #define RIO_WRITE_PORT_FAILED 0x00000008 /* [I] Write Port Failed */ #define RIO_WRITE_PORT_ERROR 0x00000004 /* [I] Write Port Error */ /* 0x48 *//* Reserved */ #define RIO_PELL_CTRL_CSR 0x4c /* [I] PE Logical Layer Control CSR */ #define RIO_PELL_ADDR_66 0x00000004 /* [I] 66-bit addr */ #define RIO_PELL_ADDR_50 0x00000002 /* [I] 50-bit addr */ #define RIO_PELL_ADDR_34 0x00000001 /* [I] 34-bit addr */ /* 0x50-0x54 *//* Reserved */ #define RIO_LCSH_BA 0x58 /* [I] LCS High Base Address */ #define RIO_LCSL_BA 0x5c /* [I] LCS Base Address */ #define RIO_DID_CSR 0x60 /* [III] Base Device ID CSR */ /* 0x64 *//* Reserved */ #define RIO_HOST_DID_LOCK_CSR 0x68 /* [III] Host Base Device ID Lock CSR */ #define RIO_COMPONENT_TAG_CSR 0x6c /* [III] Component Tag CSR */ #define RIO_STD_RTE_CONF_DESTID_SEL_CSR 0x70 #define RIO_STD_RTE_CONF_EXTCFGEN 0x80000000 #define RIO_STD_RTE_CONF_PORT_SEL_CSR 0x74 #define RIO_STD_RTE_DEFAULT_PORT 0x78 /* 0x7c-0xf8 *//* Reserved */ /* 0x100-0xfff8 *//* [I] Extended Features Space */ /* 0x10000-0xfffff8 *//* [I] Implementation-defined Space */ /* * Extended Features Space is a configuration space area where * functionality is mapped into extended feature blocks via a * singly linked list of extended feature pointers (EFT_PTR). * * Each extended feature block can be identified/located in * Extended Features Space by walking the extended feature * list starting with the Extended Feature Pointer located * in the Assembly Information CAR. * * Extended Feature Blocks (EFBs) are identified with an assigned * EFB ID. Extended feature block offsets in the definitions are * relative to the offset of the EFB within the Extended Features * Space. */ /* Helper macros to parse the Extended Feature Block header */ #define RIO_EFB_PTR_MASK 0xffff0000 #define RIO_EFB_ID_MASK 0x0000ffff


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