€•ù$      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ(/translations/zh_CN/scheduler/membarrier”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ(/translations/zh_TW/scheduler/membarrier”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ(/translations/it_IT/scheduler/membarrier”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ(/translations/ja_JP/scheduler/membarrier”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ(/translations/ko_KR/scheduler/membarrier”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ(/translations/sp_SP/scheduler/membarrier”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒcomment”“”)”}”(hŒ SPDX-License-Identifier: GPL-2.0”h]”hŒ SPDX-License-Identifier: GPL-2.0”…””}”hh£sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1h¡hhhžhhŸŒB/var/lib/git/docbuild/linux/Documentation/scheduler/membarrier.rst”h KubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒmembarrier() System Call”h]”hŒmembarrier() System Call”…””}”(hh»hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hh¶hžhhŸh³h Kubhµ)”}”(hhh]”(hº)”}”(hŒEMEMBARRIER_CMD_{PRIVATE,GLOBAL}_EXPEDITED - Architecture requirements”h]”hŒEMEMBARRIER_CMD_{PRIVATE,GLOBAL}_EXPEDITED - Architecture requirements”…””}”(hhÌhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hhÉhžhhŸh³h Kubhµ)”}”(hhh]”(hº)”}”(hŒ(Memory barriers before updating rq->curr”h]”hŒ(Memory barriers before updating rq->curr”…””}”(hhÝhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hhÚhžhhŸh³h KubhŒ	paragraph”“”)”}”(hX¥  The commands MEMBARRIER_CMD_PRIVATE_EXPEDITED and MEMBARRIER_CMD_GLOBAL_EXPEDITED
require each architecture to have a full memory barrier after coming from
user-space, before updating rq->curr.  This barrier is implied by the sequence
rq_lock(); smp_mb__after_spinlock() in __schedule().  The barrier matches a full
barrier in the proximity of the membarrier system call exit, cf.
membarrier_{private,global}_expedited().”h]”hX¥  The commands MEMBARRIER_CMD_PRIVATE_EXPEDITED and MEMBARRIER_CMD_GLOBAL_EXPEDITED
require each architecture to have a full memory barrier after coming from
user-space, before updating rq->curr.  This barrier is implied by the sequence
rq_lock(); smp_mb__after_spinlock() in __schedule().  The barrier matches a full
barrier in the proximity of the membarrier system call exit, cf.
membarrier_{private,global}_expedited().”…””}”(hhíhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h KhhÚhžhubeh}”(h]”Œ'memory-barriers-before-updating-rq-curr”ah ]”h"]”Œ(memory barriers before updating rq->curr”ah$]”h&]”uh1h´hhÉhžhhŸh³h Kubhµ)”}”(hhh]”(hº)”}”(hŒ'Memory barriers after updating rq->curr”h]”hŒ'Memory barriers after updating rq->curr”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hj  hžhhŸh³h Kubhì)”}”(hX  The commands MEMBARRIER_CMD_PRIVATE_EXPEDITED and MEMBARRIER_CMD_GLOBAL_EXPEDITED
require each architecture to have a full memory barrier after updating rq->curr,
before returning to user-space.  The schemes providing this barrier on the various
architectures are as follows.”h]”hX  The commands MEMBARRIER_CMD_PRIVATE_EXPEDITED and MEMBARRIER_CMD_GLOBAL_EXPEDITED
require each architecture to have a full memory barrier after updating rq->curr,
before returning to user-space.  The schemes providing this barrier on the various
architectures are as follows.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h Khj  hžhubhŒblock_quote”“”)”}”(hX   - alpha, arc, arm, hexagon, mips rely on the full barrier implied by
  spin_unlock() in finish_lock_switch().

- arm64 relies on the full barrier implied by switch_to().

- powerpc, riscv, s390, sparc, x86 rely on the full barrier implied by
  switch_mm(), if mm is not NULL; they rely on the full barrier implied
  by mmdrop(), otherwise.  On powerpc and riscv, switch_mm() relies on
  membarrier_arch_switch_mm().
”h]”hŒbullet_list”“”)”}”(hhh]”(hŒ	list_item”“”)”}”(hŒjalpha, arc, arm, hexagon, mips rely on the full barrier implied by
spin_unlock() in finish_lock_switch().
”h]”hì)”}”(hŒialpha, arc, arm, hexagon, mips rely on the full barrier implied by
spin_unlock() in finish_lock_switch().”h]”hŒialpha, arc, arm, hexagon, mips rely on the full barrier implied by
spin_unlock() in finish_lock_switch().”…””}”(hj3  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h Khj/  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j-  hj*  ubj.  )”}”(hŒ9arm64 relies on the full barrier implied by switch_to().
”h]”hì)”}”(hŒ8arm64 relies on the full barrier implied by switch_to().”h]”hŒ8arm64 relies on the full barrier implied by switch_to().”…””}”(hjK  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h KhjG  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j-  hj*  ubj.  )”}”(hŒípowerpc, riscv, s390, sparc, x86 rely on the full barrier implied by
switch_mm(), if mm is not NULL; they rely on the full barrier implied
by mmdrop(), otherwise.  On powerpc and riscv, switch_mm() relies on
membarrier_arch_switch_mm().
”h]”hì)”}”(hŒìpowerpc, riscv, s390, sparc, x86 rely on the full barrier implied by
switch_mm(), if mm is not NULL; they rely on the full barrier implied
by mmdrop(), otherwise.  On powerpc and riscv, switch_mm() relies on
membarrier_arch_switch_mm().”h]”hŒìpowerpc, riscv, s390, sparc, x86 rely on the full barrier implied by
switch_mm(), if mm is not NULL; they rely on the full barrier implied
by mmdrop(), otherwise.  On powerpc and riscv, switch_mm() relies on
membarrier_arch_switch_mm().”…””}”(hjc  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h K!hj_  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j-  hj*  ubeh}”(h]”h ]”h"]”h$]”h&]”Œbullet”Œ-”uh1j(  hŸh³h Khj$  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j"  hŸh³h Khj  hžhubhì)”}”(hŒ…The barrier matches a full barrier in the proximity of the membarrier system call
entry, cf. membarrier_{private,global}_expedited().”h]”hŒ…The barrier matches a full barrier in the proximity of the membarrier system call
entry, cf. membarrier_{private,global}_expedited().”…””}”(hj…  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h K&hj  hžhubeh}”(h]”Œ&memory-barriers-after-updating-rq-curr”ah ]”h"]”Œ'memory barriers after updating rq->curr”ah$]”h&]”uh1h´hhÉhžhhŸh³h Kubeh}”(h]”ŒAmembarrier-cmd-private-global-expedited-architecture-requirements”ah ]”h"]”ŒEmembarrier_cmd_{private,global}_expedited - architecture requirements”ah$]”h&]”uh1h´hh¶hžhhŸh³h Kubeh}”(h]”Œmembarrier-system-call”ah ]”h"]”Œmembarrier() system call”ah$]”h&]”uh1h´hhhžhhŸh³h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h³uh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¹NŒ	generator”NŒ	datestamp”NŒsource_link”NŒ
source_url”NŒtoc_backlinks”Œentry”Œfootnote_backlinks”KŒsectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒstrip_classes”NŒreport_level”KŒ
halt_level”KŒexit_status_level”KŒdebug”NŒwarning_stream”NŒ	traceback”ˆŒinput_encoding”Œ	utf-8-sig”Œinput_encoding_error_handler”Œstrict”Œoutput_encoding”Œutf-8”Œoutput_encoding_error_handler”jÎ  Œerror_encoding”Œutf-8”Œerror_encoding_error_handler”Œbackslashreplace”Œlanguage_code”Œen”Œrecord_dependencies”NŒconfig”NŒ	id_prefix”hŒauto_id_prefix”Œid”Œdump_settings”NŒdump_internals”NŒdump_transforms”NŒdump_pseudo_xml”NŒexpose_internals”NŒstrict_visitor”NŒ_disable_config”NŒ_source”h³Œ_destination”NŒ_config_files”]”Œ7/var/lib/git/docbuild/linux/Documentation/docutils.conf”aŒfile_insertion_enabled”ˆŒraw_enabled”KŒline_length_limit”M'Œpep_references”NŒpep_base_url”Œhttps://peps.python.org/”Œpep_file_url_template”Œpep-%04d”Œrfc_references”NŒrfc_base_url”Œ&https://datatracker.ietf.org/doc/html/”Œ	tab_width”KŒtrim_footnote_reference_space”‰Œsyntax_highlight”Œlong”Œsmart_quotes”ˆŒsmartquotes_locales”]”Œcharacter_level_inline_markup”‰Œdoctitle_xform”‰Œdocinfo_xform”KŒsectsubtitle_xform”‰Œimage_loading”Œlink”Œembed_stylesheet”‰Œcloak_email_addresses”ˆŒsection_self_link”‰Œenv”NubŒreporter”NŒindirect_targets”]”Œsubstitution_defs”}”Œsubstitution_names”}”Œrefnames”}”Œrefids”}”Œnameids”}”(j¨  j¥  j   j  j   hýj˜  j•  uŒ	nametypes”}”(j¨  ‰j   ‰j   ‰j˜  ‰uh}”(j¥  h¶j  hÉhýhÚj•  j  uŒfootnote_refs”}”Œcitation_refs”}”Œautofootnotes”]”Œautofootnote_refs”]”Œsymbol_footnotes”]”Œsymbol_footnote_refs”]”Œ	footnotes”]”Œ	citations”]”Œautofootnote_start”KŒsymbol_footnote_start”K Œ
id_counter”Œcollections”ŒCounter”“”}”…”R”Œparse_messages”]”Œtransform_messages”]”Œtransformer”NŒinclude_log”]”Œ
decoration”Nhžhub.