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kernel / pub / scm / linux / kernel / git / axboe / fio / c5f0a205e9bf205d71ed015aa2be0b9e24b0e756
commitc5f0a205e9bf205d71ed015aa2be0b9e24b0e756[log] [tgz]
authorJens Axboe <axboe@kernel.dk>Wed Sep 28 07:28:58 2022 -0600
committerJens Axboe <axboe@kernel.dk>Wed Sep 28 08:06:52 2022 -0600
tree7a304c35d79ba4d12a169e89fe0f1c93629cc2d5
parent6112c0f5a86c6b437e7158ab40a6e9384ce95e85 [diff]
t/io_uring: get rid of useless read barriers

We don't need a read barrier when we have acquire semantics on reading
the CQ ring tail.

We also don't need acquire semantics on the SQ ring head, unless we're
using SQPOLL. A syscall transition will have happened for !SQPOLL.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed
tree: 7a304c35d79ba4d12a169e89fe0f1c93629cc2d5
  1. .github/
  2. arch/
  3. ci/
  4. compiler/
  5. crc/
  6. doc/
  7. engines/
  8. examples/
  9. exp/
  10. lib/
  11. os/
  12. oslib/
  13. profiles/
  14. t/
  15. tools/
  16. unittests/
  17. .appveyor.yml
  18. .gitignore
  19. backend.c
  20. blktrace.c
  21. blktrace.h
  22. blktrace_api.h
  23. cairo_text_helpers.c
  24. cairo_text_helpers.h
  25. cconv.c
  26. cgroup.c
  27. cgroup.h
  28. CITATION.cff
  29. client.c
  30. client.h
  31. configure
  32. COPYING
  33. debug.c
  34. debug.h
  35. DEDUPE-TODO
  36. dedupe.c
  37. dedupe.h
  38. diskutil.c
  39. diskutil.h
  40. err.h
  41. eta.c
  42. fifo.c
  43. fifo.h
  44. file.h
  45. filehash.c
  46. filehash.h
  47. filelock.c
  48. filelock.h
  49. filesetup.c
  50. FIO-VERSION-GEN
  51. fio.1
  52. fio.c
  53. fio.h
  54. fio_sem.c
  55. fio_sem.h
  56. fio_time.h
  57. flist.h
  58. flow.c
  59. flow.h
  60. gclient.c
  61. gclient.h
  62. gcompat.c
  63. gcompat.h
  64. gerror.c
  65. gerror.h
  66. gettime-thread.c
  67. gettime.c
  68. gettime.h
  69. GFIO-TODO
  70. gfio.c
  71. gfio.h
  72. ghelpers.c
  73. ghelpers.h
  74. goptions.c
  75. goptions.h
  76. graph.c
  77. graph.h
  78. hash.h
  79. helper_thread.c
  80. helper_thread.h
  81. helpers.c
  82. helpers.h
  83. HOWTO.rst
  84. idletime.c
  85. idletime.h
  86. init.c
  87. io_ddir.h
  88. io_u.c
  89. io_u.h
  90. io_u_queue.c
  91. io_u_queue.h
  92. ioengines.c
  93. ioengines.h
  94. iolog.c
  95. iolog.h
  96. json.c
  97. json.h
  98. libfio.c
  99. log.c
  100. log.h
  101. Makefile
  102. memory.c
  103. minmax.h
  104. MORAL-LICENSE
  105. optgroup.c
  106. optgroup.h
  107. options.c
  108. options.h
  109. parse.c
  110. parse.h
  111. printing.c
  112. printing.h
  113. profile.c
  114. profile.h
  115. pshared.c
  116. pshared.h
  117. rate-submit.c
  118. rate-submit.h
  119. README.rst
  120. REPORTING-BUGS
  121. rwlock.c
  122. rwlock.h
  123. SERVER-TODO
  124. server.c
  125. server.h
  126. smalloc.c
  127. smalloc.h
  128. stat.c
  129. stat.h
  130. STEADYSTATE-TODO
  131. steadystate.c
  132. steadystate.h
  133. td_error.c
  134. td_error.h
  135. thread_options.h
  136. tickmarks.c
  137. tickmarks.h
  138. time.c
  139. trim.c
  140. trim.h
  141. verify-state.h
  142. verify.c
  143. verify.h
  144. workqueue.c
  145. workqueue.h
  146. zbd.c
  147. zbd.h
  148. zbd_types.h
  149. zone-dist.c
  150. zone-dist.h