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update Known Errata (RCU) stuff

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Kaiwan N Billimoria
2024-09-15 08:52:38 +05:30
parent a6d3f4d07f
commit c750a2a97b
1 changed files with 32 additions and 10 deletions
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README.md
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@@ -82,18 +82,40 @@ with<br>
- page 264:
- Added the ch6/countem2.sh Bash script to the repo; it complements the ch6/countem.sh script, adding on a few details
- Ch 13, *Figure 13.14* - the circled numbers mentioned in the book are missing. The reason: I eventually removed the circled numbers from *Figure 13.14* as it was already a bit too crowded, but inadvertently missed updating the text; apologies, my mistake! So, **please ignore** the following:
- Ch 13
- *Sincere apologies!* I've made several (small-ish) mistakes here! (please read on...)
- *Figure 13.14* - the circled numbers mentioned in the book are missing. The reason: I eventually removed the circled numbers from *Figure 13.14* as it was already a bit too crowded, but inadvertently missed updating the text; apologies, my mistake! So, **please ignore** the following:
- page 716:
- The sentences " (See *Figure 13.14* and the (red) circle with 2 in it.)", "(See *Figure 13.14* and the (red) circle with 3 in it.)" and " (See *Figure 13.14* and the (red) circle with 3 in it.)".
- page 718:
- The sentence " (See *Figure 13.14*, with the (red) circles with 4 and 5 in them, respectively.".
- page 720:
- The phrases "(see *Figure 13.14* and the (red) circle with 1 in it)".
- page 721:
- The phrase " (see *Figure 13.14* and the (red) circle with 2 in it)" and "(see *Figure 13.14* and the (red) circle with 3 in it)".
- page 722:
- The phrase "(see *Figure 13.14* and the (red) circles with 4 and 5 in them, respectively)".
- page 716:
- The sentences " (See *Figure 13.14* and the (red) circle with 2 in it.)", "(See *Figure 13.14* and the (red) circle with 3 in it.)" and " (See *Figure 13.14* and the (red) circle with 3 in it.)".
- "*Figure 13.12: A writer thread comes along and creates a copy of the data object (notice that it’s begun to modify its content); the vertical line – once a writer enters – separates the old
RCU readers (1, 2, and 3) from the new one (4)*" is incorrect. It should read:
"*Figure 13.12: A writer thread comes along and creates a copy of the data object (notice that
it’s begun to modify its content)*"
- The phrases "and any subsequent “new” reader (RCU readers 4)", "and any subsequent “new” reader (like RCU readers 4 and 5 in *Figure 13.13*)" should be:
"and any subsequent “new” reader (RCU readers 5)", "and any subsequent “new” reader (like RCU reader 5 in *Figure 13.13*)"
- page 717:
- "*Figure 13.13: The pre-existing RCU readers (1 to 3) refer to the old reality; the writer and new readers (4 and 5) see the new reality*" should be:
"*Figure 13.13: The pre-existing RCU readers (1 to 4) refer to the old reality; the writer and
new reader (5) see the new reality*"
- page 718:
- The sentence " (See *Figure 13.14*, with the (red) circles with 4 and 5 in them, respectively.".
- page 720:
- The phrases "(see *Figure 13.14* and the (red) circle with 1 in it)".
- page 721:
- The phrase " (see *Figure 13.14* and the (red) circle with 2 in it)" and "(see *Figure 13.14*
and the (red) circle with 3 in it)".
- page 722:
- The phrase "(see *Figure 13.14* and the (red) circles with 4 and 5 in them, respectively)".
- The sentence "(In this particular example, even the new RCU reader 4 has finished and context-switched; it can happen. Note though that it’s reading the new object.)" is just wrong. RCU reader 4 is an 'old' reader
- page 719:
- "The point by which all the older (pre-existing) RCU readers (here, 1 to 3) finish and context-switch off their core is shown via the thick vertical line. (In this particular example, even the new RCU reader 4 has finished and context-switched; it can happen. Note though that it’s reading the new object.)" should read:
"At some point all the older (pre-existing) RCU readers (here, 1 to 4) finish and context-switch off their cores."
- page 726:
- whoops, fix the memory leak!
- `if (!gd_new) { spin_unlock(&gdata_lock); return -ENOMEM; }`
<br>
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