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Add UFFD write protection for tracking dirty pages #1297

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Add UFFD write protection for tracking dirty pages #1297

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@ValentaTomas ValentaTomas commented Oct 5, 2025 •
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  • Add basic implementation (compatible with current FC/pause)
  • Test UFFD with WP reregister

@ValentaTomas
Wrap uffd fd in a struct with corresponding methods; Move the low lev…
a929999 
…el uffd handling to a subpackage
@ValentaTomas
Unify receiver name
58a4d41
@ValentaTomas
[WIP] Add uffd tests
e3d6716
@ValentaTomas
Add disabled wp
56e43c8
@ValentaTomas
[WIP] WP
acc2d66
@ValentaTomas
[WIP] Check multicopy
1c4b8ea
@ValentaTomas
[WIP] Multicopy
9d7f5e5
@ValentaTomas
Remove experiments
66a1bbe
@ValentaTomas
Add the page alignment check (only in method)
e774a92
@ValentaTomas
Remove commented out part
f240542
@ValentaTomas
Remove unused return field
f31cb47
@ValentaTomas
Cleanup
bfc5935
@ValentaTomas
Remove WP parts
f732d5a
@ValentaTomas
Cleanup
855369b
@ValentaTomas
Fix compile errors
f981d76
@ValentaTomas
Cleanup
ccd8396
@ValentaTomas
Simplify offset check
fbf258a
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Clarify comment
67b1bfb
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Add test constant
28c48a7
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Fix incorrect log
1ecd0a1
@ValentaTomas
Fix format
4fe40a0
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Remove conversion
bd8dc0b
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Make method public
f0d17ef
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Add command context
c4691b5
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Fix error formatting
9581305
@ValentaTomas
Fix error formatting
fa72b74
@ValentaTomas
Improve error comparison
8230e4f
@ValentaTomas
Fix error formatting
1454794
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Change process exit
ac484d2
@ValentaTomas
Enable unpriviledged uffd mode in GH PR tests
f2d01de
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linear bot commented Oct 5, 2025

ENG-3093 Use UFFD WP to only save dirty pages (written to)

@ValentaTomas ValentaTomas removed the request for review from djeebus October 5, 2025 19:34
@ValentaTomas ValentaTomas force-pushed the use-uffd-wp-to-only-save-dirty-pages-written-to-eng-3093 branch from 97f8f33 to b4f9065 Compare October 6, 2025 18:08
@ValentaTomas ValentaTomas force-pushed the use-uffd-wp-to-only-save-dirty-pages-written-to-eng-3093 branch from b4f9065 to f2a012a Compare October 6, 2025 21:05
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@jakubno jakubno Awaiting requested review from jakubno jakubno will be requested when the pull request is marked ready for review jakubno is a code owner

@dobrac dobrac Awaiting requested review from dobrac dobrac will be requested when the pull request is marked ready for review dobrac is a code owner

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