Changes

416 bytes removed , 19:36, 23 May 2023

Done upstream: Continue removing TIF_IA32 from uprobes & Oprofile

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== Needs to be done (TODO) ==

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~~=== List of failed tests ===~~

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~~The table is being kept up-to-date by [[User:Dsafonov|Dsafonov]] with latest kernel/CRIU patches in his environment, some of which may be yet not in tree or even yet not sent.~~

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~~{| class="wikitable"~~

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~~! Name~~

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~~! Fail reason~~

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|-

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| futex-rl || sys_get_robust_list() should be compat syscall for 32-bit tasks: kernel keeps two different lists: <code>robust_list</code> and <code>compat_robust_list</code> in <code>task_struct</code>

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|-

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~~| autofs || test's bug - hangs without C/R~~

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~~| vdso01 || need to add 32-bit vDSO symbols: __kernel_* (and check them with handlers in test)~~

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|}

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~~=== Fixes for older kernels ===~~

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~~For kernels with backported mainline patches for 32-bit C/R (like vzkernel) there are a couple of things to do like different sizes of vdso/vvar (or vvar may not be even present).~~

=== Kernel patch for vsyscall page ===

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At this moment we'll support only compat ia32 applications, attempt to dump x32 compat binary should result in error.

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=== Continue removing TIF_IA32 from uprobes & Oprofile ===

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This flag should be gone as it's suggested by Andy & Oleg.

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There is quite lot of work to make kernel work without it, but small gain:

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the restored ia32 process will be traced by uprobes/oprofile and stuff like that.

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'''Updated''': Done by [https://lore.kernel.org/all/20201004032536.1229030-1-krisman@collabora.com/T/#u patches] - that merged to v5.11

== External links ==

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* [https://github.com/~~xemul~~/criu/issues/43 github issue]

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* [https://github.com/checkpoint-restore/criu/issues/43 github issue]

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~~[[Category: Development]]~~

[[Category: Under the hood‏‎]]

Dsafonov

105

edits

Changes

32bit tasks C/R (edit)

Revision as of 19:36, 23 May 2023