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3 commits

Author SHA1 Message Date
Shintaro Kawamura
f20622f6fb swap: handle ENOMEM error from userfaultfd 
userfaultfd returns ENOMEM on register if the corresponding process is
obsolete (e.g. the process dies, memory space is refleshed by execve).

BUG=b:253555760
TEST=cargo test -p swap

Change-Id: I9a6a7f0ed45cdc91bdf17e5d29e4c215b7f575a5
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4025736
Reviewed-by: David Stevens <stevensd@chromium.org>
Commit-Queue: Shin Kawamura <kawasin@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
 2022-11-17 02:39:55 +00:00
Shintaro Kawamura
87679c98d2 swap: fix tempdir usage in tests 
Directories from TempDir::into_path() are not automatically deleted.
We should use TempDir::path() instead.

BUG=b:253555760
TEST=cargo test -p swap

Change-Id: I9f0c5398a7eaa16317f9e40f16231f9b7df0a3a5
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4033426
Reviewed-by: David Stevens <stevensd@chromium.org>
Commit-Queue: Shin Kawamura <kawasin@google.com>
 2022-11-17 02:37:47 +00:00
Shintaro Kawamura
df2ec8ec88 Reland "swap: add PageHandler" 
origin:
https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3944711

PageHandler handles events from userfaultfd using SwapFile.

tests are placed as integration tests since they rely on userfaultfd(2).

design document: go/tanooki-phase1-dd

BUG=b:215093219
TEST=cargo test -p swap page_handler

Change-Id: I64d213d27174d75ee618c4675ea52dbac58bfe59
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4016144
Reviewed-by: David Stevens <stevensd@chromium.org>
Commit-Queue: Shin Kawamura <kawasin@google.com>
 2022-11-14 06:14:07 +00:00