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| author | Benjamin Berg <benjamin.berg@intel.com> | 2025-03-14 14:08:15 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2025-03-18 11:06:20 +0100 |
| commit | 887c5c12e80c8424bd471122d2e8b6b462e12874 (patch) | |
| tree | 259c6a7ccefbdbc5af825a49012d6a4eb1c6bd99 /drivers/usb/cdns3/cdns3-debug.h | |
| parent | um/locking: Remove semicolon from "lock" prefix (diff) | |
| download | linux-887c5c12e80c8424bd471122d2e8b6b462e12874.tar.gz linux-887c5c12e80c8424bd471122d2e8b6b462e12874.zip | |
um: work around sched_yield not yielding in time-travel mode
sched_yield by a userspace may not actually cause scheduling in
time-travel mode as no time has passed. In the case seen it appears to
be a badly implemented userspace spinlock in ASAN. Unfortunately, with
time-travel it causes an extreme slowdown or even deadlock depending on
the kernel configuration (CONFIG_UML_MAX_USERSPACE_ITERATIONS).
Work around it by accounting time to the process whenever it executes a
sched_yield syscall.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://patch.msgid.link/20250314130815.226872-1-benjamin@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-debug.h')
0 files changed, 0 insertions, 0 deletions