We don't want to be holding the MM lock if it's a user region and we
have to consult the page directory, since that can lead to a deadlock
if we don't already have the page directory lock.
- Use the receiver's per-CPU entry in the message, instead of the
sender's. (Using the sender's entry wasn't safe for broadcast
messages since the same entry ended up on multiple message queues.)
- Retry the CAS until it *succeeds* instead of *fails*. This closes a
race window, and also ensures a correct return value. The return value
is used by the caller to decide whether to broadcast an IPI.
This was the main reason smp=on was so slow. We had CPUs busy-waiting
until someone else triggered an IPI and moved things along.
- Add a CPU pause hint to the spin loop. :^)
It may happen that CPU A manages to page in from the same inode
while we're just entering the same page fault handler on CPU B.
Handle it gracefully by checking if the data has already been paged in
(instead of VERIFY'ing that it hasn't) and then remap the page if that's
the case.
Due to a boolean mistake in smp_return_to_pool(), we didn't retry
pushing the message onto the freelist after a failed attempt.
This caused the message pool to eventually become completely empty
after enough contentious access attempts.
This patch also adds a pause hint to the CPU in the failed attempt
code path.
Earlier, we were using 0 value for characters not found in "map".
We should return failure for invalid inputs.
So, I have changed the return type of function to Optional<size_t>.
Also changed caller to handle Optional return.
Fixed convert_from_string() function to return correct output.
The value of a number is equal to sum of each digit multiplied by it's
positional weight.
This adds support for the Tools in PixelPaint to use different cursors
within ImageEditor. For now most of them get the crosshair cursor since
it's the most fitting, but in the future we will want to add custom
cursors.
This library is used by virtually all executables in the Clang
toolchain. By default, it is linked statically, which leads to huge
file sizes and us running out of artifact storage disk space on CI.
The kernel panic handler now parses the kernels boot_mode to decide how
to handle the panic. So the previous logic could end up in an panic loop
until we blew out the kernel stack.
Instead only validate the kernel's boot mode once per boot, after
initializing the kernel command line.
Clang builds will no longer be apart of the automated CI for every Push/
Pull Request, and will instead be ran at 00:00 UTC every day, with the
results posted to the discord #clang-toolchain channel.
Add a JS_ENUMERATE_INTL_OBJECTS macro and use it to generate:
- Forward declarations
- CommonPropertyNames class name members
- Constructor and prototype GlobalObject members, getters, visitors,
and initialize_constructor() calls
This is the start of implementing ECMA-402 in LibJS, better known as the
ECMAScript Internationalization API.
Much like Temporal this gets its own subdirectory (Runtime/Intl/) as
well as a new C++ namespace (JS::Intl) so we don't have to prefix all
the files and classes with "Intl".
https://tc39.es/ecma402/
This commit adds the PlainYearMonth object itself, its constructor and
prototype (currently empty), and the CreateTemporalYearMonth and
ISOYearMonthWithinLimits abstract operations.
