id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	field_blocks	field_dependson	field_seealso
552	Optimize fibril creation	Martin Decky	Martin Decky	"The creation of new fibrils and allocating stacks for them for every single IPC notification (e.g. interrupt notification) puts a lot of stress on the system. It is observed to even cause PS/2 protocol desynchronization on very slow machines (e.g. QEMU).

There are several ways how this issue can be mitigated. This ticket provides an overview of them:

 * Optimizing the new bitmap frame allocator (especially the bitmap search itself, which is currently very suboptimal).
 * Optimizing the page mapping manipulation by caching the intermediate levels of the page table.
 * Implementing a fibril pool that would avoid the need to create and discard all the precious resources for each single notification.
 * Allocate the fibril stacks from a different sequence of pages than the heap to avoid unnecessary heap fragmentation."	defect	closed	critical	0.7.0	helenos/kernel/generic	mainline	fixed