On 20/02/2018 18:04, Peter Lieven wrote: > Hi, > > I remember we discussed a long time ago to limit the stack usage of all > functions that are executed in a coroutine > context to a very low value to be able to safely limit the coroutine > stack size as well.
IIRC the only issue was that hw/ide/atapi.c has mutual recursion between ide_atapi_cmd_reply_end -> ide_transfer_start -> ahci_start_transfer -> ide_atapi_cmd_reply_end. But perhaps it's not an issue, somebody needs to audit the code. > I checked through all functions in block/, migration/ and nbd/ and there > are only very few larger or unbound stack > allocations that can easily be fixed. Yeah, the really large allocations are very few and mostly have to do with networking (https://wiki.qemu.org/BiteSizedTasks#Large_frames). Unfortunately the link to the original list has died together with the gmane archives. Paolo
