On Thu, 01 May, at 09:15:48PM, Dave Young wrote: > > earlyprintk=efi,keep will cause kernel hangs while freeing initmem like below: > [ 2.826089] VFS: Mounted root (ext4 filesystem) readonly on device 254:2. > [ 2.846592] devtmpfs: mounted > [ 2.856974] Freeing unused kernel memory: 880K (ffffffff817d4000 - ffffffff818b0000) > > It is caused by efi earlyprintk use __init function which will be freed later. > Such as early_efi_write is marked as __init, also it will use early_ioremap > which is init function as well. > > To fix this issue, I added early initcall early_efi_map_fb which maps the whole > efi fb for later use. OTOH, adding a wrapper function early_efi_map which calls > early_ioremap before ioremap is available. > > With this patch applied efi boot ok with earlyprintk=efi,keep console=efi > > Signed-off-by: Dave Young <dyoung@xxxxxxxxxx> > --- > arch/x86/platform/efi/early_printk.c | 83 ++++++++++++++++++++++++++--------- > 1 file changed, 64 insertions(+), 19 deletions(-) Thanks Dave, applied! -- Matt Fleming, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
