On Thu, Oct 17, 2024 at 12:14 PM Pedro Falcato pedro.falcato@gmail.com wrote:
On Thu, Oct 17, 2024 at 09:20:20AM -0700, Jeff Xu wrote:
On Thu, Oct 17, 2024 at 1:18 AM Lorenzo Stoakes lorenzo.stoakes@oracle.com wrote:
NACK. Greg's bot got to it but...
As per Greg's bot, no signed-off-by line.
Sorry for confusion, I wasn't meant to send this as a PATCH, but reporting the issue. The diff was just sent as reference to repro the bug, and I forgot to remove PATCH from the title. I apologize for the confusion.
Can you explain what the issue is? I don't get it.
The issue is there is one VMA that gets splitted after an unmap call fails. Two splitted VMA share the same attributes. e.g.
- Allocate 12 pages (0-11). - Seal middle 4 pages (4567) - munmap (2345) - this will fail due to 4567 being sealed.
The VMA for page (0123) is split as 2 VMAs (01)-(23), those 2 VMA have the same attribute, and should be merged as one.
-- Pedro