100.000 damage taken is quite a bit, especially in one session. Meaning in one go. If you save and reload, the internal counter is reset.
I was doing this on my Hardcore play-through and was really aiming to get all the deed modifiers to help me out. Sustaining 100k damage will net you the Enduring Champion deed which gains you +2 stamina, or +20 hit-points.
Enduring Champion (10)
Survive 100,000 points of damage in one adventure - but ideally not in one hit.
The blades did about 150-160 damage each swing, roughly every second. My character had 1500 hit-points and was resurrected on the money every time, with 750 hit-points. This was the perfect set-up and I just left the game alone and went on to do something else in the meantime.