Re: [PATCH] powerpc/32s: Don't flush all TLBs when flushing one page
From: Segher Boessenkool <hidden>
Date: 2020-01-31 15:52:16
Also in:
lkml
On Fri, Jan 31, 2020 at 03:37:34PM +0000, Christophe Leroy wrote:
When the range is a single page, do a page flush instead.
+ start &= PAGE_MASK;
+ end = (end - 1) | ~PAGE_MASK;
if (!Hash) {
- _tlbia();
+ if (end - start == PAGE_SIZE)
+ _tlbie(start);
+ else
+ _tlbia();
return;
}For just one page, you get end - start == 0 actually? Segher