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| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2022-09-06 02:08:38 +0200 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2022-09-27 09:30:46 +0200 |
| commit | f93b76958a358e82bfdd1474598fe75184afeb4d (patch) | |
| tree | 12afdebbd88ade70a4313fd25f54db9f33349ad9 /linux-user/syscall.c | |
| parent | 375ce49be285c5ff73674674350cc99807dfac83 (diff) | |
| download | focaccia-qemu-f93b76958a358e82bfdd1474598fe75184afeb4d.tar.gz focaccia-qemu-f93b76958a358e82bfdd1474598fe75184afeb4d.zip | |
linux-user: Passthrough MADV_DONTNEED for certain file mappings
This is a follow-up for commit 892a4f6a750a ("linux-user: Add partial
support for MADV_DONTNEED"), which added passthrough for anonymous
mappings. File mappings can be handled in a similar manner.
In order to do that, mark pages, for which mmap() was passed through,
with PAGE_PASSTHROUGH, and then allow madvise() passthrough for these
pages. Drop the explicit PAGE_ANON check, since anonymous mappings are
expected to have PAGE_PASSTHROUGH anyway.
Add PAGE_PASSTHROUGH to PAGE_STICKY in order to keep it on mprotect().
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220725125043.43048-1-iii@linux.ibm.com>
Message-Id: <20220906000839.1672934-5-iii@linux.ibm.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user/syscall.c')
0 files changed, 0 insertions, 0 deletions