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| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2022-07-19 07:16:35 +0200 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2022-07-20 17:21:41 +0200 |
| commit | 6d2e5a4a13da2e91a46a37cd00d23dba8613ad7b (patch) | |
| tree | edbdcca483dc5378818aa1a20582fa7a1b4c9927 /arch/s390/include/asm | |
| parent | d6da67378198e4caa37404f87851659553b936b9 (diff) | |
| download | linux-6d2e5a4a13da2e91a46a37cd00d23dba8613ad7b.tar.gz linux-6d2e5a4a13da2e91a46a37cd00d23dba8613ad7b.tar.bz2 linux-6d2e5a4a13da2e91a46a37cd00d23dba8613ad7b.zip | |
s390/crash: use static swap buffer for copy_to_user_real()
Currently a temporary page-size buffer is allocated for copying
oldmem to user space. That limits copy_to_user_real() operation
only to stages when virtual memory is available and still makes
it possible to fail while the system is being dumped.
Instead of reallocating single page on each copy_oldmem_page()
iteration use a statically allocated buffer.
This also paves the way for a further memcpy_real() rework where
no swap buffer is needed altogether.
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Link: https://lore.kernel.org/r/334ed359680c4d45dd32feb104909f610312ef0f.1658206891.git.agordeev@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm')
0 files changed, 0 insertions, 0 deletions