Messages in this thread | | | From | Pasha Tatashin <> | Subject | [PATCH v2 0/2] Allow to kexec with initramfs larger than 2G | Date | Fri, 27 May 2022 02:55:33 +0000 |
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Currently, the largest initramfs that is supported by kexec_file_load() syscall is 2G.
This is because kernel_read_file() returns int, and is limited to INT_MAX or 2G.
On the other hand, there are kexec based boot loaders (i.e. u-root), that may need to boot netboot images that might be larger than 2G.
The first patch changes the return type from int to ssize_t in kernel_read_file* functions.
The second patch increases the maximum initramfs file size to 4G.
Tested: verified that can kexec_file_load() works with 4G initramfs on x86_64.
Pasha Tatashin (2): fs/kernel_read_file: Allow to read files up-to ssize_t kexec_file: Increase maximum file size to 4G
fs/kernel_read_file.c | 38 ++++++++++++++++---------------- include/linux/kernel_read_file.h | 32 +++++++++++++-------------- include/linux/limits.h | 1 + kernel/kexec_file.c | 10 ++++++--- 4 files changed, 43 insertions(+), 38 deletions(-)
-- 2.36.1.124.g0e6072fb45-goog
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