On 02/27/22 at 11:07am, Zhen Lei wrote: > The crashkernel=Y,low is an optional command-line option. When it doesn't > exist, kernel will try to allocate minimum required memory below 4G > automatically. Give it a unique error code to distinguish it from other > error scenarios. > > Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx> > --- > kernel/crash_core.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/kernel/crash_core.c b/kernel/crash_core.c > index 256cf6db573cd09..4d57c03714f4e13 100644 > --- a/kernel/crash_core.c > +++ b/kernel/crash_core.c > @@ -243,9 +243,8 @@ static int __init __parse_crashkernel(char *cmdline, > *crash_base = 0; > > ck_cmdline = get_last_crashkernel(cmdline, name, suffix); > - > if (!ck_cmdline) > - return -EINVAL; > + return -ENOENT; Firstly, I am not sure if '-ENOENT' is a right value to return. From the code comment of ENOENT, it's used for file or dir? #define ENOENT 2 /* No such file or directory */ Secondly, we ever discussed the case including - no crashkernel=,low is provided; - messy code is provied, e.g crashkernel=aaaaaabbbb,low The 2nd one is not handled in this patchset. How about taking the handling into another round of patches. This patchset just adds crashkernel=,high purely. > > ck_cmdline += strlen(name); > > -- > 2.25.1 >
