OpenE2K
/
qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

Swap only altered elements of the grouplist in getgroups() (Kirill Shutemov). 

getgroups() returns the number of supplementary group IDs, so it's
unnessary to swap the entire array.  It can dramatically speed up
the syscall: on recent Linux kernels NGROUPS_MAX=65536.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5267 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
balrog 2008-09-20 02:12:08 +00:00
parent cb3bc23361
commit a2155fcc65
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
linux-user/syscall.c
View File

@ -5253,7 +5253,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
target_grouplist = lock_user(VERIFY_WRITE, arg2, gidsetsize * 2, 0);
if (!target_grouplist)
goto efault;
for(i = 0;i < gidsetsize; i++)
for(i = 0;i < ret; i++)
target_grouplist[i] = tswap16(grouplist[i]);
unlock_user(target_grouplist, arg2, gidsetsize * 2);
}
@ -5407,7 +5407,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
ret = -TARGET_EFAULT;
goto fail;
}
for(i = 0;i < gidsetsize; i++)
for(i = 0;i < ret; i++)
target_grouplist[i] = tswap32(grouplist[i]);
unlock_user(target_grouplist, arg2, gidsetsize * 4);
}