> -----Original Message----- > From: Benjamin Herrenschmidt > [mailto:[EMAIL PROTECTED] > Sent: Monday, March 31, 2008 0:49 > To: [EMAIL PROTECTED] > Cc: linuxppc-dev@ozlabs.org; Gilad Ben-Yossef; Paul > Mackerras > Subject: [PATCH] powerpc: Fix deadlock with > mmu_hash_lock in > hash_page_sync > > hash_page_sync() takes and releases the low level > mmu hash lock in order > to sync with other processors disposing of page > tables. Because that > lock can be needed to service hash misses triggered > by interrupt > handler, taking it must be done with interrupts off. > However, > hash_page_sync() appear to be called with interrupts > enabled, thus > causing occasional deadlocks. > > We fix it by making sure hash_page_sync() masks > interrupts while holding > the lock. > > Signed-off-by: Benjamin Herrenschmidt > <[EMAIL PROTECTED]> > --- > > Please test and report asap thought it's probably > too late for 2.6.25, > it can still go into stable later on. >
Thank you for the quick acknowledgment and patch. Patch works well. Thanks, Gaash _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
